石羊河流域喷灌不同灌水量对苜蓿生长、产量及水分利用效率的影响  

Effects of Different Irrigation Water Amounts under Sprinkler Irrigation on Growth,Yield and Water Use Efficiency of Alfalfain in Shiyang River Basin

作　　者：陶雪[1] 苏德荣[1] 寇丹[2] 

机构地区：[1]北京林业大学,北京100083 [2]中国科学院植物研究所,北京100093

出　　处：《灌溉排水学报》2015年第10期77-80,共4页Journal of Irrigation and Drainage

基　　金：国家863计划项目(2011AA100502);国家自然科学基金项目(51379011)

摘　　要：通过大田喷灌试验,研究了苜蓿生长适宜的灌水量。结果表明,喷灌条件下不同灌水处理苜蓿的生长、产量、水分利用效率与耗水量有极高的相关性(R2>0.97);随着灌水量增加,苜蓿生长越好,产量越高,当灌水量大于140mm时,苜蓿产量不再随灌水量增加而增加;苜蓿的水分利用效率随着耗水量的增加先增加后降低,灌水利用效率随耗水量的增加降低,差异均显著(P<0.05)。该研究揭示喷灌条件下140mm的灌水量不仅可以使石羊河流域苜蓿增产还可以节约水资源。Field sprinkler experiments were conducted to studythe suitable irrigation water amounts of alfalfa growth under sprinkler irrigation.The results showed that growth,yield and water use efficiency of alfalfa and water consumption had a very high correlation（R2〉0.97）under different irrigation amounts treatments;Alfalfa grew well and had the higher yield with increase of irrigation water amounts,but when irrigation water amounts were greater than 140 mm,alfalfa yield non-significantly increased with the increase ofirrigation water amounts;Water use efficiency of alfalfa firstly increased with increase of water consumption amounts,then decreased,and irrigation water use efficiency decreased with the increase of water consumption amounts（P〈0.05）.Irrigation water amounts of 140 mm can not only increase alfalfa yield but also save water.

关 键 词：苜蓿 喷灌 生长 产量 水分利用效率 

分 类 号：S541.9[农业科学—作物学]