干旱地区农业研究2017，Vol.35Issue(5)：136-141,6.DOI:10.7606/j.issn.1000-7601.2017.05.20
基于限制类型与空间异质性的耕地质量监测样点布设
Layout sampling for cultivated land monitoring based on restricted types and spatial heterogeneity
摘要
Abstract
The quantity and quality of cultivated land plays an important role in ensuring food security and maintaining social stability,monitoring the existing cultivated land quality change has a strategic significance for cultivated land resource security.The samples establishment method of cultivated land monitoring in a county scale was explored with a example of Wushan County.Choosing four main factors affecting the quality of cultivated land and limit coefficients were calculated,cultivated land was divided into 6 limit types according to the high-low scale of limit coefficients;semi-variogram function was used to analyze the variability of national natural grade index and 44 monitoring samples were found based on farmland limit types division.Kriging method validation showed that the samples laid accurate and reliable to meet the monitoring requirements.This method greatly improved the representativeness and accuracy of the samples,and provides a reference for farmland quality monitoring management and implementation.关键词
土地利用/监测布点/半变异函数/耕地限制类型/优化布局Key words
land use/monitoring sites/semivariogram function/cultivated land type/optimal layout分类
管理科学引用本文复制引用
马燕,陈英,路正..基于限制类型与空间异质性的耕地质量监测样点布设[J].干旱地区农业研究,2017,35(5):136-141,6.基金项目
国家自然科学基金(7163003) （7163003）
甘肃农业大学青年导师基金(GAU-QNDS-201201) （GAU-QNDS-201201）
