CAJ | 학술논문

秸秆覆盖保墒技术是实现节水灌溉的一项重要举措。为此，基于秸秆覆盖条件下黑土区小尺度农田土壤全氮数据，利用传统统计学和地统计学方法研究秸秆覆盖条件下小尺度农田土壤全氮的空间变异性。结果表明：研究区土壤全氮的半方差函数拟合模型为Linear to sill 模型，土壤全氮具有强烈空间相关性，空间相关性范围为15．90 m。虽然研究区面积较小，但研究区土壤全氮的空间分布中仍存在个别高值区和个别低值区，仍有必要进行土壤全氮的分区管理；在90％和95％置信水平下，实际取样数目都介于精度系数为2％和3％时的合理取样数目之间。
갈간복개보상기술시실현절수관개적일항중요거조。위차，기우갈간복개조건하흑토구소척도농전토양전담수거，이용전통통계학화지통계학방법연구갈간복개조건하소척도농전토양전담적공간변이성。결과표명：연구구토양전담적반방차함수의합모형위Linear to sill 모형，토양전담구유강렬공간상관성，공간상관성범위위15．90 m。수연연구구면적교소，단연구구토양전담적공간분포중잉존재개별고치구화개별저치구，잉유필요진행토양전담적분구관리；재90％화95％치신수평하，실제취양수목도개우정도계수위2％화3％시적합리취양수목지간。
Soil moisture conservation technology under straw mulch was an important way to realize water -saving irriga-tion, based on soil total nitrogen obtained under straw mulch at small scale in black soil region , its spatial variability un-der straw mulch condition was studied with traditional statistics and geostatistics methods .The results showed that the fit-ted model for semivariance function of soil total nitrogen was linear to sill model;soil total nitrogen had strong spatial cor-relation, and range of spatial correlation was 15.90m in the studied area; although the scale of studied area was small , spatial distribution of soil total nitrogen still contained individual high and low value area , which indicated that it was necessary to divide management zones of soil total nitrogen; the actual sampling number was between rational sample numbers for 2%and 3%precision coefficient under 90% and 95% confidence level .