2024-03-29T02:05:12Z
https://jpp.journals.ekb.eg/?_action=export&rf=summon&issue=11068
Journal of Plant Production
2090-3669
2090-3669
2013
4
6
EFFECT OF HUMIC ACID, BIO-FERTILIZERS AND MICRO-ELEMENTS ON LEAF MINERAL CONTENTS OF KING RUBY GRAPEVINES
M.
El-Boray
M.
Mostafa
Doaa
Hamza
The present investigation was carried out during the seasons of 2011 and 2012 to study the effect of soil application of humic acid (at 0.75, 1.5 and 3 g / vine) with or without bio-fertilizers (Serratia sp. + Bacillus polymyxa + Pseudomonas fluorescens + Trichoderma viride + Trichoderma harzianum) at 7.14 ml / vine and micro-elements (FeSO4.7H2O at 0.35 g + ZnSO4.7H2O at 0.18 g + MnSO4.H2O at 0.18 g) / vine on mineral contents of King Ruby leaf petioles.
Results obtained showed that adding humic acid at 3 g\vine with bio-fertilizers at 7.14 ml\vine and micro-elements (FeSO4.7H2O at 0.35 g + ZnSO4.7H2O at 0.18 g + MnSO4.H2O at 0.18 g) / vine, activated the absorption of macro-elements since it produced significantly the highest values of N, P and K content in leaf petioles when compared with all of the other treatments, N values were 3.83 and 3.71 %, P values were 0.47 and 0.42 % and K values were 2.49 and 2.59 % in 2011 and 2012 seasons, respectively. Concerning micro-elements, it was observed that adding humic acid at 3 g\vine with bio-fertilizers and micro-elements also activated micro-elements uptake by grapevines, it recorded in 2011 and 2012, respectively the highest values, Fe was (131.00 and 128.43 ppm), Zn (45.40 and 47.70 ppm) and Mn was (150.07 and 143.37 ppm). On the other hand, the control treatment gave the lowest values of macro and micro-elements if compared to those resulted in the other treatments in both seasons of the study.
2013
06
01
871
883
https://jpp.journals.ekb.eg/article_73289_a02718dab4e6267da16cd3792d8cab2b.pdf
Journal of Plant Production
2090-3669
2090-3669
2013
4
6
EFFECT OF FOLIAR APPLICATION OF ETHEREL AND COMBINATION OF SOME MICRO-NUTREINTS ON PRODUCTIVITY OF EGYPTIAN COTTON PLANT
Sanaa
Gebaly
Two field experiments were carried out at Sakha Agricultural Research station, during the two successive seasons of 2011 and 2012. The objectives of this investigation was aimed to study the effect of foliar application of boron (B 1gm/L), molybdenum (Mo 0.8 gm/L) and etherel (Eth.) at two levels (5 and 10 PPm) single or in combination in comparison with untreated (spraying water) as control on growth, earliness, seed cotton yield and it components and leaf chemical composition of Egyptian cotton hybrid (10229 x Giza 86) G. barbadense L.. The obtained results could summarized as follows:
Foliar application of B., Mo. and Eth. significantly increased No. of flowers/plant, boll retention, earliness %, No. of open bolls/plant, seed index and seed cotton yield/fed., but plant height, No. of fruiting branches/plant, lint % and boll weight were insignificantly increased. On the other hand, spraying cotton plants with B.at 1gm/L, Mo. at 0.8 gm/L and Eth. at 5 and 10 PPm tended to increase chemical content in cotton leaves i.e., chlorophyll a, b %, total chlorophyll and carotene, reducing and total soluble sugar, mono-phenol, poly and total phenols. Application of B., Mo., and Eth. tended to significant effects on fiber strength, upper half length and micronaire reading in both seasons. The highest values obtained from foliage spraying of cotton plant with Eth. 10 PPm + Mo. 8 gm/L at flowering stages improved performance and yield of cotton plant.
