| 黄土丘陵区不同类型农地的养分循环平衡特征 |
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| 引用本文： | 赵护兵,刘国彬,吴瑞俊.黄土丘陵区不同类型农地的养分循环平衡特征[J].农业工程学报,2006,22(1):58-64. |
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| 作者姓名： | 赵护兵 刘国彬 吴瑞俊 |
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| 作者单位： | 1. 西北农林科技大学资源环境学院,杨凌,712100
2. 西北农林科技大学资源环境学院,杨凌,712100;中科院水利部水土保持研究所,杨凌,712100 |
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| 基金项目： | 国家科技攻关项目;国家重点基础研究发展计划(973计划);中国科学院知识创新工程项目 |
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| 摘 要： | 该文以黄土丘陵沟壑区的安塞试验站长期肥料定位试验的实测资料为研究对象，定量研究川地、坡地、梯田不同类型农地养分循环特征。研究结果表明：川地、坡地、梯田与农民习惯施肥水平相类似的处理，年养分盈亏量分别是：川地每年每hm2氮素盈余10.2 kg，P2O5盈余56.6 kg；坡地每年每hm2氮素亏损7.0 kg，P2O5亏损14.7 kg；梯田每年每km2氮素盈余104.9 kg，P2O5盈余107.3 kg。退耕还林和实施“坡改梯”工程是黄土丘陵沟壑区农地养分循环不断朝良性方向发展的关键措施。
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| 关 键 词： | 黄土丘陵区 川地 坡地 梯田 养分循环平衡 |
| 文章编号： | 1002-6819(2006)01-0058-07 |
| 收稿时间： | 2/1/2005 12:00:00 AM |
| 修稿时间： | 2005-07-30 |
Nutrient cycling and balance characteristics of different farmland types in the loess hilly region |
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| Zhao Hubing,Liu Guobin and Wu Ruijun.Nutrient cycling and balance characteristics of different farmland types in the loess hilly region[J].Transactions of the Chinese Society of Agricultural Engineering,2006,22(1):58-64. |
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| Authors: | Zhao Hubing Liu Guobin and Wu Ruijun |
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| Abstract: | Based on data of the long-term fertilizer experiment of plain field, sloping field and terrace on Ansai station in loess hilly region, the nutrient cycling and balance characteristics of different farmland types were quantitatively analyzed. The result showed that N surplus amount of plain field was 10.22 kg/(hm2·a), while P2O5 was 56.57 kg/(hm2·a). N deficit amount of sloping field was 10.2 kg/(hm2·a), while P2O5 was 56.6 kg/(hm2·a). N surplus amount of terrace was 104.9 kg/(hm2·a), while P2O5 was 107.3 kg/(hm2·a). The vegetation rehabilitation and sloping field exchange terrace project were the key measures for improving the farmaland nutrient cycling system in the loess hilly region. |
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| Keywords: | loess hilly region plain field sloping field terrace nutrient cycling and balance |
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