应用生态学报2011，Vol.22Issue(3)：556-564,9.
黄土高原水蚀风蚀交错区植被地上生物量及其影响因素
Vegetation above-ground biomass and its affecting factors in water/wind erosion crisscross region on Loess Plateau
摘要
Abstract
Field investigations were conducted in Liudaogou small watershed in late September 2009to study the differences of vegetation above-ground biomass. soil moisture content. and soil nutrient contents under different land use patterns, aimed to approach the vegetation above-ground biomass level and related affecting factors in typical small watershed in water/wind erosion crisscross region on Loess Plateau. The above-ground dry biomass of the main vegetations in Liudaogou was 177-2207 g·m-2 , and that in corn field. millet field , abandoned farmland , artificial grassland, natural grassland , and shrub land was 2097 -2207 , 518 -775 , 248 -578 , 280 -545 , 177 -396 , and 372 -680 g·m-2, respectively. The mean soil moisture content in 0-100 layer was the highest (14.2％ ) in farmlands and the lowest (10.9％ ) in shrub land. The coefficient of variation of soil moisture content was the greatest ( 26.7％ ) in abandoned farmland. indicating the strong spatial heterogeneity of soil moisture in this kind of farmland. The mean soil water storage was in the order of farmland ＞ artificial grassland ＞ natural grassland ＞ shrub land. Soil dry layer was observed in alfalfa and caragana lands. There was a significant positive correlation ( r = 0. 639, P＜0. 05 ) between above-ground dry biomass and 0-100 cm soil water storage, and also, a very significant positive correlation between above-ground fresh biomass and vegetation height. The above-ground biomass of the higher vegetations could potentially better control the wind and water erosion in the water/wind erosion crisscross region. Vegetation above-ground biomass was highly correlated with soil moisture and nutrient contents, but had no significant correlations with elevation. slope gradient, slope aspect, and soil bulk density.关键词
地上生物量/盖度/土壤水分/群落特征/土壤侵蚀分类
生物科学引用本文复制引用
王建国,樊军,王全九,王力..黄土高原水蚀风蚀交错区植被地上生物量及其影响因素[J].应用生态学报,2011,22(3):556-564,9.基金项目
中国科学院、国家外国专家局创新团队国际合作伙伴计划项目(流域水土过程模拟)和中央高校基本科研业务费专项资金(Z109021004)资助. （流域水土过程模拟）