Cotton
Boron
molybdenum
etherel
Growth
earliness
yield components
leaf chemical composition and fiber prorerities
2013
06
01
885
895
https://jpp.journals.ekb.eg/article_73291_5f4cb4c849180f14028c8f45ceccdf0a.pdf
Journal of Plant Production
2090-3669
2090-3669
2013
4
6
EVALUATION OF NEW INBRED LINES OF WHITE MAIZE VIA LINE X TESTER ANALYSIS OVER THREE LOCATIONS
I.
EL- Gazzar
M.
EL-Ghonemy
S.
Mousa
Twenty four white maize inbred lines were top crossed with two testers i.e. SC 162, SC 166 in 2009 growing season. Resulting 48 crosses in addition to two commercial check hybrids i.e. SC 162 and TWC 352 were evaluated at Sakha, Mallawy and Ismaelia Agriculture Research Station Farms during 2010 growing season. Data were estimated on the following traits: silking date, plant height, ear height, grain yield, number of ears /100-plant, ear length and ear diameter. Mean squares for Lines (L), testers (T) and L x T interaction were significantly for all studied traits, except for grain yield and ear length of tester and for ear height and No.of ears/100-plant of L x T interaction. The best GCA effects for grain yield, number of ears/100-plant, ear length and ear diameter were obtained by inbred lines SK5001/1, SK5001/2, SK5001/6 and SK5001/9, respectively. Also, the inbred lines SK5002/12, SK 5002/19 and SK5002/19 showed better GCA effects for silking date, plant height and ear height, respectively. The tester SC162 showed the best GCA effects for grain yield, number of ears/100-plant, ear length and ear height. Moreover, the tester SC166 was the best combiner for earliness, shorter plant type and ear diameter. The best crosses for specific combining ability were SK 5001/6 χ SC162 for earliness, SK5002/20 χ SC162 for plant height, SK5002/22 χ SC166 for grain yield, SK5001/2 χ SC162 for number of ears/100- plant and SK5002/10 χ SC166 for ear length and ear diameter. The highest mean values of crosses for grain yield were obtained from the SK5001/1 x SC162 (33.67 ard. /fed.), SK5001/7 x SC162 (33.59 ard./fed.). These three way crosses outyielding significantly than the commercial hybrids TWC 352 (27.54 ard./fed.) and SC 162 (30.86 ard./fed.). The additive gene effects were more important for silking date, plant height, ear height, grain yield, No.of ears/100-plant and ear diameter. While, the non additive gene effects were important for ear length. Moreover, non additive genetic effects was more interacted by locations than additive gene effects for all studied traits.
Maize
Zea mays L
line x tester
Combining ability
crosses
2013
06
01
897
906
https://jpp.journals.ekb.eg/article_73303_c208a4da46c682933fa705afc57af3bc.pdf
Journal of Plant Production
2090-3669
2090-3669
2013
4
6
EFFECT OF PLANT RESIDUALS, ORGANIC FERTILIZER AND SOME TREATMENTS THAT REDUCE SALINITY EFFECT ON GROWTH, YIELD AND QUALITY OF EGGPLANT (Solanum melongea L.)
Hala
El-Sayed
Aida
Abd El-Rahim
E.
El-Gamily
E.
Ismail
Two field experiments were carried out at a Farm in El-Mataryia district, Dakahlia Governorate during the two growing seasons of 2011 and 2012 to study the effect of organic fertilization and ammonium thiosulfate (ATS) levels that reduce salinity effect on vegetative growth, yield and its components and chemical constituents of eggplant crop Black Beauty cultivar. The experiments were carried out by using split – plots system in a randomized complete blocks design with three replications. The main plots were arranged with organic fertilization treatments. The sub plots were assigned to ammonium thiosulfate levels.
The obvious results of this investigation can be summarized as follows:
Using farmyard manure (FYM) and potassium humate (KH) treatments significantly increased all studied characters as compared with other organic fertilization treatments in both seasons. Application rice residues (RS) caused significant increases on all studied characters as compared with control treatment (without organic fertilization) in both seasons.
