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冀西北高原油菜、苜蓿混播人工草地土壤水分动态研究

标题: 冀西北高原油菜、苜蓿混播人工草地土壤水分动态研究
英文标题: RESEARCH OF SOIL MOISTURE DYNAMIC ON THE RAPE-FORAGE MIXTURE PASTURE IN THE NORTH-WESTERN PLATEAU OF HEBEI.
作者: 王殿武,文振海,惠彦军,文宏达
英文作者: WANG DIANWU,WEN HONGDA
出版时间: 1997-01-01
机构: 河北农业大学
关键词: 混播草地,土壤水分动态,降水,利用效率
英文关键词: RAPE-FORAGE MIXTURE,\ SOIL MOISTURE DYNAMICS,\ PRECIPITATION USE EFFICIENCY
刊名: 中国草地
英文刊名: GRASSLAND OF CHINA
ISSN: 1000-6311
卷号: 004
页码: 30-33
分类号: S812.4
摘要: 1991~1994年在冀西北高原二阴滩地上对油菜、苜蓿混播人工草地土壤水分动态进行了研究.结果表明,人工草地生育期土壤水分季节变化分为春季返浆蒸发失墒期(3~5月)、夏季雨水下渗水分恢复期(6~8月)和秋季水分蒸发消耗期(9~10月);垂直变化可分为活跃层(0~40CM)、次活跃层(40~80CM)和水分相对稳定层(80CM以下).现蕾开花?结籽期耗水量占全生育期耗水量的58%,是牧草需水关键期.混播草地除当年生产466.5KG/HM2油菜籽外,还可平均生产较自然草场增长1.264倍的生物量,且显著地提高了降水利用效率
英文摘要: This paper studied the soil moisture dynamic on rape-forage mixture pasture in high land of the northwestern plateau of Hebei. The results showed that the seasonal variation of soil water of artificial grassland was divided into three periods which were the period of losing water with evaporation in Spring (from March to May), which included the instable melting stage (2 March to 8 April) and the stable melting stage (8 April to 30 April), the period of water restored with rain in Summer (from June to Augus...