摘要
为探索草原干旱对牧草生物量造成损失的评估方法,以内蒙古扎鲁持旗北部的巴雅尔图草原为例,利用水分亏缺量作为内蒙古草原干旱评估指标,建立不同生长阶段牧草生物量损失评估模型。结果表明,牧草生物损失量与牧草返青期、旺盛生长期的水分亏缺量有着显著的Logistic曲线关系。依此确定了不同干旱等级相对应的牧草生物损失量,以满足草原干旱监测与灾损评估需要。
In order to study the evaluation method of grassland drought on pasture biomass loss, the article took Bayaertu grassland as an example, used the water deficit as Inner Mongolian grassland drought evaluation index, and established a loss evaluation model for pasture biomass on different growth stages. The result showed that there was significant Logistic curve relationship between biomass loss and the quantity of water deficit in grass turning green stage and vigorous growth stage. Integrated with pasture biomass reduction, ascertained the pasture biomass lose corresponding of different drought grades finally. This was suitable for the need of grassland drought monitor and disaster loss evaluation.
出处
《草业科学》
CAS
CSCD
北大核心
2009年第5期32-37,共6页
Pratacultural Science
基金
国家社会公益研究专项基金项目(2004DIB4J170)
关键词
草原干旱
水分亏缺量
牧草损失量
grassland drought
the water deficit
pasture biomass loss
