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耕地质量动态监测是为掌握实时实地的耕地质量状况,持续定期地通过科学而合理的空间取样,调查影响耕地质量的主要指标或属性,并结合其他数据的分析,对耕地质量的变化做出评估。结合区域耕地质量变化的自然规律,科学构建覆盖面广、层次清楚、代表性强的耕地质量野外监测网络对监测的科学性、监测结果的可靠性具有重要意义。该文研究提出了岩溶地区县域耕地质量野外监测网络布设方法,并以耕地质量等级监测示范县陆良县对此方法进行了实例验证。陆良县共划分为9类监测控制区,共12片;共布设了9个随机监测样点,26个固定监测样点。经论证,所布设监测样点实现了对全县耕地利用类型的全覆盖,具有很好的代表性。研究结果显示,提出的方法符合耕地质量等级监测的需求,可为岩溶区县域耕地质量野外监测网络布设提供技术参考。
The dynamic monitoring of arable land quality is to grasp the real-time on-the-spot quality of arable land, regularly and reasonably through scientific and spatial sampling to investigate the main indicators or attributes that affect the quality of arable land and evaluate the change of arable land quality in combination with other data analysis . Combining with the natural laws of the quality of arable land in the region, it is of great significance to scientifically construct the field monitoring network of arable land with wide coverage, clear hierarchy and strong representativeness, which is of great importance to the scientificity of monitoring and the reliability of monitoring results. This paper puts forward the method of laying field network of cultivated land quality in karst areas and verifies this method with demonstration of cultivated land quality level in Luliang County. Luliang County is divided into 9 types of monitoring and control areas, a total of 12; a total of 9 randomly distributed monitoring samples, 26 fixed monitoring samples. Proved by the monitoring sample set to achieve the county’s full coverage of the type of arable land, has a good representation. The results show that the proposed method is in line with the needs of the monitoring of cultivated land quality level, which can provide technical reference for the field network of farmland quality monitoring in karst areas.