摘要
为了制定春小麦的节水灌溉制度,在内蒙古河套灌区开展春小麦非充分灌溉田间试验,通过测定土壤含水率、春小麦生长及产量指标,研究非充分灌溉对土壤水分分布及春小麦生长的影响。结果表明:在0~100 cm土层内,灌溉水量为100%ETc(ETc为作物实际需水量)的充分灌溉和80%ETc的非充分灌溉的土壤含水率随着土层深度的增加而增大,60%ETc的非充分灌溉土壤含水率主要集中在亚表层土壤(20~40 cm)和中层土壤(40~60 cm)。灌溉水量为80%ETc的非充分灌溉对春小麦生长和产量指标的影响较小,与充分灌溉相比,降低5%~13%;灌溉水量为60%ETc的非充分灌溉对春小麦生长和产量指标影响较大,与充分灌溉相比,降低10%~37%。在研究区采用灌溉水量为80%ETc的非充分灌溉,生育期内灌溉定额为288 mm,对春小麦生长及产量的影响较小,可以达到节水灌溉的目的。
In order to provide theoretical basis for the establishment water-saving irrigation schedule for springwheat, a field experiment was conducted under deficit irrigation with spring wheat in Hetao irrigation area of InnerMongolia. The soil moisture content, spring wheat growth and yield index were measured for study the effects of irri-gation water amount on soil water distribution and spring wheat growth. The research results showed that in the 0~100 cm soil layer, the soil moisture content of 100% ETc sufficient irrigation and 80% ETc deficit irrigation in-creased with the increase of soil depth. The soil moisture content of 60% ETcdeficit irrigation was mainly concentrat-ed in subsurface soil layer(20~40 cm) and middle soil layer(40~60 cm). The deficit irrigation of 80% ETchad littleeffect on spring wheat growth and yield index. The spring wheat growth and yield index decreased by 5%~13% com-pared with 100% ETcsufficient irrigation. The deficit irrigation of 60% ETchad great effect on spring wheat growthand yield index. The spring wheat growth and yield index decreased by 10%~37% compared with 100% ETcsuffi-cient irrigation. The deficit irrigation of 80% ETcis recommended as a result of the spring wheat growth and yield de-creasing slightly in researching area, which can achieve the purpose of water-saving.
作者
周龄
ZHOU Ling(College of Resources and Environmental Sciences,Chifeng University,Chifeng 024000,China)
出处
《东北农业科学》
北大核心
2020年第5期28-32,共5页
Journal of Northeast Agricultural Sciences
基金
赤峰学院2018年度科研服务地方项目(cfxyfd201815)
赤峰学院服务赤峰市经济社会发展应用项目(cfxyfc201841)。
关键词
非充分灌溉
土壤水分分布
春小麦
生长
产量
Deficit irrigation
Soil water distribution
Spring wheat
Growth
Yield
