CAJ | 학술논문

利用从2008年河南省新乡县测土配方施肥项目2694个农化样中随机抽取的1347个样点数据，选取有效磷和缓效钾为研究对象，通过K riging、IDW、PRP 3种插值方法对其进行制图，以空间差异度为评价标准，比较不同插值方法的制图效果及影响因素，以期为土壤属性空间预测提供理论依据。结果表明：从制图结果空间差异度统计特征值及其各等级面积百分比来看，制图效果优劣程度为Kriging法＞IDW法＞PRP法；从空间差异度各等级所包含的样点数来看，不同插值方法制图结果受样点分布影响，空间差异度小的区域内包含样点数较多，而空间差异度大的区域内包含样点数较少；另外，制图结果还受土壤属性自身空间变异性的影响，因此，对于空间随机性变异的土壤属性应在变异较大的区域内增大采样密度，确保制图结果空间表达的准确性。
이용종2008년하남성신향현측토배방시비항목2694개농화양중수궤추취적1347개양점수거，선취유효린화완효갑위연구대상，통과K riging、IDW、PRP 3충삽치방법대기진행제도，이공간차이도위평개표준，비교불동삽치방법적제도효과급영향인소，이기위토양속성공간예측제공이론의거。결과표명：종제도결과공간차이도통계특정치급기각등급면적백분비래간，제도효과우렬정도위Kriging법＞IDW법＞PRP법；종공간차이도각등급소포함적양점수래간，불동삽치방법제도결과수양점분포영향，공간차이도소적구역내포함양점수교다，이공간차이도대적구역내포함양점수교소；령외，제도결과환수토양속성자신공간변이성적영향，인차，대우공간수궤성변이적토양속성응재변이교대적구역내증대채양밀도，학보제도결과공간표체적준학성。
Kriging ,inverse distance weight method(IDW) and polygon value represented by point value method(PRP) were used for mapping of available phosphorus and slow-release potassium , and the influence factors and effects of these interpolation methods for soil properties mapping based on spatial difference degree were analyzed with 1 347 sample data from 2 694 soil samples collected from Xinxiang county of Henan province in 2008 .The results showed that the effect of mapping was the best using Kriging method ,IDW method was worse ,and PRP method was the worst ;the effects of mapping with these interpolation methods were influenced by the space dis-tribution of samples ,more samples were included in the region with lower spatial difference de-gree ,and the other region included fewer samples ;due to the impact of soil properties themselves spatial variability on mapping ,for the soil properties with spatially random variation sampling density should be increased in severe variation region to ensure the mapping results accuracy .