All studied characters were significantly influenced by different ATS levels in the both seasons. The highest values of these traits were resulted from using 30 L/fed and 40 L/fed of ATS, respectively in both seasons.
Generally, it could be recommended that using FYM or KH, respectively along with 30 L ATS/fed to enhance vegetative growth characters, yield and its components and chemical constituents of eggplant fruits. Also, it could be recommended that using RS combined with 30 L ATS/fed to enhance studied characters as compared with control treatment (without organic fertilization) and also to reduce sources of environmental pollution and maintain human health.
2013
06
01
907
919
https://jpp.journals.ekb.eg/article_73333_c8882672e08080d7af45f6b56051ad28.pdf
Journal of Plant Production
2090-3669
2090-3669
2013
4
6
DIFFERENTIATION AMONG FLAX CULTIVARS BY RAPD ANALYSIS AND SUSCEPTIBILITY TO SOME PATHOGENIC FUNGI
M.
Omar
A.
Aly
Shadia
Abd El-Aziz
Random amplified polymorphic DNA (RAPD) analysis was used to evaluate the genetic diversity of 10 flax cultivars. Flax cultivars showed varying levels of susceptibility to a set of pathogenic fungi. The tested cultivars were analyzed with four random decamer primers using the polymerase chain reaction (PCR). All the primers detected varying levels of polymorphism in all the tested cultivars. Cluster analysis by the unweighted pair-group method of arithmetic means (UPGMA) placed cultivars in several groups based on their RAPD-PCR banding patterns with overall similarity levels ranged from 4.05 to 94.72%. UPGMA also placed studied cultivars in several groups based on the patterns of susceptibility to a set of pathogenic fungi. The present study demonstrated that flax cultivars could be identified by their RAPD-PCR banding patterns, combined with their patterns of susceptibility to a set of pathogenic fungi. These results could be practical value for cultivar identification or for seed purity tests.
Flax genotypes
pathogenic fungi
polymerase chain reaction
RAPD analysis
Genetic diversity
2013
06
01
921
930
https://jpp.journals.ekb.eg/article_73410_6611a026b2543baab9e98f3c8eae2d52.pdf
Journal of Plant Production
2090-3669
2090-3669
2013
4
6
ESTIMATES OF COMBINING ABILITY AND HETEROSIS THROUGH LINE × TESTER IN EGYPTIAN COTTON
A.
Attia
M.
Badawi
A.
Zeina
A.
Said
General Combining ability of parents, specific combining ability of hybrids and heterosis over better parent were studied in a cross involving ten cotton genotypes ( 6 lines × 4 testers ) for yield and quality traits. The six lines were Egyptian cotton genotypes Giza 70, Menofi, Giza 86, Giza 89, Ashmoni and Dandara, While the four testers were involved two foreign cotton genotypes ( BBB and Suvin ) and two Egyptian cotton genotypes ( Giza 92 and Giza 88 ). Ten parents and 24 F1 hybrids were laid out in completely randomized block design with three replications at Sakha Agriculture Research Station in 2011 season. Analysis of variance revealed highly significant differences among genotypes, parents and crosses indicating the presence of considerable amount of genetic variability. Parents VS crosses was also significant, except for most fiber characters, indicating the presence of heterotic response for these characters. The magnitude of SCA variance was greater than GCA variance for all characters indicating the importance of SCA. The maximum contribution to the total variance was made by line × tester interaction for most characters. While the contribution of testers were higher than lines. The results reported that the best general combiner; for earliness were Dandara and Giza 86, for yield were Suvin amd Giza 92 and for fiber quality was Giza 70. On the basis of specific combining ability SCA effect for yield and its components characters in relation to significant positive heterosis over better parent, the crosses Giza 86 × Suvin, Dandra × Suvin and Giza 86 × BBB exhibited highest magnitude of positive significant SCA with desirable heterosis for yield characters. Therefore, these hybrids may be preferred to improve several yield characters simultaneously by selection or may be used for hybrid cotton crop development.
