CAJ | 학술논문

以龙海市为研究区，在沿海平原区与丘陵山地区分别采用4种格网密度（0．5 km ×0．5 km、1 km ×1 km、2 km ×2 km与3 km ×3 km）与4种不同样点分类方式的组合，研究不同地貌区高效表征土壤有机质空间变异的采样点布设方式。结果表明，在不同格网密度下，沿海平原区按土壤类型进行采样的土壤有机质均方根误差均较其他方式低，为精度最高的样点布设方式；丘陵山地区以土地利用方式结合土壤类型为高效的样点布设方式。在样点密度布设方面，沿海平原区0．5 km ×0．5 km、1 km ×1 km与2 km ×2 km三种格网密度的土壤有机质均方根误差差值均在35％以内，而2 km ×2 km格网密度下的样点数量仅为0．5 km ×0．5 km的15．21％，因此，在精度要求不高的情况下，为节约成本，可采用2 km ×2 km格网密度下进行采样。同理，丘陵山地区宜采用2 km ×2 km格网密度，按土地利用类型结合土壤类型的分类方式进行样点布设。
이룡해시위연구구，재연해평원구여구릉산지구분별채용4충격망밀도（0．5 km ×0．5 km、1 km ×1 km、2 km ×2 km여3 km ×3 km）여4충불동양점분류방식적조합，연구불동지모구고효표정토양유궤질공간변이적채양점포설방식。결과표명，재불동격망밀도하，연해평원구안토양류형진행채양적토양유궤질균방근오차균교기타방식저，위정도최고적양점포설방식；구릉산지구이토지이용방식결합토양류형위고효적양점포설방식。재양점밀도포설방면，연해평원구0．5 km ×0．5 km、1 km ×1 km여2 km ×2 km삼충격망밀도적토양유궤질균방근오차차치균재35％이내，이2 km ×2 km격망밀도하적양점수량부위0．5 km ×0．5 km적15．21％，인차，재정도요구불고적정황하，위절약성본，가채용2 km ×2 km격망밀도하진행채양。동리，구릉산지구의채용2 km ×2 km격망밀도，안토지이용류형결합토양류형적분류방식진행양점포설。
In order to study sampling points allocation methods for spatial variability of soil organic matters in different terrains , Longhai City was chosen an object as a research area .and the combination of four grid densities (0.5 km ×0.5 km, 1 km ×1 km, 2 km ×2 km and 3 km ×3 km) and four classification methods in coastal plain and hilly regions was adopted .At the same time the spatial interpolation methods to predict and compare the accuracy of soil organic matter contents were applied .The results showed as follows.In coastal plain , under different grid densities , sampling point layout according to soil types , the root mean square error of soil organic matters was lower compared with other methods .In this sampling points allocation method its accuracy was the highest . Meanwhile in hilly and mountainous region , sampling point layout based on the land use patterns and soil types was a more efficient way.On the sampling point density layout , in coastal plain , the value differences of root mean square error all were within 35%in 0.5 km ×0.5 km、1 km ×1 km and 2 km ×2 km grid densities.While in 2 km ×2 km grid density, the amount of the sampling points was only 15.21%of that in 0.5 km ×0.5 km grid density.That is to say if there is no need of a high accuracy , using 2 km ×2 km grid density to allocate the sampling points is a better choice to save the cost .It showed the same result to allocate the sampling points in 2 km ×2 km grid density based on the land use patterns and soil types in the hilly and mountainous region .