2024-03-28T22:26:39Z
https://jpp.journals.ekb.eg/?_action=export&rf=summon&issue=12812
Journal of Plant Production
2090-3669
2090-3669
2012
3
9
ESTIMATION OF THE CRITICAL PERIOD FOR WEED CONTROL IN SOYBEAN (Glycine max L) AS INFLUENCED BY PLANT DENSITY
N.
El-Gizawy
A.
Fadlallah
A.
Hassanein
I.
Soliman
Two field experiments were carried out at in clay soil in Agricultural Research and Experimental Center of Agriculture at Faculty of Moshtohor, Benha University, Kalubia Governorate during 2009 & 2010 summer seasons to determine the critical period of weed competition between weeds and soybean crop through use of regression and economic approaches and also determine the relationship between weeds and soybean yield under three plant densities (105, 140 and 175 thousand plant/ fad.) and ten treatments in two types of treatments (in the first type soybean was hand weeded for different periods 3, 6, 9 and 12 weeks after sowing (W.A.S.) and for whole season ,then no further weeding was done while, in the second type weeds were allowed to grow for different periods at 3, 6, 9 (W.A.S.) until harvest the weeds were removed by hand- weeded and weed competition treatment for whole season on seed yield of soybean and associated weeds.
The main results showed that, maximum yield losses of soybean due to weed competition in the whole season were 37.6 and 34.4 % from weed free treatments in 2009 and 2010 seasons. Mathematical model for the relationship between weed free and weed competition periods according to the recommended losing yield value (10), clear that critical period of weed competition under 105 thousand plants density/fad., were (6.5 and 7.0) weeks for weed free as well as (4.25 and 4.25) for weed competition in 2009 and 2010 seasons, respectively. Under 140 thousand plant density the respective values were (6.2 and 6.3) weeks for weed free as well as (3.9 and 4.2) for weed competition and for 175 thousand plant density were (5.9 and 5.6) weeks for weed free as well as (3.5 and4.15) weeks for weed competition in 2009 and 2010 seasons, respectively . The critical period of weed treatments over plant densities were (6.45 and 6.4) weeks for weed free as well as (4.9 and 4.65) weeks for weed competition in 2009 and 2010 seasons, respectively. All weed competition exerted significant efficiency in controlling annual weeds. Weed free for the whole season treatment gave the best control for annual weeds gave the highest values of yield and yield components in two seasons. The sowing 175000 plant/fad. gave the lowest weight for dry weight for annual weeds and the tallest plants in first and second seasons. 105000 plant/fad., gave the best values of No. of branches and seed weight/plant in the first and second seasons. 140000 plant/fad., gave the highest value of No. of seed pod, weight of 100 seed and yield ton/fad. in the two seasons. Plots weeded at 3 and 6 week after sowing showed the best performance in all aspects of soybean. Such knowledge should be disseminated to farmers to keep soybean yield losses of weed competition to maintain maximum soybean seed yield. This study showed that negative correlation for annual weed weight and all studied characters under study.
Weed infestation
plant density
hoeing
critical period
2012
09
01
2375
2394
https://jpp.journals.ekb.eg/article_84985_d37776cbff53f68f8060e70fed8b01d6.pdf
Journal of Plant Production
2090-3669
2090-3669
2012
3
9
SEED YIELD OF TWO ALFALFA GENOTYPES UNDER DIFFERENT ENVIRONMENTS
K.
Abdel-Gawad
A.
Metwally
H.
Aly
A field experiment was conducted at the Agricultural Experiments and Researches Station, CairoUniversity, Giza, Egypt from 2008 to 2011 to study the influence of cutting treatment before seed production and plant densities on seed yield of two alfalfa genotypes (Laboon and El-wadi El-Gadid).
In General, El-wadi El-Gadid surpassed Laboon in seed yield/feddan. Cutting genotypes twice before seed production recorded the highest seed yield and its components. Seed yield was significantly increased with increasing plant density from 8.400 to 134.400 plant/fed. The interaction between harvesting treatment and genotypes was significant for seed yield in 2010 and 2011 years. El-wadi El-Gadid produced the highest seed yield when cut twice. It also recorded the heaviest seed yield under plant density of 134.400 plant/fed. The second order interaction (El-wadi El-Gadid × cutting twice ×134.400 plant/fed) gave the highest seed yield in both years. Highly significant and negative correlation was observed between seed yield and number of pods /plant (-0.32) and seed index (-0.34).
alfalfa
Medicago sativa
cutting treatment
plant density
genotype
2012
09
01
2395
2409
https://jpp.journals.ekb.eg/article_84986_3f13b0cbf830358ca84d269ff864fe26.pdf
Journal of Plant Production
2090-3669
2090-3669
2012
3
9
THE BENEFICIAL EFFECT OF MINIMIZING MINERAL NITROGEN FERTILIZATION ON SEWY DATE PALM TREES BY USING ORGANIC AND BIOFERTILIZERS
M.
