摘要
国立草地研究所位于日本中部的西那须地区,在其所辖人工草地的放牧试验区内,进行了以下实验:(1)研究不同放牧压对地下生物量的影响(1974-1981年),(2)研究不同施肥水准对地下生物量的影响(1982-1989年).在与上述相同的放牧样地内,除去了放牧条件的差异(以相同的放牧压和施肥水准),继续进行了5年的放牧试验(1990-1994).结果表明地下生物量(包括新鲜的根和地下茎)的季节和年度变化较大,呈现出随着放牧年限增加而年年递减的趋势.
In a grazing pasture of the National Grassland Research Institute, which was located at Nishinasuno area of Tochigi in Japan, the temporal changes in underground biomass were reported as the following grazing experiments: 1) How two different grazing intensities influence the underground biomass (1974-1981), and 2) How two different nitrogen application levels influence the underground biomass in the pasture ecosystem (1982-1989).The grazing experiments were continued from 1990 to 1994 in the above-mentioned grazing area,which were done at the same conditions (same grazing intensities and nitrogen application levels).The underground biomass showed noticeable differences among seasons and years and tended to decrease from year to year.
出处
《内蒙古大学学报（自然科学版）》
CAS
CSCD
北大核心
2004年第6期654-657,共4页
Journal of Inner Mongolia University：Natural Science Edition
基金
Sponsored by the Scientific Research Foundation for the Returned Overseas Chinese Schol-ars, State Education Ministry(2 0 0 4-1 76)
关键词
变量分析
放牧
氮肥
放牧草地
地下生物量
analysis of variance
grazing
nitrogen
pasture
underground biomass
