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用生物量(指地上部份)作为灌木林评价立地质量的指标,选出影响评价立地质量生物量的主要立地因子(沙丘流动程度、沙丘部位、沙丘大小等)和非立地因子(年龄、密度、平茬等),将质的数据,通过处理转为“量的数据”作为自变量,生物量作为因变量,建立数量化(I)数学模型,编制出9个灌木种,柠条(Carag-ana intermedia Kuang et H.C.Fu)、毛条(Caragana korshinskii Kom)、花棒(Hedysarum scoparium Fisch et Mey.)、踏郎(Hedysarum laeve B.Fedts-ch.)、沙柳(Salix psammophila C.Wang et Ch.)、紫穗槐(Amorpha frticosaL.)、沙棘(Hippophae rhamnoides L.)、白沙蒿(Artemista sphaerocephala T-rasch)、黑沙蒿(Artemisia ordosica Frasch)数量化表,其相关系数、剩余标准差、各项指标都达到要求。以此表为基础,对同一立地类型上各个灌木种生物量进行综合评价,按生物量的高低进行排序,目的是做到适地适树,能在各个立地类型上栽植最适宜的灌木种。在有林地区冠幅、灌高能集中反映灌木地上部分生物产量,可以建立多元回归数学模型,为估计有林地灌木种生物量提供一个简便的方法。
The biomass (referred to aboveground part) was used as an index to evaluate the standing quality of shrubbery. The main site factors influencing on-site quality biomass (sand dune flow, sand dune area, sand dune size) and non-site factors , Stubble, etc.), the quantitative data, through the processing of “data” as an independent variable, biomass as a dependent variable to establish a mathematical model (I), the preparation of nine shrub species, Carag -ana intermedia Kuang et HCFu, Caragana korshinskii Kom, Hedysarum scoparium Fisch et Mey., Hedysarum laeve B. Fedts-ch., Salix psammophila C. Wang et Ch , Amorpha frticosa L., Hippophae rhamnoides L., Artemisia sphaerocephala T-rasch, Artemisia ordosica Frasch, correlation coefficient, residual standard deviation, The indicators meet the requirements. Based on this table, the comprehensive assessment of the biomass of shrubs on the same site type was conducted, and the order of biomass was ranked in order to be suitable for tree planting and to plant the most suitable shrub species in each site type. In the forested area of the forested area, irrigation and can concentrate on the shrubs to reflect part of the biological yield, can establish multiple regression mathematical model for the estimation of woodland shrub biomass provides a simple method.