Gossypium barbadense
Combining ability
Heterosis
2013
06
01
931
941
https://jpp.journals.ekb.eg/article_73411_839cf9ce1d86160573d0ba29cffc46db.pdf
Journal of Plant Production
2090-3669
2090-3669
2013
4
6
IMPROVING EGYPTIAN COTTON USING F2 TRIALLEL CROSSES
A.
Abd El-Bary
The aim of this investigation is to determine combining ability estimates for yield, yield components traits and some fiber properties in cotton. The genetic materials used in the present study included five cotton lines and their 30 F2 three-way crosses. All these lines belong to the species Gossypium barbadense L. In 2010 growing season, these genotypes were evaluated in a field trial experiment at Sakha Agricultural Research Station, Kafr El-Sheikh Governorate. The following traits were estimated: seed cotton yield/plant, lint yield/plant, boll weight, lint percentage, fiber strength, fiber fineness and upper half mean.
The results showed that the performances of most the F2 three-way crosses were as good as or better than their both grand parents or/and their third parent. The mean squares of genotypes were highly significant for all studied traits. From the analyses of F2 triallel crosses, the parental lines Giza 86 (P1) and Suvin (P3) were the best combiners as a grand parent and/or parent for all studied traits except fiber fineness property. On the other hand, the variety Giza 89 (P5) was the best combiner as a grand parent for fiber fineness (F.F.) property. Therefore, these parental genotypes could be utilized in a breeding program to improve these traits through selection in the segregating generations.
The results also investigated that the crosses (P1 x P3) x P4 , (P1 x P5) x P2, (P2 x P5) x P4, (P3 x P5) x P4 and (P3 x P4) x P2 would be the best for all studied yield traits and upper half mean (UHM) property. Meanwhile, (P1 x P2) x P4, (P1 x P5) x P4 and (P2 x P3) x P4 appeared to be the best promising crosses for breeding toward all studied yield traits potentiality. In addition, the combinations (P1 x P4) x P5 and (P3 x P4) x P5 appeared to be the best promising for all studied yield traits, fiber strength (F.S.) and upper half mean (UHM) properties.Furthermore, the combination (P2 xP4) x P1 appeared to be the best promising for seed cotton yield/plant (S.C.Y./P.), lint yield per plant (L.Y./P.) and fiber fineness (F.F.) property. Most of these combinations had involved at least one of the best general combiners for yield.This indicates that predications of superior crosses based on the general combining ability effects of the parents which would be generally valid and the contribution of non-allelic interaction in the inheritance of these traits.These findings may explain the superiority of the three-way crosses over their parental lines for these traits.
Concerning epistatic variances, additive by additive genetic variances (s2AA), it showed positive values for all studied traits except for (F.F) property. While, additive by dominance genetic variances (s2AD) played the major role in controlling the inheritance of the studied characters of the triallel crosses. Therefore, recurrent selection might be useful in improving the studied characters of the triallel crosses in the breeding programs. The results also cleared that the calculated values of heritability in narrow sense ranged from 39.43% to 55.19% for seed cotton yield/plant (S.C.Y./P.) and fiber fineness (F.S.), respectively.
Cotton
Triallel analysis
Gene action and Combining ability
2013
06
01
943
956
https://jpp.journals.ekb.eg/article_73412_de7e11433cfac21f983ff92c456762f8.pdf
Journal of Plant Production
2090-3669
2090-3669
2013
4
6
EVALUATION OF SOME EGYPTIAN COTTON GENOTYPES UNDER DIFFERENT ENVIRONMENTS
A.
Abd EL-Bary
Thirty-six new cotton strains descending from fourteen Egyptian cotton crosses were included in trial A, and sixteen strains descending from ten crosses were included in trial B in 2009 season using three promising crosses and the commercial variety Giza 86 as checks. All the genotypes belong to Gosssypium barbadense L. Trial A was conducted at Kafr El-Sheikh, whereas trial B was out lined at five locations (Kafr El-Sheikh, El-Dakahleia, El-Monofeia, El-Sharkeia and El-Gharbeia) in Lower Egypt. The results of trial A showed that most of the genotypes belong to crosses significantly surpassed the check variety Giza 86 in both yield and its components. While, trial B showed that the seven strains were superiority across five locations. High heritability estimates in broad sense were recorded for most studied traits in trials A & B indicating that phenotypic selection for these strains could be highly effective.
