Effect of different levels of irrigation water and nitrogen fertilizer on vegetative growth, yield and fruit quality of Valencia orange trees [electronic resource].

By: Contributor(s): Language: English Summary language: Arabic Description: p.761-773Other title:
  • تأثير مستويات مختلفة من ماء الرى والتسميد النيتروجينى على النمو الخضرى والمحصول وجودة الثمار فى أشجار البرتقال الفالنشيا [Added title page title]
Uniform titles:
  • Minufiya journal of agricultural research, 2013 V. 38 (3) Part 2 [electronic resource].
Subject(s): In: Minufiya journal of agricultural research 2013.v.38(3)P.2Summary: This study was carried out during 201012011 and 201112012 seasons under Gharbiya governorate conditions on ValenCia orange trees 16 years old, 5 x 5 meters apart and grown onto SoUr orange rootstock in clay soil. The experiment included 9 combinations treatments ofnitrogen at three rates, i.e., 600, 900 and 1200 gmltreelyear and irrigation at three levels, i.e., 8000, 4000 and 2800 m'/faddanlyear to study the effect of irrigation levels and nitrogen rates on growth, yield and fruit quality. The obtained results showed that; canopy volume, spring shoot length, leaves number and leaf area were significantly increased with increasing irrigation levels from 2800 to 8000 m' water /faddan / year and nitrogen rates from 600 to 1200 gm N / tree. Moreover, initial fruit set and final fruit set of Valencia orange trees were positively affected by irrigation, nitrogen fertilization and their combinations, also it decreased June fruit drop and perharvest drop. Yield as kgtfree or fruit numbers were significantly increased by raising the amount of nitrogen or water applied. In addition, weight, volume, juice volume, length, and diameter of the fruits were significantly increased by increasing irrigation levels from 2800 to 8000 m' water / faddan / year and nitrogen rates from 600 to 1200 gm N / tree, whereas peel thickness was significantly decreased.
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This study was carried out during 201012011 and 201112012 seasons under Gharbiya governorate conditions on ValenCia orange trees 16 years old, 5 x 5 meters apart and grown onto SoUr orange rootstock in clay soil. The experiment included 9 combinations treatments ofnitrogen at three rates, i.e., 600, 900 and 1200 gmltreelyear and irrigation at three levels, i.e., 8000, 4000 and 2800 m'/faddanlyear to study the effect of irrigation levels and nitrogen rates on growth, yield and fruit quality. The obtained results showed that; canopy volume, spring shoot length, leaves number and leaf area were significantly increased with increasing irrigation levels from 2800 to 8000 m' water /faddan / year and nitrogen rates from 600 to 1200 gm N / tree. Moreover, initial fruit set and final fruit set of Valencia orange trees were positively affected by irrigation, nitrogen fertilization and their combinations, also it decreased June fruit drop and perharvest drop. Yield as kgtfree or fruit numbers were significantly increased by raising the amount of nitrogen or water applied. In addition, weight, volume, juice volume, length, and diameter of the fruits were significantly increased by increasing irrigation levels from 2800 to 8000 m' water / faddan / year and nitrogen rates from 600 to 1200 gm N / tree, whereas peel thickness was significantly decreased.

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