覆膜垄沟集雨种植对老芒麦生长发育的影响  

Effects of Rainwater Harvesting with Plastic-covered Ridge and Furrow on Growth and Development of Elymus sibiricus L.

作　　者：李春荣[1,2] 苏德荣[2] 何峰[1] 何丹[1] 李向林[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：《中国草地学报》2010年第2期25-31,共7页Chinese Journal of Grassland

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,提高了沟内表层土壤含水量,同一深度总体表现出MR60>MR30>CK的规律,同一处理内随着土壤深度的增加土壤含水量逐渐降低。老芒麦生育期内,处理内高度差异显著,MR60和CK相比株高提高33.5%～61.3%,MR30和CK相比株高提高20.1%～44.1%;MR60、MR30与CK三者在密度方面差异不尽相同,在8月上旬之前MR30与CK差异不显著,但均与MR60差异显著,密度动态变化和单株分蘖数变化保持一致;在草产量方面,各个处理之间差异均显著,M60处理鲜、干草产量分别达到15988kg/hm2、4196 kg/hm2,与CK相比分别提高了105%和96%;M30处理老芒麦鲜、干草产量分别为11497 kg/hm2、2824kg/hm2,与CK相比分别提高48%和32%。The effects of rainwater harvesting with ridge and furrow on growth and development of Elymus sibiricus L.were studied in northern farming-pastoral zone of China.The results showed that rainwater harvesting with plastic-covered ridge and furrow can make the limited rainfall accumulated in the furrow,enhance the soil water content of surface layer.At the same depth the soil water content in MR60 was higher than that in MR30,and the MR30 was higher than CK.Within the same treatment,the soil water content gradually decreased with the increase of depth.In the whole growing season of Elymus sibiricus L.,the differences in height among treatments were significant（P〈0.05）,the height in MR60 was increased by 33.5%-61.3% compared with CK,and MR30 was increased by 20.1%-44.1%.The differences in density between MR60,MR30 and CK were different,before 10th,August,the difference in density between MR30 and CK was not significant,but the difference in density between MR60 and CK was significant,density dynamics kept the same pace with the variation of average tillering number.As to the forage yield,the differences among treatments were significant（P0.05）,the fresh forage yield and hey yield of MR60 amounted to 15988kg/hm^2,4196kg/hm^2,increased by 105% and 96% respectively compared with CK;the fresh forage yield and hey yield of MR30 were 11497kg/hm^2 and 2824kg/hm^2,increased by 48% and 32% compared with CK respectively.

关 键 词：农牧交错区 垄沟集雨 老芒麦 土壤含水量 

分 类 号：S543[农业科学—作物学]