| Study on the coupling effect of water and fertilizer on apple in hilly area of Loess Plateau |
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| DOI：10.7606/j.issn.1000-7601.2004.01.34 |
| Key Words: coupling effect of water and fertilizer yield WUE net income |
| Author Name | Affiliation | | ZHU De-lan | College of Resources and Environment, Northwest Sci-tech University of Agriculture and Forestry, Yangling, Shaanxi 712100, China | | WANG Wen-e | College of Resources and Environment, Northwest Sci-tech University of Agriculture and Forestry, Yangling, Shaanxi 712100, China | | CHU Jie | College of Resources and Environment, Northwest Sci-tech University of Agriculture and Forestry, Yangling, Shaanxi 712100, China |
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| Abstract: |
| Based on the water resource and fertilizer application situation in the hilly areas of Loess Plateau, an experiment was conducted on investigate the coupling effect of water and fertilizer on apple with the trial fctors of fertilizer, proportion (A) fertilizer application rate (B), irrigation amount (C) and irrigation period (D). The effects of water and fertilizer on yield, water use efficiency and increase rate of net income were analyzed. The results showed that the importance sequence of the four factors on yield and WUE was: fertilizer application rate (B), irrigation period (D), fertilizer proportion (A) and irrigation amount (C). The importance sequence on increase rate of net income was: fertilizer proportion (A), fertilizer application rate (B), irrigation period (D) and irrigation amount (C). The optimum measure was A1B3C2D1, namely, N∶P∶K=1∶1∶2, fertilizer application per tree being 0.6 kg, irrigation period being wintering + pre-blooming + early fruit-setting + inflating stage, and irrigation quota being 82.5 m3/hm2. Fertilizer was more important to apple trees than water, and K was the most deficient element in the soil of apple orchard. |
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