Salama
A.
El-Samak
A.
El-Morsy
K.
Aly
Minimizing mineral nitrogen fertilization through using 50% organic N (FYM) + 50% mineral N (urea) with Azotobacter chrococcum that fixed nitrogen as biofertilizer source were tested on mature Sewy date palm trees 12- years-old grown on sandy soil in private orchard located at El-Dakhla oasis, El-Wady El-Gedeed governorate. Leaf mineral content, yield and fruit quality especially fruit heavy metals, nitrate and nitrite contents and economic evaluation comparing with the traditional nitrogen fertilization (100% mineral nitrogen) were investigated. The obtained results showed that fertilizing palm with 50% organic N+ 50% mineral N+ biotreatments tended to increase N, P, K, Ca and Mg leaf contents. Moreover, treatments, 100% mineral or 50% organic N+ 50% mineral N+ biofertilizer significantly increased the yield kg/palm without non-significant differences between them in both seasons compared to other treatments. Both treatments of 100% organic or 50% organic N+ 50% mineral N+ biofertilizer improvement physical and chemical characteristics of date fruits. Also, content of heavy metals, nitrate and nitrite significantly reduced by tested treatments especially when added combined with treatment. So, it seems that yield, fruit quality and net income/fed of Sewy date palm trees could be greatly improved through fertilizing palm trees with 50% organic N+ 50% mineral N+ biofertilizer.
date palm
organic
biofertilizer
yield
fruit quality
nitrate and heavy metals contents
2012
09
01
2411
2424
https://jpp.journals.ekb.eg/article_84988_76ec0f969f508e1d3d3caefa0a4c31d8.pdf
Journal of Plant Production
2090-3669
2090-3669
2012
3
9
PHENOTYPIC AND GENOTYPIC CORRELATION COEFFICIENTS FOR SOME YIELD AND FIBER QUALITY TRAITS OF SEGREGATING POPULATIOS (F2, F3 AND F4) IN SOME EGYPTIAN COTTON CROSSES
M.
Srour
E.
El-Hashash
The present study was undertaken with a view to determine the extent of relationship between seed cotton yield and other economic traits of F2, F3 and F4 generations in the two Egyptian cotton crosses i.e., cross I [({Giza 89 x Giza 85} x {Giza 86 x Giza 81}) x ({Giza 83 x Giza 80} x Giza 89)] and cross II [(Giza 85 x Giza 86) x ({Giza 83 x Giza 80} x Giza 89)]. The F2, F3 and F4 generations in the two crosses were grown at Sakha Experimental farm, Cotton Research Institute, Agricultural Research Center, Egypt during 2008, 2009 and 2010 seasons, respectively. The mean squares obtained from analysis of variance showed highly significant (P≤0.01) differences for most studied traits of F2, F3 and F4 generations in the two crosses. For the two crosses, the best mean values for boll weight (3.27 and 3.39 g) and 2.5% span length (33.22 and 32.84 mm) traits were detected in F4 generation, seed cotton yield/plant (175.88 and 197.09 g) and uniformity index (87.01 and 86.54 %) traits in F3 generation and fiber fineness (3.75 and 3.63) in F2 generation. While, lint percentage (40.68 and 41.39 %) and fiber strength (10.32 and 10.44 g/tex) traits exhibited highest mean values of the crosses I and II in F4 and F3 generations, respectively. In general the magnitude of genotypic correlation coefficient was higher than those of phenotypic correlations coefficient of most studied traits for F2, F3 and F4 generations in the two crosses. Seed cotton yield for the two crosses exhibited positive and highly significant associations with lint percentage, 2.5% span length, fiber fineness and fiber strength traits in F2 generation and with lint percentage and 2.5% span length traits in F3 and F4 generations, while, the correlation changed for fiber fineness and fiber strength in F3 and F4 generations. 2.5% span length, fiber fineness, fiber strength and uniformity index for the two crosses in F2, F3 and F4 generations had a highly significant positive correlations with boll weight. Lint percentage showed positive and highly significant associations with fiber fineness for F3 generation in the cross I and with fiber fineness and strength traits for the three generations in the cross II. These results indicating that, the two crosses could be used in improving yield and fiber quality in Egyptian cotton.
phenotypic correlation
genotypic correlation
analysis of variance and F2
F3 and F4 generations
2012
09
01
2425
2438
https://jpp.journals.ekb.eg/article_84989_4ce91a7af2dd281a1b10a473ad8c7906.pdf
Journal of Plant Production
2090-3669
2090-3669
2012
3
9
PERFORMANCE STUDY OF SOME SUGAR BEET VARIETIES UNDER SOWING AND HARVESTING DATES.
