摘要
利用灰色理论，对青海省青南牧区天然草地产草量与水、热两因子的关联程度进行分析，其目的是从量化的角度，探索该区域草地的主导制约因子。研究主要采用选点、典型抽样、收集资料的方法，以１９８８～１９９７年１０年间的草地产量实测值为对照列，以≥０℃年积温、年降水量、３～９月间的月均温、月降水量为对比列，经计算，其结果是水、热两因子与产草量的关联度基本相等，但在该区域水分条件较好的情况下，热量条件是主导因子，尤其是６、７、８三个月温度的高低是决定当年天然草地产草量的关键因素。
Grey Relationship Theory was used to analyze the relationship between natural herbage yield and heat, water factors in the pasture of southern Qinghai Province in order to find the key factor affecting herbage productivity. The annual herbage yield during 10 year from 1988 to 1997 was used as baseline, and annually accumulated temperature ≥0 ℃, annual precipitation, average monthly temperature and precipitation from Mar. to Sep. as the different control groups, respectively. The results showed that there were the basically same Grey Relationship between heat, water and herbage yield. But the heat was the key factor affecting the herbage yield, especially in June, July and August if the water condition was good.
出处
《草业科学》
CAS
CSCD
北大核心
1999年第4期37-41,共5页
Pratacultural Science
关键词
青南牧区
牧草
草地
产草量
水
热
关联分析
the pasture of southern Qinghai Province
grassland
grass yield
water and heat factor
gey
relationship analysis
