宁夏天然草地气象环境质量与草地初级生产力的关系  

The Relationship Between Meteorological Environmental Quality and Primary Productivity of Natural Grassland in Ningxia

作　　者：王海霞[1] 王东云 孔强 陈艳玲[4] 兰剑[5] 

机构地区：[1]宁夏农林科学院种质资源研究所,宁夏银川750002 [2]灵武市林业局,宁夏灵武750400 [3]灵武市农业机械化推广服务中心,宁夏灵武750400 [4]宁夏农林科学院园艺研究所,宁夏银川750021 [5]宁夏大学农学院,宁夏银川750021

出　　处：《北方园艺》2012年第8期9-13,共5页Northern Horticulture

基　　金：宁夏自然科学基金资助项目(NZ0983)

摘　　要：利用主成分综合因子得分和灰色关联度分析理论对宁夏天然草地气象质量进行了综合评价,并对天然草地初级生产力与各气候因素间的相互关系进行了关联分析,研究各气象因子对天然草地初级生产力的制约效应。结果表明:宁夏干旱地区13个市县天然草地的气象质量可以划分为3个等级,半干旱区6个市县的天然草地的气象质量可以划分为2个等级。限制宁夏干旱区天然草地初级生产力最主要的气象因子是4～9月降水量,其次是年降水量、湿润度和年蒸发量;宁夏半干旱区天然草地初级生产力最主要的限制气象因子是湿润度,其次是4～9月降水量、年降水量和无霜期。A comprehensive evaluation of the climate quality in Ningxia grassland,and a mutual relations between the primary productivity of natural grassland and the various climatic factors were analyzed by using integrated principal component factor scores and gray correlation analysis of the theory.The results showed that meteorological quality of the arid natural grassland in 13cities and counties of Ningxia could divided into three grades;meteorological quality of the semi-arid natural grassland of 6cities and counties of Ningxia could be divided into two grades.The most important meteorological factor constraining Ningxia primary productivity of natural grassland in arid areas was precipitation from April to September,followed by annual precipitation,humidity degree,and annual evaporation.In contrast,the most important meteorological factor in semi-arid regions was the humidity degree,followed by precipitation from April to September,annual precipitation and frost-free period.

关 键 词：气象因素 初级生产力 天然草地 灰色关联度 

分 类 号：P462.3[天文地球—大气科学及气象学]