[1]陈乃政,曲继宗,王征兰.王家沟流域低产田的改造与培肥[J].水土保持研究,1989,(01):103-109.
Chen Naizheng,Qu Jizhong,Wang Zhenglan.Amelioration and Fertilization of Low Productive Land in Wangjiagou Watershed[J].Research of Soil and Water Conservation,1989,(01):103-109.
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Chen Naizheng,Qu Jizhong,Wang Zhenglan.Amelioration and Fertilization of Low Productive Land in Wangjiagou Watershed[J].Research of Soil and Water Conservation,1989,(01):103-109.
王家沟流域低产田的改造与培肥
《水土保持研究》[ISSN:1005-3409/CN:61-1272/P]
卷:
期数:
1989年01期
页码:
103-109
栏目:
出版日期:
1900-01-01
- Title:
- Amelioration and Fertilization of Low Productive Land in Wangjiagou Watershed
- 摘要:
- 王家沟流域在综合治理的同时，从改造坡耕地入手，坚持30年梯田建设，把一片瘠薄、干旱、低产农田，建设和培肥成为旱涝保收，高产稳产农田，为黄土高原坡耕地治理树立了典范，积累了丰富经验。本文通过多年观测、调查资料，全面分析总结了王家沟流域梯田建设培肥的经验与效益，为坡地修梯田、低产变高产提供科学依据。
- Abstract:
- Wangjiagou watershed has a total area of 9.1 square kilometers.Before the soil loss control measures were practiced, 99% of the 5810 mu cropping land was slope land with a yearly average water loss of 13 m3/mu and soil loss of 4.5 tons/mu.Soil and water loss as well as insufficient fertilizer supply result in decreased land productivity.Organic matter content in the top soil is only 0.3 to 0.4% with a grain yield of 50 to 70 kg/mu.In 1958, terracing slope land was started in this watershed.During the past three decades, 3500 mu of terrace (including man-made terrace of 1000 mu) has been built, which reduces soil and water loss by more than 90%.To increase grain yield and fertilize land as soon as possible after its terracing, a series of high productive measures including deep tillage, increased supply of fertilizer, chemical fertilizer and ferrous sulphate, and adoption of outstanding crops etc.are used and combined with other agricultural techniques to make the annual yield of new terrace more than 200 kg/mu in the year it is built.This yield is 1.4 times of that on slope land.Fertilization of newly built terrace requires years to accumulate soil nutrient.Generally speaking, organic matter in the top soil of new terrace could returns to and exceeds that in slope land top soil within one or two years, increases to 0.6 to 0.7% within four to six years, and reaches 0.8 to 1.0% after seven years.The economic benefit of terracing is notable: net income can be 101.6 Yuan/mu, which is 1.8 times higher than that from slope land.
更新日期/Last Update:
1900-01-01