| 免耕玉米田土壤速效养分变化研究 |
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| 引用本文： | 杨云马,贾树龙,孟春香,孙彦铭. 免耕玉米田土壤速效养分变化研究[J]. 华北农学报, 2008, 23(Z1) |
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| 作者姓名： | 杨云马 贾树龙 孟春香 孙彦铭 |
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| 作者单位： | 河北省农林科学院,农业资源环境研究所,河北,石家庄,050051 |
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| 基金项目： | 河北省自然科学基金资助项目 |
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| 摘 要： | 采用微区模拟方法,研究了免耕条件下,玉米田土壤硝态氮、速效磷和速效钾含量的动态变化。结果表明:与常规耕作相比,玉米田免耕降低了土壤硝态氮、速效磷和速效钾三种养分含量。其中对土壤硝态氮含量影响最大,降低达显著水平;速效磷含量次之;对速效钾含量影响最小。0~20 cm土壤硝态氮含量免耕处理比翻耕处理低15.3%~51.2%。20~40 cm土壤硝态氮含量,免耕处理比翻耕处理低40.9%~46.7%。
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| 关 键 词： | 免耕 玉米 土壤养分 动态变化 |
Soil Available Nutrition Research Under No-tillage Maize Cropping |
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| YANG Yun-ma,JIA Shu-long,MENG Chun-xiang,SUN Yan-ming. Soil Available Nutrition Research Under No-tillage Maize Cropping[J]. Acta Agriculturae Boreali-Sinica, 2008, 23(Z1) |
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| Authors: | YANG Yun-ma JIA Shu-long MENG Chun-xiang SUN Yan-ming |
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| Abstract: | The content of nitrate-N,available-P2O5 and available-K2O in the soil under no-tillage maize cropping through microplot trial was studied.The result showed that the content of soil nitrate-N,available-P2O5 and availableK2O decreased under no-tillage condition compared with conventionanl tillage.Among these,the content of soil nitrate-N was most significantly affeted.The content of available-P2O5 was affected secondly.The least affeted nutrition was available-K2O.The content of soil nitrate-N under no-tillage was 15.3%-51.2% lower than that of the conventional tillage in 0-20 cm,and 40.9%-46.7% lower in 20-40 cm. |
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| Keywords: | No-tillage Maize Soil nutrition |
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