The present study aimed to evaluate some of Egyptian cotton genotypes using stability statistic analysis which were applied to seed cotton yield, lint cotton yield, boll weight and earliness index.
The studied traits showed highly significant mean squares for, genotypes, environments and genotype x environment. The genotypes no. 10, 11, 13, 16 and the two promising crosses 10229 x Giza 86 and Giza 89 x Giza 86 observed average level of stability and surpassed mean performance for seed and lint cotton yield. The genotypes no. 10, 12, 13, 15 and the two promising crosses 10229 x Giza 86 and Giza 75 x Sea behaved the same way for boll weight and the genotypes no. 1, 5, 6, 8, 9, 10, 14, 15 and the three promising crosses 10229 x Giza 86, Giza 75 x Sea and Giza 89 x Giza 86 for earliness index.
Therefore, these genotypes may be recommended to be released as a commercial stable high yielding cultivar and / or incorporated to be as a breeding stock in any future breeding program aiming for producing stable high yielding lines for seed cotton yields, lint cotton yield, boll weight and earliness index.
Gosssypium barbadense
L
Promising lines
Seed cotton yield
Fiber characters
heritability
Stability statistic analysis
Trial A and Trial B
2013
06
01
957
972
https://jpp.journals.ekb.eg/article_73413_4f36738827304ef96c215ed4bd41fe3a.pdf
Journal of Plant Production
2090-3669
2090-3669
2013
4
6
RESPONSE OF THREE RICE CULTIVARS TO SEED CLASSES AND SOME SEED SOAKING TREATMEANTES
S.
EL-Kalla
A.
Salama
S.
Helal
El-Shimaa
Mostafa
Three rice cultivars (Giza 178, Sakha 101 and Sakha 104) under five seed soakingtreatments (water, ZnSO4 2 %, Di ammonium phosphate {DAP} 2%, GA3 120 mg/L, and cytokinine 75 mg/L) with using two seed classes (Basic seed and Certified seed) are studied in two field experiments at El-Senblawin Dakahlia Governorate during 2011 and 2012 seasons.
The aim of this study was to investigate the performance of identify three rice cultivars studying the genetic purity of tested varieties through the basic and certified seed classes under five soaking treatments on growth and yield of rice.
The obtained results could be summarized as follows:
Giza 178 cultivar and Sakha104 significantly surpassed the local cultivar Sakha101 in all studied characters in both seasons.
Using basic seed class recorded the highest values of plant height, number of tillers/hill, number of grains /panicle, grain weight /panicle, 1000-grain weight, grain yield /fed in both seasons. While, the certified Sowing seed produced the highest values of panicle length in both seasons.
The obtained results showed significant effect at seed soaking in both seasons. The seed soaking Znso4 significantly increased plant height, number of tillers/hill, number of grains/panicle, panicle weight (g) and1000 grain weight in both seasons.
The interaction among Giza 178, basic seed class and seed soaking znso4 gave the highest values of plant height, number of tillers/hill, panicle length, number of grains/panicle (g),grains/panicle (g), 1000 grain weight, and grain yield (t/fed) of rice.
2013
06
01
973
983
https://jpp.journals.ekb.eg/article_73414_107fb2a03fc610bbd217de9ca83ea237.pdf
Journal of Plant Production
2090-3669
2090-3669
2013
4
6
EFFECT OF IRRIGATION INTERVALS AND FOLIAR SPRAYING TREATMENTS ON GROWTH AND YIELD OF SOME RICE CULTIVARS
M.
Badawi
S.
El-Moursy
S.
Seadh
Y.
