灌溉对华北农牧交错带无芒雀麦生物学特性的影响  

Effect of irrigation on morphological characteristics of Bromus inermis in semiarid agro-pastoral transitional zone of North China

作　　者：王琥[1] 李向林[1] 万里强[1] 王国良[1] 何峰[1] 

机构地区：[1]中国农业科学院北京畜牧兽医研究所,北京100094

出　　处：《草原与草坪》2007年第5期32-36,共5页Grassland and Turf

基　　金：国家科技攻关项目(2004BA528B-1-4);国家科技支撑计划项目(2006BAD16B05)资助

摘　　要：研究了河北坝上地区不同水分处理下无芒雀麦的生物学特性。结果表明,不同水分处理对无芒雀麦的植株高度、分蘖数、叶面积、地上和地下植物量等生物学特性均有不同程度的影响。在9月初刈割前,植株高度顺序为W3>W4>W2>W1,表明较多的灌水有利于植株的生长;叶面积大小顺序与植株高度变化规律相似,叶面积大小顺序为W4>W3>W2>W1,表明较多的灌水利于叶片的增大;对于分蘖数则相反,不同水分处理分蘖数顺序为W1>W2>W3>W4,灌水越多分蘖越少,说明整个生长季里适当的干旱可以促进分蘖;不同水分处理下地上植物量的大小次序为W2>W4>W3>W1,但无显著差异;不同水分处理根系重量的大小次序为W2>W1>W3>W4,说明适当干旱有利于无芒雀麦根系的生长。The effect of irrigation on morphological characteristics of Bromus inermis in semiarid agro-pastoral transitional zone of North China was studied. The results showed that the effect of irrigation on the plant height,leaf area, stem numbers, aboveground biomass and underground biomass was different. In the growth season,plant height of W1 was lowest and W3 was highest,that of W4 was higher than W2. The dynamics of leaf area was similar with the plant height,at the end of the growth season the order of leaf area was W4〉W3〉 W2〉W1. The order of stem numbers at the end of the growth season was W1〉W2〉W3〉W4, and the order of aboveground biomass was W2〉W4〉W3〉W1. The order of underground biomass was similar with the stem numbers,and that was W2〉W1〉W3〉W4.

关 键 词：灌溉 农牧交错带 无芒雀麦 生物学特性 

分 类 号：S543.071[农业科学—作物学]