| 不同取样尺度农田土壤速效养分空间变异特征初步研究 |
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| 引用本文： | 盛建东,肖华,武红旗,陈冰,王军,杨新建.不同取样尺度农田土壤速效养分空间变异特征初步研究[J].干旱地区农业研究,2005,23(2):63-67. |
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| 作者姓名： | 盛建东 肖华 武红旗 陈冰 王军 杨新建 |
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| 作者单位： | 新疆农业大学资源环境学院,新疆,乌鲁木齐,830052;中国农业大学资源与环境学院,北京,100094;石河子大学农学院,新疆,石河子,832003;新疆农业大学资源环境学院,新疆,乌鲁木齐,830052;新疆石河子市121团,新疆,石河子,832066 |
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| 基金项目： | 国家自然科学基金资助项目(40161006),新疆自治区重点学科基金资助. |
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| 摘 要： | 以3种取样间距(100m、50m、25m)进行网格取样,对土壤速效养分的空间变异性进行研究。结果表明:取样间距对土壤速效养分的含量水平、变异系数影响不显著;取样间距对合理取样数目具有一定的影响,合理取样数目分别为:碱解氮(71)、速效磷(36)、速效钾(18)。土壤速效养分的空间变异性主要受结构因素影响,但碱解氮与速效磷受随机因素影响强于速效钾。利用Kriging内插法绘制了不同取样间距土壤速效养分的等值线图。
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| 关 键 词： | 取样间距 速效养分 空间变异 |
| 文章编号： | 1000-7601(2005)02-0063-05 |
| 修稿时间： | 2004年10月11 |
Primary study of spatial variability of available soil nutrients in farmland with different sampling intervals |
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| SHENG Jian-dong,XIAO Hua,WU Hong-qi,CHEN Bing,WANG Jun,YANG Xin-jian.Primary study of spatial variability of available soil nutrients in farmland with different sampling intervals[J].Agricultural Research in the Arid Areas,2005,23(2):63-67. |
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| Authors: | SHENG Jian-dong XIAO Hua WU Hong-qi CHEN Bing WANG Jun YANG Xin-jian |
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| Institution: | SHENG Jian-dong~ |
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| Abstract: | The grid-sampling method was used to study spatial variability of available soil nutrients. The results showed that the sampling intervals did not significantly affect the contents and variance coefficients of available soil nutrients; they affected the proper sample number to some extent and the proper number should be 71 for alkali-hydrolysable nitrogen, 36 for available phosphorous, and 18 for available potassium. The spatial variability of available soil nutrients were mainly affected by structural factors but chance factors affected alkali-hydrolysable nitrogen and available phosphorous more than available potassium. The contour map of the available soil nutrients at different sampling intervals were depicted with Kriging interpolation method. |
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| Keywords: | sampling interval available nutrient spatial variability |
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