摘要
石生针茅荒漠草原生物量增大模式概括为S型曲线、秋季急增型曲线和双峰型曲线。生物量增长与降水量分配规律一致。将牧草当年可利用降水量划分为“生物学年度降水量”,克服了生长季降水量及气象学“年降水量”的缺陷,并以生物学年度降水量为依据建立了生物量预测模式,可用来预测年最高生物量。
The biomass of Stipa klemenzii eremo steppe differs yearly and summarized as a model“S”curre, autumn-rapid-increase curre or double-peak curre. Water is the main limit factor of this eremo steppe. The increase of biomass is in accordance with the regulation of precipitation atribution. We devide the available precipitation in to 'bio-annual-precipitetion' for herbs, then we can avoid the shortcomings of precipitation of meteorology. The models of biomass prediction are estiblished on the basis of bio-annual-precipitation which is more practical, especially in the equastion Y=-51. 52 + 2. 1339 x. There is an allowable error of 4. 23g/m2 on'iy, and 85. 9% precision, that can be used to predict the annual maximum biomass.
出处
《中国草地》
CSCD
1992年第4期10-14,共5页
Grassland of China
