| 灌溉条件下长期定位施肥对壤土剖面养分分布特征的影响 |
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| 作者姓名： | 古巧珍 杨学云 孙本华 马路军 同延安 赵秉强 张夫道 |
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| 作者单位： | 西北农林科技大学资源环境学院 陕西杨凌712100
(古巧珍,杨学云,孙本华,马路军,同延安),中国农业科学院土壤肥料研究所 北京100081
(赵秉强),中国农业科学院土壤肥料研究所 北京100081(张夫道) |
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| 基金项目： | 国家科学技术部"国家野外台站试验站土壤肥力与肥料效益监测基地网"项([2000]科基便字第076号). |
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| 摘 要： | 对塿土12年连续施肥后土壤剖面养分分布的研究发现,施肥使有机质、全P在耕层(0~20cm)与CK比较有不同程度的增加;施肥可以显著影响0~200cm土壤剖面有机质的含量;PK处理土壤剖面存在P素适度下移,120~220cm全磷含量呈现峰值;施肥对塿土耕层及0~300cm剖面全K含量几乎无影响;塿土粘化层可以减缓养分的下移;氮磷钾化肥与有机肥配合施用,使土壤NO3--N与CK比较有适度增加,对培育土壤肥力有利。
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| 关 键 词： | 塿土 剖面养分含量分布 长期施肥 |
Effects of Long-term Fertilization and Irrigation on Soil Nutrient Distribution in Profiles of Loess Soil |
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| Authors: | Gu Qiaozhen Yang Xueyun Sun Benhu Ma Lujun Tong Yanan Zhao Bingqiang Zhang Fudao |
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| Institution: | (1College of Resources and Environment, Northwestern Sci-Tech Univ. of Agric. Forestry, YangLing, Shaanxi 712100; 2 Inst. Of Soil and Fertilizer, CAAS, Beijing 100081) |
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| Abstract: | Nutrient distributions of the profiles of loess soil were studied after fertilizer were applied for 12 years continuously. The results showed that organic matter and total P of fertilization treatments were increased in the 0~20cm soil layer were higher than that of CK, organic matter content was different in 0~200cm profile of loess soil. The treatments of P,K phosphorus leaching loss in the soil profile and total-P content was higher in the 120~220cm soil profile. Total K content in 0~300cm soil profile almost invariableness with application Potassium .Laying horizon of loess soil was the efficient way to control nutrient leaching loss. Application N,P,K combined with organic manure was the best way to increase NO3--N than that of CK, and it could improve fertility of loess soil. |
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| Keywords: | Loess soil Nutrient distribution in profile Long-term fertilization |
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