| 冯晓静,高焕文,李洪文,王晓燕.河北坝上风蚀对农田土壤肥力水平影响研究[J].干旱地区农业研究,2007,(1):63~66 |
| 河北坝上风蚀对农田土壤肥力水平影响研究 |
| Effect of wind erosion on the fertility of farmland at Bashang of Hebei |
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| DOI：10.7606/j.issn.1000-7601.2007.01.13 |
| 中文关键词: 风蚀 土壤有机物 养分 衰减机理 |
| 英文关键词:wind erosion organic materials nutritional elements mechanization of the loss |
| 基金项目:科技部农业科技成果转化基金(02EFN216900734) |
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| 中文摘要: |
| 河北坝上地区风多风大,冬春季节降水少,使得大片农田长期处于强烈的风蚀之中。由于地表土壤养分的大量流失,农田土壤生产能力下降,导致荒漠化进程加剧。针对传统和保护性耕作农田土壤及风蚀物养分的变化,研究分析了土壤的风蚀和有机物及养分衰减的定量关系及其衰减的机理。结果表明:风蚀过程是农田土壤退化的重要路径,可以通过风蚀物中有机质和养分的含量估算农田土壤的有机质和养分的损失量。土壤风蚀过程中,保护性耕作比传统耕作可以减少风蚀量62.56%。有机质损失减少31.05%,全氮损失减少29.15%,全磷损失减少32.25%,全钾损失减少66.11%;有机质及养分主要集中在细微的土壤颗粒之中。风蚀对土壤营养物质及有机质的流失高于土壤的流失,风蚀是土壤退化的重要原因,恶化环境的同时造成了严重的经济损失。可以采用保护性耕作技术防止农田沙漠化和提高作物产量。 |
| 英文摘要: |
| Experiment was conducted in farmland in Bashang of Hebei Province during wind erosion season,in order to study the change of the soil and the wind erosion materials.This paper analyzes the relationship between wind erosion and loss of organic materials and nutritional elements,and the mechanization of the loss.The main result was as following:(1) Conservation tillage is more effective in reducing wind erosion than traditional tillage,at the two spots of the experiment,the reduction is 62.56%.(2) Conservation tillage can reduce the loss of organic materials and nitrogen(N),phosphorus(P),kalium(K) than traditional tillage,reduction of organic materials is 31.05%,reduction of nitrogen(N) is 29.15%,reduction of phosphorus(P) is(32.25%,) reduction of kalium(K) is 66.11%.(3) At the same time,the topsoil moisture content of conservation tillage is increased by 37.7% compared with traditional tillage.The control of wind erosion can maintain the fertility of farmland in arid and semi arid region. |
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