辽北风沙区牧草需水规律的研究  

Study on water requirement of pasture in Northern Liaoning sandy area

作　　者：刘世国 LIU Shiguo(Agriculture and Rural Affairs Bureau of Beipiao City,Chaoyang 122100,China)

机构地区：[1]北票市农业农村局,辽宁朝阳122100

出　　处：《水利科学与寒区工程》2021年第5期73-77,共5页Hydro Science And Cold Zone Engineering

摘　　要：为探究辽北风沙区牧草的耗水规律,制定合理的灌溉制度,设置微喷灌溉和不灌溉两个处理,研究微喷灌溉对苜蓿的生长及产量、不同土层深度土壤含水率、生育期内耗水量及水分生产率的影响。结果表明:微喷灌溉提高了表层土壤含水率,促进了苜蓿生长,增产效果较雨养不灌溉处理明显。在微喷灌溉条件下,苜蓿的灌溉定额为:分蘖分枝期、开花现蕾期、灌浆期各灌溉1次,成熟期灌溉3次,单次灌溉水量以土壤田间持水率的相对含水率作为依据,灌溉下限为田间持水率的60%,上限为田间持水率的90%,全生育期灌溉定额约为375 mm,即3750 m^(3)/hm^(2)。In order to figure out the water consumption law of pasture in the sandy area of northern Liaoning Province and to establish a reasonable irrigation system,two treatments,micro-spraying irrigation and non-irrigation,were set up.The effects of micro-sprinkler irrigation on alfalfa growth and yield,soil water content in different soil depth,water consumption and water productivity were studied.The results showed that MSI increased the surface soil moisture content and promoted the growth of alfalfa.The effect of increasing production was more obvious than that of no irrigation.Under micro-sprinkler irrigation,the irrigation quota for alfalfa is:each in the tillering and branching period,flowering and budding period,and filling period irrigate1 time,and in the mature period irrigate 3 times.The single irrigation water volume was based on the relative water content of the soil field water holding rate,the lower limit of irrigation was 60 of the field water holding rate,the upper limit was 90%of the field water holding rate,and the irrigation quota for the whole growth period was about 375 mm,that was 3750 m^(3)/hm^(2).

关 键 词：苜蓿 微喷灌溉 耗水规律 水分生产率 

分 类 号：S275[农业科学—农业水土工程]