| 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 |
| 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 |
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| DOI：10.7606/j.issn.1000-7601.2017.05.20 |
| 中文关键词: 土地利用 监测布点 半变异函数 耕地限制类型 优化布局 |
| 英文关键词:land use monitoring sites semivariogram function cultivated land type optimal layout |
| 基金项目:国家自然科学基金（7163003）；甘肃农业大学青年导师基金（GAU-QNDS-201201） |
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| 中文摘要: |
| 以武山县为例，探讨县域尺度的耕地质量监测样点布设方法，选择影响耕地质量的4个主要因素，计算其限制系数，并按照限制系数的高低划分6个耕地限制类型；采用半变异函数分析国家自然等指数的变异特征并结合耕地限制类型分区得到监测样点44个；通过克里格法验证表明所布设样点准确、可靠，满足监测需求。该研究方法很大程度上提高了监测样点的代表性和准确性，为耕地质量监测的管理和实施工作提供了参考。 |
| 英文摘要: |
| 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. |
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