摘要
介绍了内蒙古自治区和青海、新疆省的草地干旱指标研究。通过对大量历史资料的统计分析得出0～30cm深土壤层的相对湿度与相对蒸降差这两个物理量,与牧草生长发育及产草量有密切的关系。三省、自治区分别以土壤相对湿度与相对蒸降差为指标,对草甸草原、典型草原、荒漠草原进行了干旱等级划分和检验,结果较为满意。
This paper describes the study on indices for grassland drought in Inner Mongolia Autonomous Region and Xinjiang/Qinghai Provinces.Though analyzing a lot of historical meteorological data,it is shown that both the rela- tive moisture of soil in 0～30 cm depth and the relative difference between evapotranspiration and rainfall relates closely to the growth and yield of grass.The grades of drought of meadow grasslands,typical grasslands and deserti- fled grasslands are respectively divided by using the relativ...
出处
《自然灾害学报》
CSCD
北大核心
2006年第S1期270-275,共6页
Journal of Natural Disasters
基金
内蒙古草原干旱的监测预测研究(2004D1B4J170)
关键词
干旱指标
土壤相对湿度
相对蒸降差
drought index
relative soil moisture
relative difference between evapotranspiration and rainfall
