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《Journal of Drainage and Irrigation Machinery Engineering》 2017-11
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Effect of pit depth and irrigation volume on growth of young apple tree in quick growth stage of new branches in water storage pit irrigation

LI Rui;GUO Xianghong;SUN Xihuan;MA Juanjuan;ZHENG Lijian;AN Jianglong;ZHANG Yaxiong;School of Hydraulic Science and Engineering,Taiyuan University of Technology;Jinzhong University;  
Three-year-old dwarf apple trees were selected as the study object in this experiment,and influences of pit depth and upper and lower limits of irrigation volume on their growth during the quick growth stage of new branches were studied. Meanwhile,each treatment has been evaluated by principal component analysis. The results show that the root system growth,leaf photosynthetic properties,morphological and physiological characteristics of young apple trees are better at 40 cm pit depth than thoseat the other pit depths( 20 cm and 60 cm) when the upper and lower limits of irrigation are 60% —90% of field capacity under the condition of considering the total irrigation volume. At 40 cm pit depth,except the root system growth index,the other morphological and physiological indices of young apple trees are significantly better when the upper and lower limits of irrigation are 70% —100% of field capacity than those when two limits are 50% —80% and 60% —90% of field capacity. By using principal component analysis,the influences of pit depth and upper and lower limits of irrigation are scored comprehensively. It is found that 40 cm pit depth and upper and lower limits at 60% —90% of field capacity level are the optimal combination. Therefore,in water storage pit irrigation,a suitable irrigation condition can considerably promote the root system to grow,and strength the drought resistance of young apple trees,eventually both water saving and high yield purposes can be achieved.
【Fund】: 国家自然科学基金资助项目(51579168);; 山西省科技攻关项目(20140311016-6);; 山西省自然科学基金资助项目(201601D011053);; 山西省高等学校创新人才支持计划项目
【CateGory Index】: S661.1
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