Shahein,, A., EI- Sabrout, M., Yehia, M., Abd EI-Messeih, W. (2002). EFFECT OF DRIP IRRIGATION AND NITROGEN FERTILIZATION ON: 111- THE YIELD, FRUIT QUALITY AND SAVING WATER OF "ANNA" APPLE TREES GROWN IN NEW RECLAIMED SOILS. Journal of Plant Production, 27(4), 2431-2450. doi: 10.21608/jpp.2002.253995
A. H. Shahein,; M. B. EI- Sabrout; M. M. Yehia; W. M. Abd EI-Messeih. "EFFECT OF DRIP IRRIGATION AND NITROGEN FERTILIZATION ON: 111- THE YIELD, FRUIT QUALITY AND SAVING WATER OF "ANNA" APPLE TREES GROWN IN NEW RECLAIMED SOILS". Journal of Plant Production, 27, 4, 2002, 2431-2450. doi: 10.21608/jpp.2002.253995
Shahein,, A., EI- Sabrout, M., Yehia, M., Abd EI-Messeih, W. (2002). 'EFFECT OF DRIP IRRIGATION AND NITROGEN FERTILIZATION ON: 111- THE YIELD, FRUIT QUALITY AND SAVING WATER OF "ANNA" APPLE TREES GROWN IN NEW RECLAIMED SOILS', Journal of Plant Production, 27(4), pp. 2431-2450. doi: 10.21608/jpp.2002.253995
Shahein,, A., EI- Sabrout, M., Yehia, M., Abd EI-Messeih, W. EFFECT OF DRIP IRRIGATION AND NITROGEN FERTILIZATION ON: 111- THE YIELD, FRUIT QUALITY AND SAVING WATER OF "ANNA" APPLE TREES GROWN IN NEW RECLAIMED SOILS. Journal of Plant Production, 2002; 27(4): 2431-2450. doi: 10.21608/jpp.2002.253995
EFFECT OF DRIP IRRIGATION AND NITROGEN FERTILIZATION ON: 111- THE YIELD, FRUIT QUALITY AND SAVING WATER OF "ANNA" APPLE TREES GROWN IN NEW RECLAIMED SOILS
1Department of Pomology, Faculty of Agriculture, Alexandria University, Alexandria, Egypt
2Horticulture Research Institute, ARC, Giza, Egypt.
3Department of Pomology, Faculty of Agriculture, Alexandria University, Alexandria, Egypt.
Abstract
The present research was carried out in 1997 , 1998 , 1999 seasons on 5- years old "Anna" apple trees budded on MM. 106 rootstock and grown in a loamy sand soil at Desert Development Center (DOC) of the American University in Cairo (AUC) Sadat Research Station (SRS), EI-Menofeya Governorate. The objective of this work was to study the effect of four irrigation treatments and three nitrogen levels on the yield, fruit quality and saving irrigation water. The amount of irrigation water applied to each tested tree based on soil-matrix-potential in the three irrigation treatments (11 , 12 and b) , and the control treatment.
The main results can be summarized in the following points:
1- Fruit yield per tree was significantly lower in trees grown under low irrigation rate. The yield increased positively with increasing N level and irrigation rate.
2- Increasing irrigation rate as well as N level proportionally increased fruit weight, length and diameter.
3- The concentration of anthocyanin in fruit skin, fruit firmness, TSS% in fruit juice and the percentage of starch in fruits increased gradually with decreasing irrigation rate.
4- Increasing N level caused a significant decrease in fruit firmness and TSS% in fruit juice. On the other hand, the all used levels of nitrogen fertilization had no effect on anthocyanin concentration in the fruit skin and the percentages of total sugars, reducing sugars and starch in "Anna" apple fruits.
5- The percentage of juice acidity proportionally decreased with decreasing irrigation rate and N level.
6- The highest fruit yield was obtained from the trees grown under normal irrigation rate (11) at the end of present study (1999) although, in 1999 season, the latter irrigation treatment used less quantity of irrigation water (1934. 01 m3/feddan) than the control (2559.53 m3/feddan) through the entire season.
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