ZOU Cheng,XU Fu-li,YAN Ya-dan.Analysis of Soil Nitrogen Leaching Under Different Land Uses Patterns in the Loess Hilly and Gully Region[J].Research of Soil and Water Conservation,2009,16(03):114-116.
黄土高原丘陵沟壑区不同土地利用模式对土壤氮素淋溶的影响
- Title:
- Analysis of Soil Nitrogen Leaching Under Different Land Uses Patterns in the Loess Hilly and Gully Region
- 分类号:
- F301.24;S157
- 摘要:
- 通过对黄土高原丘陵沟壑区不同土地利用模式土壤剖面NO3--N、NH4+-N、有机质和全氮分布的测定，论述黄土高原丘陵沟壑区不同土地利用模式对土壤氮素淋溶的影响，对当地农业发展提出建议。结果表明：在200 cm内土壤NO3--N最大值都出现在200 cm处，其中日光温室最大为20.36 mg/kg。土壤NH4+-N在200 cm内是较均匀的分布在10～25 mg/kg。不同土地利用模式对土壤剖面土壤NH4+-N、有机质和全氮分布没有影响。随着深度的变化对土壤NH4+-N分布也没有影响。土壤有机质和全氮在土壤剖面的分布是，随着深度的增加而减少，60 cm以下有机质保持在1.07～5.95 g/kg，全氮保持在0.12～0.35 g/kg。根据试验结果得出，土壤氮素淋溶的主要成分是NO3--N，土壤NO3--N淋溶程度与降雨、灌溉、施肥量呈正比，在坡地的淋溶较少。
- Abstract:
- According to soil profile of nitrate nitrogen, ammonium nitrogen, organic matter and total nitrogen under different land uses patterns,effects of soil nitrogen leaching under different land uses in the loess hilly and gully region were discussed in detail, and proposals were gaven for local agricultural development. The results showed that soil nitrate nitrogen maximum appeared on 200 cm. The maximum is that solar greenhouse’s content is 20.36 mg/kg. Soil ammonium nitrogen content is 10～25 mg/kg. Effect of soil ammonium nitrogen, organic matter and total nitrogen under different land uses in the loess hilly and gully region were not obvious. With the depth of the changes soil ammonium nitrogen haven’t changes. Soil organic matter and total nitrogen’s distribution decreases with the increase in depth, but kept organic matter content at 1.07～5.95 g/kg and kept total nitrogen at 0.12～0.35 g/kg under 60 cm. The results showed that soil nitrogen leaching’s main components is soil nitrate nitrogen, soil nitrate nitrogen leaching and rainfall, irrigation, fertilization amount was positive correlation, soil nitrate nitrogen leaching is less in slope land.
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备注/Memo
收稿日期:2008-12-16。
基金项目:国家科技支撑计划课题“丘陵沟壑区生态经济建设模式研究与示范”（2006BAD09B07）。
作者简介:邹诚（1984- ），男，陕西西安人，在读硕士，主要从事土壤环境效应方面研究。E-mail：xbdxzc_039@163.com
通讯作者:徐福利（1958- ），男，陕西富平人，研究员，博士，主要从事植物营养方面的研究工作。E-mail：xfl-163@163.com