摘要
基于大田对比试验,研究了3种水分条件和覆盖处理对土壤水分、温度以及夏玉米地上部生长、产量、耗水量和水分利用效率的影响。结果表明,地膜和秸秆覆盖通过调节土壤水分和温度变化改善了夏玉米根区水热状况;3种水分条件下,地膜和秸秆覆盖增加了夏玉米地上部干质量和产量,提高了水分利用效率;中、低水分下2种覆盖方式的节水增产作用大于高水分;同一水分条件下,秸秆覆盖对土壤水热状况及夏玉米生长的影响效应随秸秆覆盖量的增加而增大。试验区土壤水分下限控制在65%FC、地膜覆盖或秸秆覆盖量7 500kg/hm2为宜。
The effects of different moisture conditions and mulching modes on soil moisture,soil temperature as well as summer maize aboveground growth,yield,water consumption and water use efficiency were studied by field comparison trials.The results showed that the hydrothermal regimes of summer maize root zone was improved under plastic film mulching（PM）and straw mulching（SM）by regulating soil moisture and soil temperature.The aboveground biomass and yield of summer maize were increased,and water use efficiency was improved as well by PM and SM under three moisture conditions.The water saving and yield increasing effects by PM and SM under medium and low moisture conditions were higher than those under high moisture condition.The effects of SM treatments on soil hydrothermal regimes and summer maize growth rose as straw-mulch amount increased under the same moisture condition.It was appropriate to control soil water low limit of 65%FCand use the plastic mulching mode or straw mulching of 7 500kg/hm2 at the same time.
出处
《灌溉排水学报》
CSCD
北大核心
2015年第2期25-28,60,共5页
Journal of Irrigation and Drainage
基金
公益性行业(农业)科研专项经费项目(201203077)
国家863计划课题(2011AA100502)
关键词
水分
覆盖
水热状况
夏玉米
生长
moisture； mulching； hydrothermal regimes； summer maize； growth
