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高寒半干旱区油菜牧草混播草地土壤环境效应

标题: 高寒半干旱区油菜牧草混播草地土壤环境效应
英文标题: EFFECTS OF RAPE LEGUME-GRASS MIXED PASTURES ON SOIL IN COLD SEMI-ARID REGION WITH HIGH ELEVATION
作者: 王殿武,文振海,文宏达,谢建治,刘文菊
英文作者: WANG DIAN WU,WEN ZHEN HAI,WEN HONG DA,XIE JIAN ZHI,LIU WEN JU
出版时间: 1999-01-01
机构: 河北农业大学
关键词: 混播草地,土壤环境效应,水分利用效率,高寒半干旱区
英文关键词: MIXTURE PASTURE,SOIL ENVIRONMENT EFFECT,WATER USE EFFICIENCY,COLD SEMI ARID REGION WITH HIGH ELEVATION
刊名: 草业学报
英文刊名: ACTA PRATACULTURAL SCIENCE
ISSN: 1004-5759
卷号: 004
基金: ^A国家科技支撑计划项目^B96-004-04-03^D1
页码: 1-9
分类号: S812.2
摘要: 从土壤物理、化学、生物等方面系统地研究了油菜、豆科禾本科牧草混播人工草地土壤环境效应.干旱年型(生长季降水167.5 m m )混播草地至开花盛期土壤贮水量高于天然草地,之后呈降低趋势;丰水年型(生长季降水355.9 m m )土壤贮水量均高于天然草地,1 m 土体贮水量增加5.7~67.6 m m .土壤盐分表聚性特征明显,混播草地改善土壤盐分状况显著,耕层和1 m 土体含盐量分别较天然草地降低0.31~6.00g/kg和0.12~1.21 g/kg.混播草地肥力状况改善,速磷和有机质含量增加,而速氮、全氮、全磷含量则呈降低趋势,磷酸酶和H2O2 酶活性增强,脲酶活性下降;> 0.25m m 水稳性团聚体含量提高6.03%.,结构系数、团聚度提高,改善了土壤结构状况,增大了土壤持水能力.混播草地地上部干物质和粗蛋白产量明显增大,较天然草地分别提高17.8%~319.1%和27.9%~316.1%,其生物产量和水分利用效率分别较天然草地提高477.1%和15.2 kg/(m m ?hm 2),建植混播人工草地,显著提高生物产量和水分利用效率.
英文摘要: The effects of rape alfalfa wild ryegrass mixture on major physical, chemical and biological characters of soil were studied in Zhangbei county of Hebei province. It was shown that in a dry year with 167.5 mm rainfall during the growing season, the water storage capacity of the soil under the mixture was higher than that of the soil under the native pastures until the flowering stage of the mixture; and in a year with 355.9 mm rainfall, the water storage capacity of the former kept higher than the latte...