CAJ | 학술논문

监测样点布设是实现对区域耕地质量监测的基础。为了提高耕地质量监测精度，建立了一套基于监测控制区空间变异性的耕地质量监测样点布控方法。利用Neyman法确定在给定置信度和抽样误差下的研究区最优样点总数；根据耕地质量及其影响因素划定监测控制区，为研究区进行空间分层；利用变异系数为各控制区分配监测样点；在各控制区内采用空间随机法布设监测样点。为了对比该抽样法的估算精度，又采用空间随机抽样法和基于自然质量等别、基于控制区权重的分层抽样法等进行了其余4种抽样布设方案，并计算了5种样点布设方案的Krig－ing估计误差，通过对比发现，在相同的取样总数下，不同的样点布设方案估算精度差别显著，基于控制区空间变异性的耕地质量监测样区分层布控方法的RMSE最小。得出科学的监测样点布设方案，可以在最小的投入下获取最大的信息量，提高耕地质量监测效率和精度。
감측양점포설시실현대구역경지질량감측적기출。위료제고경지질량감측정도，건립료일투기우감측공제구공간변이성적경지질량감측양점포공방법。이용Neyman법학정재급정치신도화추양오차하적연구구최우양점총수；근거경지질량급기영향인소화정감측공제구，위연구구진행공간분층；이용변이계수위각공제구분배감측양점；재각공제구내채용공간수궤법포설감측양점。위료대비해추양법적고산정도，우채용공간수궤추양법화기우자연질량등별、기우공제구권중적분층추양법등진행료기여4충추양포설방안，병계산료5충양점포설방안적Krig－ing고계오차，통과대비발현，재상동적취양총수하，불동적양점포설방안고산정도차별현저，기우공제구공간변이성적경지질량감측양구분층포공방법적RMSE최소。득출과학적감측양점포설방안，가이재최소적투입하획취최대적신식량，제고경지질량감측효솔화정도。
The basis for monitoring the cultivated land quality is the sampling method .In order to improve monitoring accuracy of the cultivated land quality , the study built a spatial sampling method of cultivated land qual-ity based on the monitoring control region spatial variability .This method calculated the optimal sampling number of the whole study area by Neyman method under a certain confidence and sampling error firstly .Then the whole study area was divided into several monitoring control regions based on the cultivated land quality and factors which af -fected the cultivated land quality .These monitoring control regions were used to stratified sampling .Samples dis-tributing for every monitoring control regions based on their spatial variance coefficient were the next step .The spa-tial random sampling method was used to array these distributed samples in every monitoring control regions .4 other kinds of sampling methods were used in this paper to contrast the estimation accuracy of this method include the spatial random sampling method , the stratified sampling method based on the physical quality grades of cultivated land and the stratified sampling method based on weights of monitoring control regions , etc.By contrasting the Kriging estimation error of these 5 kinds of methods , the estimation accuracy of different methods were different sig-nally with the same number of samples , and the estimation error ( measured by RMSE ) of the spatial sampling meth-od of cultivated land quality based on the monitoring control region spatial variability was smallest .In conclusion , a scientific sampling method can obtain the largest information and increase the efficiency and accuracy of the culti -vated land quality monitoring .