Souror
The field experiments were carried out at a Farm in El-Abhar Village, El-Hamoul Center, Kafr El-Sheikh Governorate, during 2011 and 2012 seasons to determine the effect of irrigation intervals (irrigation every 2, 4 and 8 days) and foliar spraying treatments (without foliar spraying, foliar spraying with Flowering-Spring fertilizer, Tecamin-Max fertilizer, Potassium- Sulphate and Ascorbic-Acid) on growth, yield and its attributes of some rice cultivars (IET 1444, Giza 177 and Giza 178). Each irrigation intervals was performed in separate experiment. Every experiment of irrigation intervals was carried out in strip plot design with three replications.
The results showed that normal irrigation schedule every 2 days (control treatment) associated with significant increases in all studied characters and resulted in the highest values in both seasons.
IET 1444 cultivar significantly superior the two local cultivars Giza 177 and Giza 178 and resulted in the highest values of most studied characters.
Foliar spraying rice plants with Tecamin max fertilizer surpassed other studied foliar spraying treatments and resulted in the highest values of all studied characters in both seasons. This treatment followed by spraying with Flowering spring fertilizer without significant differences between them in most characters, then potassium sulphate and then ascorbic acid in both seasons.
It can be concluded that, irrigated IET 1444 rice cultivar every 6 days and foliar spayed with Tecamin max or Flowering spring fertilizers could be recommend to raise productivity and save irrigation water and irrigated Giza 178 and Giza 177 rice cultivars every 2 days and foliar spayed with Tecamin max or Flowering spring fertilizers to maximize productivity under the environmental conditions of El-Hamoul district, Kafr El-Sheikh Governorate.
rice
Oryza sativa L
Irrigation intervals
irrigation treatment
Water stress
foliar spraying treatments
cultivars
varieties
Growth
yield
2013
06
01
985
998
https://jpp.journals.ekb.eg/article_73415_b3524fbb3270ac1e04e82d1ea0ee357a.pdf
Journal of Plant Production
2090-3669
2090-3669
2013
4
6
PRODUCTIVITY AND SEED QUALITY OF SOME SOYBEAN CULTIVARS AS AFFECTED BY SOME SEED TREATMENTS
A.
Attia
A.
Salama
S.
Seadh
M.
El-Emery
R.
El-Khiary
A field trial and a laboratory experiment were conducted during 2011 and 2012 seasons at the Experimental Station Farm, Faculty of Agriculture, MansouraUniversity and Seed Technology Research Unit at Mansoura, Dakahlia Governorate, Seed Technology Research Department, Field Crops Research Institute, AgriculturalResearchCenter. The main objective of this research was to study the performance of some soybean cultivars as affected by seed treatments and their effect on seed yield and its attributes as well as quality characteristics. Field experiments were laid out in a split- plot design with four replications. The main plots were occupied with three soybean cultivars i.e. Giza 21, Giza 35 and Giza 111. The sub-plots were assigned to eight seed treatments as follows; 1) Without seed treatment. 2) Treated seed with ascorbic acid. 3) Treated seed with fungicide Vetavax. 4) Treated seed with yeast extract. 5). Treated seed with ascorbic acid beside fungicide Vetavax. 6) Treated seed with ascorbic acid beside yeast extract. 7) Treated seed with fungicide vetavax beside yeast extract. 8) Treated seed with ascorbic acid beside fungicide vetavax and yeast extract. Laboratory experiments were conducted in factorial completely randomized design with four replications.
Results showed that Giza 21 cultivar surpassed other studied cultivars in all studied characters, followed by Giza 35 then Giza 111 in both seasons. Treated soybean seeds before planting with the combination treatment of Ascorbic + Vetavax + Yeast surpassed other studied seed treatments and resulted in the highest means of all studied characters in both seasons. This treatment followed by treating seeds with Ascorbic + Yeast treatment, then Ascorbic, Ascorbic + Vetavax, Vetavax + Yeast, Yeast and lastly Vetavax treatment in both seasons. On the contrary, the lowest means of all studied characters were produced from control treatment (without seed treatment) in both seasons. According to the obtained results from this study, it can be concluded that, treated seeds of soybean cultivar Giza 21 with the combination treatment of ascorbic acid beside fungicide Vetavax and yeast extract could be recommend to raise soybean productivity and seed quality under the environmental conditions of Dakahlia Governorate.
