草地类型梯度分析  

Gradient Analysis of Rangeland Types

作　　者：李卫军[1] 许鹏[1] 

机构地区：[1]新疆八一农学院草原系

出　　处：《草业学报》1994年第2期6-11,共6页Acta Prataculturae Sinica

摘　　要：紫泥泉地区位于天山北坡低山带，具有代表性的冬春秋放牧场。本文应用数量分类（ＴＷＩＮＳＰＡＮ）、排序（ＤＣＡ）和回归分析方法研究了草地类型的分类及其分布的梯度规律。研究结果表明：该地区的草地类型按传统分类划分出１８个型，ＴＷＩＮＳＰＡＮ分类结合ＤＣＡ排序归纳出８个型，其中６个型为地带性草地类型，２个型为非地带性草池类型；地带性草地类型沿水热梯度分布，非地带性草地类型沿质地梯度分布。The Ziniquan Area is located in low -leveled mountainous belt of northern slope of Tianshan Moun-tain Fange.Xinjiang Uigur Autonomous Region. There are representative rangelands of all types in seasonaldisparity. such as. winter. spring, fall... pasturing cites. The paper of ours has inade report on claseification ofcangeland (or grass-land on a smiailscaie)types .their law of distribution gradient by using numerical tax-onomy (TWINSPAN). ordination(DCA) and regression analysis. The results of research work showed thatthere are 18 nangeland lypes in the survey area as according to the traditional classification. However,only8 rangeland types were classified in accordance with TWINSPAN and DCA. and another 6 out of the 8 justforementioned were regarded as 'zonal' rangeland types;of course, the rernained 2 were 'azonal' accord-ingly.The zonal rangeland tylies were distributed along the water and heat gradient aboriginally inXinjiang , whereas the azonal ones were distributed along the texture gradient all in due succession on the ba-sis of our analysis in use for the study.

关 键 词：草地类型 梯度 

分 类 号：S812.3[农业科学—草业科学]