蓄水坑灌坑深对土壤氧气分布的影响  

Distribution Characteristics of Soil Oxygen under Different Pit Depth Conditions in Water Storage Pit Irrigation

作　　者：雷震 郭向红[1] 雷涛[1] 路明杰 孙西欢[1,2] 马娟娟[1] 张少文[1] LEI Zhen;GUO Xiang-hong;LEI Tao;LU Ming-jie;SUN Xi-huan;MA Juan-juan;ZHANG Shao-wen(College of Water Resource Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China;Jinzhong University, Jinzhong 030600, Shanxi Province, China)

机构地区：[1]太原理工大学水利科学与工程学院,太原030024 [2]晋中学院,山西晋中030600

出　　处：《中国农村水利水电》2020年第9期40-44,48,共6页China Rural Water and Hydropower

基　　金：国家自然科学基金项目(51579186、51109154);山西省自然科学基金项目(201601D011053)。

摘　　要：为探究蓄水坑灌不同坑深条件下苹果树根区土壤氧气分布特征,以7 a生矮砧苹果树为试验材料,设置坑深作为控制因子,采用土壤原位氧气测定仪对距离树干不同径向位置处和距离地表不同垂向位置处的土壤氧气含量进行了测定。结果表明:不同坑深处理下土壤氧饱和度均随土壤深度增加呈现指数型下降趋势,随径向距离增加均呈现先上升后下降的趋势。在同一垂向和径向位置处,60 cm坑深处理土壤氧饱和度均高于40 cm坑深处理,且60 cm坑深处理对土壤氧饱和度的影响范围更广。在此基础上,建立了不同坑深处理下土壤氧饱和度一维垂向、一维径向和二维空间指数型分布模型,模拟效果较好。研究结果可完善蓄水坑灌理论,并为蓄水坑灌坑深选取提供理论指导。In order to explore the distribution characteristics of soil oxygen in the root zone of apple trees under different pit depths of water storage pit irrigation,7-year-old apple trees on dwarf stock are used as experimental materials and pit depths are set as control factors.The soil oxygen content at different radial positions from the trunk and different vertical positions from the surface of the earth is measured by the soil in-situ oxygen detector.The results show that the soil oxygen saturation decreases exponentially with the increase in soil depth and first increase and then decreases with the increase in radial distance.In the same vertical and radial position,the soil oxygen saturation of 60 cm pit depth treatment is higher than that of 40 cm pit depth treatment,and the influence range of 60 cm pit depth treatment on soil oxygen saturation is wider.Based on this,one-dimensional vertical,one-dimensional radial and two-dimensional spatial exponential distribution models of soil oxygen saturation under different pit depth treatment are established,and the simulation results are good.The research results can improve the theory of water storage pit irrigation and serve as a theoretical guide to the selection of the depth of water storage pit irrigation.

关 键 词：蓄水坑灌 氧饱和度 坑深 氧气分布 

分 类 号：TV93[水利工程—水利水电工程] S275.9[农业科学—农业水土工程]