CAJ | 학술논문

天然草地合理载畜量是反映草地合理利用强度的基本单位。为提高草地合理载畜量的划分精度,根据“极大似然逼近原理”,创建了异质因子控制下的“线性回归+区域化值残差修正”数据空间化方法。以全国草地资源调查汇总数据中县域理论载畜量和1∶400万中国草地资源图为基础数据,采用分省控制构建了理论载畜量与植被类型-生产力异质植被斑块的线性回归模型,其判定系数由全国模型下的0.867提高到0.937,拟合优势度较高,所获得的中国公里格网草地合理载畜量分布图空间化精度也较高。中国公里格网草地合理载畜量分布图不仅表明了不同类草地因生产力的不同有不同的放牧要求,也体现了不同环境条件下草地载畜能力的差别,有效反映了单位面积内草地植被载畜-生产力水平,为生态治理和草地资源保育工作中合理制定草地利用强度提供了理论参考。
천연초지합리재축량시반영초지합리이용강도적기본단위。위제고초지합리재축량적화분정도,근거“겁대사연핍근원리”,창건료이질인자공제하적“선성회귀+구역화치잔차수정”수거공간화방법。이전국초지자원조사회총수거중현역이론재축량화1∶400만중국초지자원도위기출수거,채용분성공제구건료이론재축량여식피류형-생산력이질식피반괴적선성회귀모형,기판정계수유전국모형하적0.867제고도0.937,의합우세도교고,소획득적중국공리격망초지합리재축량분포도공간화정도야교고。중국공리격망초지합리재축량분포도불부표명료불동류초지인생산력적불동유불동적방목요구,야체현료불동배경조건하초지재축능력적차별,유효반영료단위면적내초지식피재축-생산력수평,위생태치리화초지자원보육공작중합리제정초지이용강도제공료이론삼고。
Reasonable carrying capacity of grassland is a fundamental measure for maintaining proper utiliza-tion of grassland resources.In order to improve the accuracy in estimating the reasonable carrying capacity,the‘Maximum Likelihood Estimate’modeling method was used to develop a ‘multi-variable linear return analysis& residual correction’approach based on the heterogeneous variables.The calculated carrying capacity for coun-ties obtained from the Chinese Grassland Resources Survey and the 1∶4000000 Grassland Resource Map were used as the data source for modeling analyses.A linear regression model was developed to simulate the carrying capacity for different provinces by using vegetation type and heterogeneous plant production as independent var-iables.This method not only significantly improved the coefficient of determination from 0.867 of the national model to 0.937 of current model,but also improved the accuracy of the national reasonable carrying capacity map.The outcomes from this study provided indication on the stocking rate and productivity of per land area for different grassland types,which can be used to facilitate the decision making in grassland management.