Nitrogen Management and Fertilizer Use Efficiency for Lowland Rice in Pakistan
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概要
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With a view to develop simpler techniques for improving the efficiency of nitrogen fertilizer use for lowland rice, field studies were conducted in 1986 and 1987. During 1986, dry soil incorporation of urea was compared with puddled soil application of urea and calcium ammonium nitrate (CAN) and deep placement of urea super granule (USG). In 1987, the application of urea in puddled soil without standing water (soil saturation) was compared with the application in standing water and deep placement of USG. The results revealed that deep placement of USG and dry soil incorporation of urea were comparable in their effect on the increase of the number of productive tillers, straw and paddy yield, and agronomic efficiency. Consequently N utilization and recovery efficiency were higher with these methods of fertilizer application than with the application of urea and CAN in puddled soil. Application of urea fertilizer under soil saturation conditions and deep placement of USG were found to be comparable in the production of tillers, straw and grain yield and both gave similar agronomic and N recovery efficiencies to the application of urea on the Miranpur soil under standing water conditions.
- 社団法人日本土壌肥料学会の論文
著者
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Gill M
Land Resources Section National Agricultural Research Centre
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Aslam M
Land Resources Section National Agricultural Research Centre
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Zia Muhammad
Laboratory of Soil Science, Faculty of Agriculture, Kyoto University
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Aslam Muhammad
Land Resources Section, National Agricultural Research Centre
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Gill Maqsood
Land Resources Section, National Agricultural Research Centre
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Zia Muhammad
Laboratory Of Soil Science Faculty Of Agriculture Kyoto University
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Gill Maqsood
Land Resources Research Institute National Agricultural Research Centre
関連論文
- Integrated Use of Organic Manures and Inorganic Fertilizers for the Cultivation of Lowland Rice in Pakistan
- Nitrogen Management and Fertilizer Use Efficiency for Lowland Rice in Pakistan
- Evaluation of Phosphorus Fertility Status of Calcareous Alkaline Soils under Rice Based Cropping Sequences
- Maize Growth and Uptake of Phosphate and Copper at Different Ambient Phosphate Concentrations