草业学报2011，Vol.20Issue(3)：20-27,8.
祁连山北坡天然草地地上生物量及其与土壤水分关系的比较研究
Above-ground Biomass and its relationship to soil moisture of Natural Grassland in the Northern Slopes of the Qilian Mountains
摘要
Abstract
Based on the research on the above-ground biomass of natural grassland: alpine pastureland, mountainous meadow, mountainous meadow rangeland, mountainous pastureland, mountainous desert rangeland in the northern slopes of the Mountains Qilian, the results showed that the difference of aboveground biomass among five grassland was significant (P＜O. 05), but the curve of seasonal dynamic of aboveground biomass was single apex type and variation trend were same, and it reached the peak value in August. The above-ground biomass of mountainous meadow (100.24 g/m2) is the highest in five vegetation types, and others are in order of mountainous meadow rangeland (71.24 g/m2), mountainous pastureland (70.20 g/m2), alpine pastureland (52.40 g/m2), and mountainous desert rangeland (20.44 g/m2). The result of the Logistic model of aboveground biomass growth curve showed that all grassland types did not reach its maximum the environment can support. The above-ground biomass of different type grassland positively correlated to the accumulated value of precipitation and mean soil moisture. Soil moisture of different soil layers had different impact on the aboveground biomass, but the soil moisture within root distributed soil layers had same impact on aboveground biomass in all grasslands (P＜0.05).关键词
祁连山/天然草地/地上生物量/土壤水分Key words
Mountains Qilian/ natural grassland/ above-ground biomass/ soil moisture分类
农业科技引用本文复制引用
黄德青,于兰,张耀生,赵新全..祁连山北坡天然草地地上生物量及其与土壤水分关系的比较研究[J].草业学报,2011,20(3):20-27,8.基金项目
国家科技支撑计划项目(2009BAC61B03-1,2006BAC01A02),中国科学院西部行动计划项目(KZCX2XB20601),中国科学院知识创新工程重大项目(kzcx1-09-01)和中国科学院西北高原生物研究所知识创新重点研究领域项目(cjc020144)资助. （2009BAC61B03-1,2006BAC01A02）
