覆膜垄沟集雨种植对老芒麦高度和密度的影响  

The effect of water harvesting planting with mulched ridges on height and density of Elymus sibiricus L. in semi-arid area

作　　者：李春荣[1,2] 苏德荣[2] 李向林[1] 何峰[1] 万里强[1] 

机构地区：[1]中国农业科学院北京畜牧兽医研究所,北京100193 [2]北京林业大学省部共建森林培育与保护教育部重点实验室,北京100083

出　　处：《草业科学》2010年第3期82-88,共7页Pratacultural Science

基　　金：公益性行业(农业)科研专项(NYHYZX07-022);国家科技支撑计划(2006BAD16B05)

摘　　要：研究了北方农牧交错区垄沟集雨种植措施对老芒麦Elymus sibiricus生长发育的影响。覆膜垄沟集雨种植可以使有限降雨在沟内富集累加，垄面径流效率达到80％左右。老芒麦2008和2009年营养生长阶段，处理间高度差异显著。2008年处理1和CK相比，株高提高33．5％～61．3％；处理2和CK相比，株高提高20．1％～44．1％，处理1与处理2相比，株高提高9．2％～16。2％。2009年处理1与CK相比，株高提高93．2％～116．4％；处理2与CK相比，株高提高65．4％～82．3％；处理1与处理2相比，株高提高12．1％～19．4％。处理1、处理2与CK三者在密度方面差异不尽相同，总体表现出处理2和处理1老芒麦密度高于CK，2008年密度动态变化和单株分蘖数变化保持一致，2009年返青后，呈现出整体略微下降趋势，趋于稳定。The paper studied the effect of rainwater harvesting planting measure with mulched ridges on growth and development of Elymus sibiricus L. in northern agriculture-animal husbandry ecotone. It suggested that rainwater harvesting with mulched ridges could make the limited rainfall converged abundantly in the furrow, and the efficiency of ridge surface running amounts to about 80 %. In vegetative growth stage of E. sibiricus L. in 2008 and 2009, the differences of the height in treatments were significant respectively （P〈0.05）. In 2008, the plant height in MR60 increased by 33.5%- 61.3% compared with CK, MR30 increased by 20. 1% -44.1% compared with CK, and MR60 increased by 9.2% -16.2% compared with MR30. In 2009, the plant height in MR60 increased by 93.2%-116.4% compared with CK, MR30 increased by 65.4% -82.3% compared with CK, and MR60 increased by 12.1%-19.4% compared with MR30. The differences of density among MR30, MR60 and CK were not significant, but the MR30 and MR60 both were higher than CK, generally. Density dynamics kept the same pace with the variation of average tillers in 2008, the density wholly decreased slowly and tended to stable after turning green in 2009.

关 键 词：农牧交错带 垄沟集雨 老芒麦 土壤含水量 

分 类 号：S543.904.7[农业科学—作物学]