| 引用本文： |
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谭宏伟,周柳强,谢如林.广西农田养分循环与平衡分析[J].广西科学院学报,2000,(2):82-86,91. [点击复制]
- Tan Hongwei,Zhou Liuqiang,Xie Rulin.Nutrient Circulation and Balance of Farm Land in Guangxi[J].Journal of Guangxi Academy of Sciences,2000,(2):82-86,91. [点击复制]
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| 摘要: |
| 以广西合浦县(桂南)、贺州县(桂东北)、来宾县(桂中)、大化县(桂西北)和田阳县(桂西)共5县30村150户及广西有关农业生产资料(1997年)分析广西农田养分循环状况。结果表明:广西农田施肥年亏缺氮肥280412.3t,钾肥507856.6t;盈余磷肥241098.23t。水田盈余氮肥51954.3t,磷肥139590.25t,亏缺钾肥4372.4t,盈余的氮肥已对水体造成污染;旱地盈余磷肥36067.79t,亏缺氮肥321372.63t和钾肥503484.13t。水田增施钾肥才能维持水田养分平衡;旱地增施氮、钾肥才能有效促进作物(如甘蔗)增产、增收。在目前产量情况下,需增施N2 80412.3t,K2O 507856.6 t,才能实现广西农田养分平衡。 |
| 关键词: 农田 养分循环 营养平衡 |
| DOI： |
| 投稿时间：1999-10-13 |
| 基金项目:自治区自然科学基金(桂科字9912014)和人事厅的资助 |
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| Nutrient Circulation and Balance of Farm Land in Guangxi |
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Tan Hongwei, Zhou Liuqiang, Xie Rulin
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| (Institute of Soil and Fertilizer, Guangxi Academy of Agricultural Sciences, Nanning, 530007) |
| Abstract: |
| The status of nutrient circulation in the farm land of Guangxi was analysed in terms of the agricultural infromation from 150 households of 30 towns of 5 counties across Guangxi which are Hepu (south),Hezhou (northeast), Laibin (middle), Dahua (northwest) and Tianyang (west). The results are as follows. There are 280400 tons of nitrogen fertilizer and 507900 tons of potassium fertilizer deficient each year in the farm land, with 311300 tons of phosphorus fertilizer surplus. For paddy fields, there are 51900 tons of nitrogen fertilizer and 139600 tons of phosphorus fertilizer surplus each year, with lacking of 4400 tons of potassium fertilizer. The surplus nitrogen is giving rise to the pollution of waters. For dry land, there are 36100 tons of phospharus fertilizer surplus each year, but lacking 321400 tons of nitrogen fertrilizer and 503500 tons of potassium fertilizer. Potassium is responsible to keep the equilibrium of nutrient in paddy fields. The dry land needs to invest more nitrogen and potassium fertilizers in order to increase outputs of crops effectively. In the current situattion, 280400 tons of nitrogen and 507800 tons of potassium fertilizers are required to maintain the nutrient circulation in Guangxi region. |
| Key words: farm land nutrient circulation nutrition balance |
