摘要
为了揭示不同灌溉方式下果园土壤氧气分布特征,以7年生矮砧苹果树为试验对象,设置灌溉方式(蓄水坑灌、地面灌溉)作为控制因子,采用土壤原位氧气测定仪对距离地表不同垂向位置处和距离树干不同径向位置处土壤氧饱和度进行了监测。结果表明:不同灌溉方式下土壤氧饱和度随垂向深度增加均呈现指数型递减趋势;蓄水坑灌下土壤氧饱和度随径向距离增加呈现“几”字形变化趋势,地面灌溉方式下土壤氧饱和度在径向变化不大,基本稳定于一常数,蓄水坑灌处理沿垂向和径向土壤氧饱和度均高于地面灌溉处理。在此基础上,构建了地面灌溉一维垂向指数型分布模型,模型决定系数为0.903~0.916;蓄水坑灌一维垂向、一维径向和二维空间指数型分布模型,模拟决定系数分别为0.872~0.983、0.605~0.814和0.890,均具有较高的模拟精度。
In order to reveal the oxygen distribution characteristics of orchard soil under different irrigation methods,the 7-year-old dwarf anvil apple tree was used as the experimental object,and the irrigation method(water storage pit irrigation,surface irrigation)was set as the control factor,and the soil oxygen saturation at different vertical positions from the surface and radial positions from the tree trunk was monitored by the soil in situ oxygen analyzer.The results showed that the soil oxygen saturation increased exponentially with the increase of vertical depth under different irrigation modes;the soil oxygen saturation under the water storage pit showed a trend of“several”shape with the increase of radial distance,while under surface irrigation,the soil oxygen saturation showed little change in the radial direction and was basically stable at a constant;The soil oxygen saturation in the vertical and radial directions under water storage pit irrigation treatment was higher than that under the surface irrigation treatment.On this basis,a one-dimensional vertical exponential distribution model of surface irrigation was constructed.The model determination coefficient was 0.903~0.916.The 1-d vertical,1-d radial and 2-d spatial exponential distribution models of pit irrigation had higher simulation accuracy,with the simulation coefficients of 0.872~0.983,0.605~0.814 and 0.890,respectively.
作者
路明杰
郭向红
雷涛
雷震
孙西欢
马娟娟
张少文
LU Ming-jie;GUO Xiang-hong;LEI Tao;LEI Zhen;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, China)
出处
《节水灌溉》
北大核心
2020年第4期6-10,共5页
Water Saving Irrigation
基金
国家自然科学基金资助项目(51579186、51109154)
山西省自然科学基金资助项目(201601D011053)。
关键词
土壤氧气
蓄水坑灌
地面灌溉
空间分布
soil oxygen
water storage pit irrigation
surface irrigation
spatial distribution
