| GPS定位对贵州喀斯特山区县级尺度土壤养分变异与空间格局研究--以务川县为例 |
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| 引用本文： | 张建.GPS定位对贵州喀斯特山区县级尺度土壤养分变异与空间格局研究--以务川县为例[J].西南农业学报,2006,19(3):414-417. |
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| 作者姓名： | 张建 |
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| 作者单位： | 贵州省农业科学院,贵州,贵阳,550006 |
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| 摘 要： | 在贵州选取有代表性的喀斯特区县,根据耕地土壤类型,利用GPS定位,采集300个土壤样品,开展喀斯特山区县级农田土壤养分变异与空间格局研究。结果表明:喀斯特山区县级尺度下,耕地总体有机质与氮、磷、钾养分含量变幅大(分别为3.81~82.65 g/kg、21.84~325.94 mg/kg、0.64~89.72 mg/kg、30.80~481.28 mg/kg),酸碱反应覆盖范围宽。两种类型耕地土壤养分差异明显,养分的高量水平与低量水平差异达显著水平。5种土壤养分中,有效磷含量分布呈现出较高的均质性,其余4种养分分布格局较为复杂,表现出较强的空间异质性特征。
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| 关 键 词： | 喀斯特 县级尺度 养分 空间格局 |
| 文章编号： | 1001-4829（2006）03-0414-04 |
| 收稿时间： | 2006-02-28 |
| 修稿时间： | 2006-02-28 |
Study on variability and spatial distribution of chemical characters for soils in county scale in Guizhou Karast mountainous areas--Wuchuan county as an example |
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| ZHANG Jian.Study on variability and spatial distribution of chemical characters for soils in county scale in Guizhou Karast mountainous areas--Wuchuan county as an example[J].Southwest China Journal of Agricultural Sciences,2006,19(3):414-417. |
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| Authors: | ZHANG Jian |
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| Institution: | Guizhou Academy of Agricultural Sciences, Guizhou Guiyan 550006 ,China |
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| Abstract: | In representative county of Karast mountainous areas of Guizhou province,300 of soil samples were collected according to soil types and by using GPS,in order to study the variability and spatial distribution of soil nutrients for Karast mountainous areas.The results indicated that the total contents ranges of organic matter,phosphorus and nitrogen were large for farmland soils(3.81-82.65 g/kg,21.84-325.94 mg/kg,0.64-89.72 mg/kg,30.80-481.28 mg/kg,respectively),and also the value of pH as well in county scale of this region.The difference of nutrients for two types of farmland soils was remarkable,and the difference of them between the high value and the low value was also obvious.Among 5 kinds of soil nutrients,the distribution of available phosphorous showed higher homogeneity,the ones of other 4 nutrients showed higher heterogeneity with more complicated patterns. |
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| Keywords: | Karast county scale nutrients spatial distribution |
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