Wang Baiqun,Wang Zhanli.Analysis 0n Soil Fertility and Productivity of Hillside Fields in the First Sub-region of Loess Hilly Region[J].Research of Soil and Water Conservation,1998,5(04):47-51.
黄土丘陵沟壑区第一副区山坡农地土壤肥力与生产力状况分析
- Title:
- Analysis 0n Soil Fertility and Productivity of Hillside Fields in the First Sub-region of Loess Hilly Region
- 摘要:
- 根据调查研究,分析了黄土丘陵第一副区山坡地土壤肥力与生产力状况及其影响因素,表明由于长期土壤侵蚀的影响,该区山坡地土壤的有机质、全氮和碱解氮含量低,虽然全磷和全钾含量相对较丰富,但其有效性不高,土壤水分条件差且多变,土壤肥力贫瘠.严重的水土流失、干旱和土壤肥力低下是导致该区山坡地生产力低下的主要因素,因此,采取水土保持耕作技术,控制水土流失和合理增加肥料投入是提高山坡地土壤肥力和生产力的重要途径.
- Abstract:
- The status of soil fertility and productivity of the hillside fields in the first sub-re-gionof the loess hilly region has been analyzed in this paper on the basis of the investigationand research.The factors affecting the soil fertility and productivity of the hillside fields havealso been probed.The contents of soil organic matter,total nitrogen and available nitrogenwere lower in the hillside.fields.Although the content of soil total phosphorous and potassiumis high,their availability is not higher.The soil moisture condition is poor and readily various.These features show that the soil fertility is barren due to the long-term soil erosion in thiszone.The severe soil and water loss and drought as well as infertile soil are the dominantreasons to result in the 1ower productivity of the hillside fields.In order to raise the productivityin the hillside fields,some measures,including conservation-oriented cultivation technique,control of soil and water and input of fertilizer,should be taken in the farming practice.
参考文献/References:
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备注/Memo
收稿日期:1998-9-15。
基金项目:黄委会水土保持科学研究基金(95-04-01);国家“九五”科技攻关(95-04-12)