M.
Aly
Two field experiments were carried out Sakha Agricultural Research Station, Kafr El-Sheikh Governrate, during 2009/2010 and 2010/2011 seasons to evaluate three sugar beet varieties ( Kawemira, Carolla and Farida) under two sowing dates (15th October and 15th November), and two harvesting dates (180 and 210 days from sowing date). Results can be summarize as the following:
1. Sowing sugar beet on 15th Oct. attained the highest values of root length and diameter, root and top fresh weight/plant, sucrose %, Total Soluble Solids %, purity %, root and sugar yields t/fed.
2. Sugar beet vaieties were differed in the stydied characters: Carolla variety was superior in root and top fresh weight/plant, sucrose %, TSS %, purity %, root and sugar yields/fed.
3. Delaying harvest date up to 210 days from sowing gave the highest root dimension (length, diameter), root fresh weight/plant, root yield/fed and the best quality (sucrose %, TSS %) root and sugar yields/fed.
4. A significat interaction between sowing dates and harvesting dates gave the highest values of sucrose %, root and sugar yields/fed in both seasons, root diameter in the first season and total soluble solids in the second season only.
5. Results cleared that significantly interaction between harvesting dates and varieties in root fresh weight/plant Carolla variety gave the highest value of root fresh weight/plant at harvesting date 180 days from sowing.
Generally, it could be recommended that sowing sugar beet variety Carolla on 15th Oct. with delaying harvesting date up to 210 days from sowing under Kafr El-Sheikh conditions to obtain the higher sucrose % and root and sugar yields/fed.
2012
09
01
2439
2449
https://jpp.journals.ekb.eg/article_84990_78964489fc0938c7a554d6115b640883.pdf
Journal of Plant Production
2090-3669
2090-3669
2012
3
9
PRODUCTIVITY IMPROVEMENT OF COWPEA UNDER DESERT SOIL CONDITIONS
R.
Ghodia
Two field experiments were carried out in sandy soil during the summer seasons of 2003 and 2004at Siwa Oasis, Egypt (26.0°N, 29.0°E and 0-22 m under mean sea level). The experiments were irrigated by using drip irrigation system with salinity water of 6000 p.p.m),
Cowpea, Vigna unguiculata cv. Cream 7 cultivar was cultivated to study the effect of inoculation by three methods ( inoculation of seeds pre-sowing, as soil application by injection of inoculation after germination and with both methods on the growth and yield of cowpea. There were four inoculation treatments represented in new strain of Rhizobia (Rh), Bacillus megatherium phosphate dissolving bacteria (P. D. B.) and mixed inoculation (Rh + P. D. B.) in addition to control. The data were recorded for vegetative growth characteristics (plant height (cm), No. of branches, fresh and dry weight/ plant (g) and leaf area (cm2)). Also, dry pods yield and its components (No. of pods/plant, average pod weight (g), seeds number / pod, seeds yield (g)/plant and (kg)/fed.). Chemical constituents of dry seeds (N %, P %, K %, protein % and carbohydrate %) were determined.
Obtained results showed that inoculation of seeds pre-sowing and inoculation of soil after germination together surpassed than other methods in growth characters, yield and its components as well as chemical composition. The same trend was observed for the inoculation with Rh + P. D. B. treatment when compared to other inoculation treatments. The highest values of growth characters, yield and its components and chemical composition of cowpea (Cream 7 cultivar) were obtained with interaction treatment between inoculation of seeds pre-sowing and inoculation of soil after germination and Rh + P. D. B inoculation . The results were true in the two growth seasons.
Cowpea
Vigna unguiculata cv. Cream 7
methods of inoculation
Injection
Rhizobia (Rh)
Bacillus megatherium ( PD B)
Growth
yield and chemical composition
2012
09
01
2451
2463
https://jpp.journals.ekb.eg/article_84991_5d968d75cf28009e2213308d1d96831d.pdf
Journal of Plant Production
2090-3669
2090-3669
2012
3
9
RESPONSE OF SWEET PEPPER PLANTS (VEGETATIVE GROWTH AND LEAF CHEMICAL CONSTITUENTS) TO ORGANIC, BIOFERTILIZERS AND SOME FOLIAR APPLICATION TREATMENTS.
K.
Dawa
H.
Abd El - Nabi
W.
