荒漠草地四种灌木单株生物量估测方法

Methods to Estimate Individual Biomass of four Shrubs Desert Grassland

研究了砾石荒漠草地上松叶猪毛菜（Ｓａｌｓｏｌａｌａｒｉｃｉｆｏｌｉａ）、合头草（Ｓｙｍｐｅｇｍａｒｅｇｅｌｉｉ）、中亚木紫菀（Ａｓｔｅｒｏｔａｍｕｎｓｃｅｎｔｒａｌｉ－ａｓｉａｔｉｃｕｓ）和琵琶柴（Ｒｅａｕｍｕｒｉａｓｏｏｎｇｏｒｉｃａ）的形体特征与产量的关系，建立了估算四种灌木生物量的回归公式：松叶猪毛菜：Ｙ＝－５３．２６２６＋２．３５５Ｘ＿１＋０．９０６２Ｘ＿２＋０．５６０６Ｘ＿３合头草：Ｙ＝－１７．８２２８＋０．９２２６Ｘ＿１＋０．３９６５Ｘ＿２＋１．０５３１Ｘ＿３中亚木紫菀：Ｙ＝－１７．２３５６＋０．７３３９Ｘ＿１＋０．４０６８Ｘ＿２＋０．７０３４Ｘ＿３琵琶柴：Ｙ＝－２１．３６０５＋１．１０９３Ｘ＿１＋０．２１８２Ｘ＿２＋０．３８９３Ｘ＿３其中：为灌木单株生物量（ｇ），Ｘ＿１为灌木的最大直径（ｃｍ），Ｘ＿２为灌木的垂直直径（ｃｍ）Ｘ＿３为灌木的丛高（ｃｍ）。复相关系数分别为０．９６０９，０．９４８１，０．９１５０，０．９６６１。

The relationships between blomass and plant size characteristics were studiedon four shrubs,which were Salsola laricifolia,sympegma regelii,Asterothamnus centrali-asi-aticum and Reaumuria soongorica. Reqression equations were worked out as following:Salsola laricifolia:Y=-53.2626+2.355X_1+0.9062X_2+0.5606X_3 Sympegma regelii:Y=-17.8228=0.9269X_1+0.3965X_2+1. 0531X_3 Asterotamnus centrali-asiaticus:Y=-17.2356+0.7339X_1+0.4068X_2+0.7034X_3 Reaumuria soongorica: Y=-21.3605+1.1093X_1+0.2182X_2+0.3893X_3 The Y,X_1,X_2,and X_3 in equation were in dividual biomass,diametre,vertical diameterand bushes height ,respectively.The multiple correlation coefficients of were 0.9609,0.9481,0.9150,0.9661 respective-ly.