| 秸秆还田农田土壤养分的空间变异性研究 |
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| 引用本文： | 张舜凯,刘继龙,刘海岳.秸秆还田农田土壤养分的空间变异性研究[J].国土与自然资源研究,2019(4):78-79. |
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| 作者姓名： | 张舜凯 刘继龙 刘海岳 |
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| 作者单位： | 东北农业大学水利与土木工程学院,哈尔滨,150030;东北农业大学水利与土木工程学院,哈尔滨,150030;东北农业大学水利与土木工程学院,哈尔滨,150030 |
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| 基金项目： | 国家自然科学基金;黑龙江省自然科学基金;东北农业大学学术骨干项目;黑龙江省博士后科研启动基金;东北农业大学大学生SIPT计划项目 |
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| 摘 要： | 利用地统计学和多重分形方法研究分析秸秆还田农田土壤养分的空间变异性。结果表明:土壤碱解氮、速效钾和有效磷的空间相关范围介于14.30m-22.30m;土壤速效钾、碱解氮和有效磷均为强烈空间相关性;土壤碱解氮、有效磷和速效钾均具有多重分形特征;土壤碱解氮的空间变异性主要由其低值引起,土壤有效磷和速效钾主要由其高值引起;土壤有效磷、碱解氮和速效钾的空间变异程度依次减弱。
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| 关 键 词： | 秸秆还田 农田 土壤养分 空间变异性 |
Spatial variability of soil nutrient of field under straw returning |
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| Institution: | (School of Water Conservancy and Civil Engineering,Northeast Agricultural University,Harbin 150030,China) |
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| Abstract: | Spatial variability of soil nutrient was studied with geostatistics and multifractal methods.The results showed that spatial correlation range of soil alkali-hydrolyzable nitrogen,available potassium and available phosphorus was between 14.30m and 22.30m;soil available potassium,alkali-hydrolyzable nitrogen and available phosphorus had strong spatial correlation and multifractal characteristic;spatial variability of soil alkali-hydrolyzable nitrogen was caused by its low value and the one of soil available phosphorus and potassium was caused by their high values;variability degree of soil available phosphorus,alkali-hydrolyzable nitrogen and available potassium decreased gradually. |
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| Keywords: | Straw returning Field Soil nutrient Spatial variability |
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