水土保持学报2017，Vol.31Issue(2)：117-121,232,6.DOI:10.13870/j.cnki.stbcxb.2017.02.021
膜下滴灌灌水量对土壤水热影响及地下水补给耗水响应
Changes of Soil Temperature and Water Supply from Groundwater to Crop Under Different Irrigation Amount with Drip Irrigation Under Plastic Mulch
摘要
Abstract
Drip irrigation under plastic mulch can effectively improve soil water and heat conditions,and increase crop yield.Moreover,change range of soil water,heat and crop yield as well as water supply from groundwater are maily effected by irrigation amount.To explore the effect of irrigation on soil and water consumption to groundwater recharge ratio of cotton in the growth period,four treatments with different irrigation amount(3 000 m3/hm2,3 750 m3/hm2,4 500 m3/hm2,5 250 m3/hm2)were conducted and the effects of irrigation amount on soil temperature and water supply from groundwater were investigated during the growth period of cotton by the balance plots.The results showed that,at a given irrigation amount,the shallow soil was more easily affected by the atmospheric temperature;under the same meteorological conditions,soil temperature and effective accumulated temperature at the same layer decreased with increasing irrigation amount,when the irrigation amount was increased by 75％,effective accumulated temperature decreased by 11.3％,while the temperature changes were relatively small;the greater the irrigation amount,the greater the water consumption of cotton and the amount of water in the groundwater supply.When the irrigation water was increased from 3 000 m3/hm2 to 5 250 m3/hm2,the water consumption of cotton increased by 146.3 ％,groundwater recharge rate increased by 540％,the water supply in the sensitive period of cotton increased by 152.93 mm,and the amount of groundwater recharge in the water sensitive period was the greatest,but daily groundwater recharge increased with the increase of cotton growth period,and the water use efficiency of each treatment was not significantly different.Furthermore,it was found that at the conditions of higher soil temperature in summer (flowering and boll opening stage) and the lower irrigation amount,the amount of water supply from groundwater in the night was greater than or close to that in the daytime.The results of this study will provide an effective basis for using agricultural water resources rationally and efficiently and optimizing the irrigation system of drip irrigation under plastic mulch.关键词
膜下滴灌/灌水量/地温/地下水补给Key words
drip irrigation under plastic mulch/irrigation amount/soil temperature/water supply from groundwater分类
农业科技引用本文复制引用
史文娟,何子建,徐飞..膜下滴灌灌水量对土壤水热影响及地下水补给耗水响应[J].水土保持学报,2017,31(2):117-121,232,6.基金项目
国家自然科学基金项目(51379173) （51379173）
陕西省教育厅重点实验室科研计划项目(16JS085) （16JS085）
