The Development of Copper-Coated Urea for Rice Production
Urea is the main fertilizer used in the rice production in the world. Like other N fertilizers, the efficiency of urea in rice soils generally low due to high losses through volatilization, denitrification and leaching. Slow release fertilizers can be used to minimize loss of N. The rice yields i...
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| 主要作者: | |
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| 格式: | Thesis |
| 語言: | English English |
| 出版: |
2002
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| 主題: | |
| 在線閱讀: | http://psasir.upm.edu.my/id/eprint/10610/1/FP_2002_25_A.pdf |
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| 總結: | Urea is the main fertilizer used in the rice production in the world. Like
other N fertilizers, the efficiency of urea in rice soils generally low due to high
losses through volatilization, denitrification and leaching. Slow release
fertilizers can be used to minimize loss of N. The rice yields in some area in
Malaysia are low due to Cu deficiency. The objective of this study is to
develop Cu-coated urea to increase the rice production. In this study, five
types of materials consisting chitosan, poly-vinyl chloride (PVC), palm oil
sludge (POS), neem oil (NE) and palm stearin (PS) were used as coating
materials and Cu carrier. However, due to some technical problems only
pos, NE and PS were used in this study. The source of Cu used was copper
sulphate. These Cu-coated urea fertilizers were evaluated their effectiveness
as Cu carrier and slow-release capabilities in rice soils conditions under
laboratory incubation and greenhouse studies using two types of rice soils:-
Kangar sries (Typic Endoaquert) and Kundor series (Typic Tropaquept). |
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