Layout Study Of County Cultivated Land S’ Quality Monitor Samples Based On Geostatistics

Through the use of advanced technologies and methods, the quality of cultivated land change and driving mechanism research, provide scientific basis for farmland protection and management. Preclude the kind of research the best layout program, namely the use of a limited number of samples and the best monitor samples layout mode. Both can reduce sampling costs without losing its accuracy, representativeness, and can reach a certain accuracy requirements for scientific decision-making arable land quality monitoring has a very important practical significance.The thesis take in Gong’an County Hubei Province as an example, using statistical methods, from a large number of elements such as organic matter, available N, available P, available K, trace elements, namely of iron manganese, copper, zinc and boron elements such as soil fertility index, in order to study the spatial structure. On this basis, to explore suitable for county scale of cultivated land quality monitoring point optimal layout. The results show that:when the sampling interval is5000meters, which can guarantee the accuracy of sampling, but also reduce the sampling cost, it can be considered to be the optimal sampling interval.Aiming at the monitoring mission of fixed monitoring point and dynamic monitoring points, according to1:2ratio and the optimal sampling interval,40fixed monitoring points and80dynamic monitoring points8were set up. Considering the different types of cultivated land, the proportion of Gong’an County Road, irrigation and drainage conditions and away from residential areas near and far influence on cultivated land quality point of view, local monitoring point was adjusted, eventually forming sites of Gong’an County cultivated land quality monitoring layout scheme.This study shows that:through analysis of the quality of cultivated land spatial structure and distribution, to explore the optimal sampling interval; from the point of influence of cultivated land type, field road, irrigation and drainage conditions and the distance from residential areas of cultivated land quality factors, monitoring points layout was optimized, it can be reduce the sampling the ideal effect of costs based on ensuring the monitoring accuracy.