Soybean
cultivars
varieties
seed treatments
ascorbic acid
Vetavax
yeast extract
seed yield
seed quality
2013
06
01
999
1017
https://jpp.journals.ekb.eg/article_73416_c4f60237a06600f1cad4ae281cfc1a87.pdf
Journal of Plant Production
2090-3669
2090-3669
2013
4
6
EFFECT OF FOLIAR SPRAY WITH GIBBERELLIC ACID AND AMCOTONE ON FRUIT SET, DROPPING, COMPONENT YIELD AND FRUIT QUALITY OF WASHINGTON NAVEL ORANGE TREES
A.
Hikal
The present study was carried out during 2007 and 2008 on 15 years old Washington navel orange trees (C. sinensis Osbeck) grafted on sour orange (C. aurantium L.) rootstocks. Trees were grown under north delta conditions.
The results could be summarized in the following points:
1) The trees which sprayed with 100 g amcotone /100 L+ 20 ppm (GA3) gave the highest initial and final fruit set % and the lowest (June drop% and preharvest drop%) followed by the trees which sprayed with 50 g amcotone /100 L+ 20 ppm (GA3) which obtained the second order in this regard in both studied seasons.
Also, there are no significant effects on number sprayed doses in this respect.
2) The trees which sprayed with 100 g amcotone /100 L+ 20 ppm (GA3) gave the highest {fruits number and yield (kg) /tree} followed by the trees which sprayed with 50 g amcotone /100 L+ 20 ppm (GA3) which possessed the second order in this regard in both seasons. Also, the trees which sprayed with three doses (mid-March, late April and the beginning of August) obtained the highest {fruits number and yield (kg) /tree}.
3) Fruit shape (H/D ratio) was the highest in trees which sprayed with100 g amcotone /100 L+ 20 ppm (GA3) followed by trees which sprayed with 100 g amcotone /100 L+ 15 ppm (GA3) with insignificant effect of three treatments. Whereas, non- significant effects of the number of doses .
4) Physical properties of fruits under this study as { fruit weight (g), fruit size (cm3) and fruit juice weight (g) } the highest values obtained in trees which sprayed with100 g amcotone /100 L+ 20 ppm (GA3) followed by 50 g amcotone /100 L+ 20 ppm (GA3).Moreover, trees which sprayed with three doses (mid-March, late April and the beginning of August) gave the highest values in this respect.
5) Regarding to the chemical properties of fruits which studied as ( T.S.S. %, total acidity % and Vitamin C mg/100 ml juice) the treatments which sprayed with100 g amcotone/100 L+ 20 ppm (GA3) gave the highest values followed by the trees which sprayed with 50 g amcotone /100 L+ 20 ppm (GA3) . Also, the trees which sprayed with three doses (mid-March, late April and the beginning of August) gave the highest values in this respect .
6) Trees which sprayed with Amcotone/100L+20 ppm GA3 treatment gave the highest values of T.S.S. /acid ratio with insignificant effect when compared with other treatments under this study. Moreover, trees which sprayed with three doses (mid-March, late April and the beginning of August) gave the highest T.S.S. / acid ratio.
The recommendations:
It could be recommended that spraying “Washington” navel orange trees with100 g amcotone /100 L+ 20 ppm (GA3) three times at (mid-March, late April and the beginning of August) gave the highest values of initial and final fruit set %, decrease of June and preharvest drop %, increase of yield as fruit number and weight (kg) /tree, improvement fruit physical and chemical properties as {fruit weight (g) and size (cm3) and fruit juice weight (g),TSS% , total acidity % ,Vitamin C. and TSS/Acid ratio }.
2013
06
01
1015
1034
https://jpp.journals.ekb.eg/article_73417_da30a0198b4bba19a78d8c95eb322590.pdf