
Effects of Different Drip Irrigation Belt Deployment Methods on Nutrient Distribution and Utilization Characteristics of Apple-Soybean Alley Cropping System
WAN Qian, WANG Ruoshui, XIAO Wan, LUO Chengwei, DOU Xiaoyu, WANG Lisha, XIONG Chang, WANG Xin, DAI Houshuai
Effects of Different Drip Irrigation Belt Deployment Methods on Nutrient Distribution and Utilization Characteristics of Apple-Soybean Alley Cropping System
To investigate the effects of different drip irrigation belt deployment methods on soil and plant nutrient distribution and utilization characteristics in an alley cropping system, a split-zone experiment was carried out to analyze the spatial distribution of soil nutrients, soybean yield, plant nutrient uptake and use efficiency in a typical apple-soybean intercropping system under different drip irrigation belt deployment. Three types of drip belt spacing (L1: drip belt at the root of each soybean row; L2: one drip belt every other soybean row; L3: two drip belts every three soybean rows) and two types of mulching (M1: white film and M0: without film) were applied. The results showed that mulching type and drip irrigation belt layout had significant effects on the distribution of soil nutrients (P<0.05). In the horizontal direction, the variation trend of soil nutrient content in different distances from tree rows showed “V” and “N” shape patterns. By means of the drip belt layout, soil water and fertilizer could be redistributed, hence to promote the niche separation and alleviate competition between the two species as well, which could further improve the nutrient uptake and utilization efficiency to increase the yield ultimately. The highest plant nutrient content and uptake and utilization efficiency were both achieved in the treatment of white film mulching with one drip irrigation belt every other soybean row layout, under which the highest yield was 1747.6 kg/hm2. The model could provide reference for alleviating the interspecific water-fertilizer competition in apple-soybean intercropping system.
alley cropping system / drip irrigation belt deployment / interspecific competition / soil nutrients / Loess Plateau of west Shanxi Province {{custom_keyword}} /
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