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以新疆博斯腾湖周围分布的唐古特白刺纯林、唐古特白刺+红柳混交林、唐古特白刺+胡杨混交林等3种林型为对象,测定不同林型的唐古特白刺生物量,唐古特白刺灌丛沙包的长度、宽度、高度等指标,应用线性回归方法,分别对不同生境的唐古特白刺灌丛的地上生物量、沙包内生物量、粘土内生物量和总生物量建立了回归预测模型。结果表明,和硕县唐古特白刺灌丛沙包生物量总特征主要表现为:地上生物量、沙包内生物量、地下生物量和防风固沙功能由高到低排序是唐古特白刺纯林>唐古特白刺+红柳混交林>唐古特白刺+胡杨混交林,粘土内生物量则相反。本研究所建立的回归预测模型,在唐古特白刺纯林,除了粘土内生物量以外,各回归方程的p值均小于0.05的显著性水平;在唐古特白刺+红柳混交林,除了灌丛沙包的长度、宽度、高度等指标对沙包内生物量和粘土内生物量的作用分别是显著和不显著以外,其他3个回归方程的p值均小于0.05的显著性水平;在唐古特白刺+胡杨混交林,各回归方程的p值均大于0.05的显著性水平;从整体上看,本项研究所建立的回归模型是可用的。
The species of Nitraria tangutorum, Pinus tangutorum, Castanopsis fargesii, mixed forest of Tangut and Nitraria tangutorum are distributed around the Bosten Lake in Xinjiang. The length, width and height of the white sand shrubs in Tangut were determined by linear regression method. The aboveground biomass, sand biomass, clay biomass and total biomass Established a regression prediction model. The results showed that the total biomass of the sand litter of the tangutorun tanguthuensis in Heshuo County was mainly as follows: aboveground biomass, internal biomass of sandbags, underground biomass, Tanggut Bai prickly ash + willow mixed forest> Tangut Bai prickly and mixed Populus euphratica, the biomass in the clay is the opposite. The regression model established in this study showed that the p values of the regression equations were all less than 0.05 significant except for the biomass in the clay in the pure forest of Nitraria tangutorum, The p values of the other three regression equations were all less than 0.05, except for the effects of length, width and height of sandbags on the biomass in the sandbags and the biomass in clay were significant and not significant. Thorn + Populus euphratica mixed forest, the p-value of each regression equation is greater than 0.05 significance level; on the whole, the regression model established in this study is available.