Swelam
This investigation was conducted in the two successive summer seasons of 2010 and 2011 on sweet pepper plants "Madir" hybride at a private farm at Sahragt El-Soghra near Mansoura, Dakahlia Governorate, Egypt to study the effect of two sources of organic fertilizers (chicken manure and compost), biofertilizers (a mixture of Azotobacter chroococcum and Bacillus circulans bacteria and Mycorrhiza fungi), some foliar application treatments (seaweed extract, yeast extract and humic acid) and their interaction on vegetative characteristics and chemical constituents of leaves.
Results indicated that the highest values of vegetative parameters, i.e., plant height, number of leaves, number of branches, leaf area, fresh and dry weights as well as chemical constituents of leaves, i.e., chlorophylls (Chl. a, Chl. b and total Chl. a+b), N, P and K percentages were recorded when plants supplied with chicken manure at 2.43 ton/fed. as compared with compost in the two seasons. Plants in the presence of biofertilizers recorded better growth performance and higher values of chemical composition in leaves than untreated plants in the two seasons.
Comparing the effect of foliar applications, seaweed extract at 2.5 ml/L or yeast extract at 5 g/L recorded the highest significant values of most formentioned parameters compared with the control in both seasons. in addition, spraying humic acid at 1.5 ml/L came in the second order and significantly increased number of branches, fresh and dry weights in both seasons and leaf area in the second season as compared with the check treatment.
The best results of both vegetative parameters and chemical constituents were recorded when plants fertilized with chicken manure at 2.43 ton/fed. and sprayed with either seaweed extract at 2.5 ml/L or yeast extract at 5 g/L in the presence of biofertilizers in both seasons. Therefore, this treatment could be recommended for improving sweet pepper performance under similar conditions of this study.
sweet pepper
chicken manure
compost
biofertilizers
foliar application
seaweed extract
yeast extract
Humic acid
Vegetative growth
Chemical composition
2012
09
01
2465
2478
https://jpp.journals.ekb.eg/article_84992_c25ae178897eca0084110dc6c4106c8e.pdf
Journal of Plant Production
2090-3669
2090-3669
2012
3
9
RESPONSE OF SOME FABA BEAN CULTIVARS TO DIFFERENT LEVELS OF PHOSPHORUS FERTILIZER WITH INOCULATION BY PHOSPHORUS SOLUBILIZING FUNGI
E.
Abbas
M.
El-Metwally
M.
Mohamed
Phosphorus ( P) is considered limiting factor for growth and productivity of legume crops . Two field experiments were conducted at the experimental Farm of Tag El- Ezz Station, Dakahlia Governorate ,Egypt during 2010/2011 and 2011/2012 seasons, to study the productivity of three faba bean cultivars namely ( Sakha 1, Nubria 1 and Giza 843) under three phosphorus levels, i.e. (15.5, 23.25 and 31Kg P2O5/fad.)with three types from solubilizing phosphate fungi ,i.e. ( Aspergillus Oryza, Aspergillus Niger and Penicillium Purpurogenum ). The results indicated that there were significant differences among the tested varieties in most characters studied in both seasons and combined analysis. Sakha 1 gave the highest values of nodules and root weight compared with other cultivars. Adding super phosphate at the rate of 31 kg P2O5 gave the highest values of nodules and roots weight compared with the other phosphorus levels and using fungi A .Niger recorded increase in nodules and root weight after 45 and 60 days from sowing in both seasons. On the other hand, growth and yield attributes as well as seed yield /fad. were significantly increased with the increase of phosphours level from 15.5 to 31 kg P2O5/fad. Inoculation faba bean seeds with A. Niger and A. Oryza gave the highest values for seed yield and yield attributes for all faba bean varieties in both seasons and combined analysis . on the other hand Sakha 1 produced the highest seed yield .( 8.18, 8.28 and 8.23 ardab/fad.) compared with 7.83 ,8.03 and 7.93 ardab/fad. for Nubria 1 and (8.02,8.25 and 8.15 ardab/fad.) for Giza 843 in both seasons and combined analysis respectively. The results obtained revealed that , there are significant differences in P% values , between studied cultivars , Sakha 1 gave the highest values compared with the other cultivars . On the other hand, adding 31 Kg P2O5 and the inoculation with A. Niger gave the highly significantly P% in roots and shoots in both seasons . Also the interactions effect between all studied factors on P% in root and shoot are highly significantly in both seasons
Faba bean
nodulation
inoculation
Phosphours
phosphorus solubilizing fungi and Phosphorus percentage
2012
09
01
2479
2494
https://jpp.journals.ekb.eg/article_84993_b846867e197c8f50b5864b42b0bfc152.pdf