ZHANG Jiu-ming,Su Qing-rui,CHI Feng-qin,et al.Difference Analysis on Nutrient Content of Soil in Nenjiang County[J].HEILONGJIANG AGRICULTURAL SCIENCES,2010,(03):38-40.
嫩江县土壤速效养分差异性分析
- Title:
- Difference Analysis on Nutrient Content of Soil in Nenjiang County
- 文章编号:
- 1002-2767（2010）03-0038-03
- Keywords:
- spatial heterogeneity; black soil; soil nutrients; geostatistics
- 分类号:
- S151.9
- 文献标志码:
- A
- 摘要:
- 利用地统计学和GIS相结合的方法分析了嫩江县土壤速效养分空间异质性。采集土壤表层 0~20 cm土样6 900个，采集土地利用类型为耕地，面积约35.6万hm2，进行化验分析和空间分析。结果表明：速效氮、速效磷、速效钾变异系数均在0.1～1.0，为中等变异；土壤速效磷的理论模型均为指数模型；速效氮和速效钾理论模型为球状模型；速效磷、速效钾的C0/(C0+C）分别为49.9%、50.2%，在25%～75%，表明变量具有中等空间相关性，而速效氮的C0/(C0+C）为79.5%、变量空间相关性较弱，表明土壤养分速效氮受随机性因子影响较大。
- Abstract:
- Geostatistics method and Geographic information systems (GIS) were introduced to study soil nutrient spatial heterogeneity in Nenjiang county of Heilongjiang province. 6 900 soil samples at the depth 0~20 cm were collected over 356 000 hm2 farmland and measured with routine chemical methods and spatial analysis. The results showed that the soil available N, available P and available K were medium variation, and the coefficients of variation (CV) were all between 0.1 and 0.9; the theoretic model of available P is exponent; The theoretic models of available N and available K are spheroid; The ratios between C0 and C0+C of available P and available K were 49.9% and 50.2%, between 25% and 75%, respectively, which indicates the medium spatial correlation of these two nutrients; The ratios between C0 and C0+C of available N was 79.5%, it indicates weak spatial correlation, and available N was strongly affected by random factors.
参考文献/References:
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备注/Memo
基金项目：“十一五”国家科技支撑计划资助项目（2006BAD05B05；2007BAD89B05）