Effect of N fertilizer and N use efficiency under different N levels of application in high-fertility paddy field
In this paper the effect of N fertilizer and N use efficiency under different levels of N application in high-fertility paddy field in Northern Zhejiang Province was studied. The results showed that rice yield and N content of leakage water and paddy soil were greatly influenced by the amount of N f...
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| Language: | English |
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Zhejiang University Press
2006-01-01
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| Series: | 浙江大学学报. 农业与生命科学版 |
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| Online Access: | https://www.academax.com/doi/10.3785/1008-9209.2006.01.0060 |
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| author | FENG Tao YANG Jing-ping SHI Hong-xin ZHENG Hong-fu SUN Jun-hua |
| author_facet | FENG Tao YANG Jing-ping SHI Hong-xin ZHENG Hong-fu SUN Jun-hua |
| author_sort | FENG Tao |
| collection | DOAJ |
| description | In this paper the effect of N fertilizer and N use efficiency under different levels of N application in high-fertility paddy field in Northern Zhejiang Province was studied. The results showed that rice yield and N content of leakage water and paddy soil were greatly influenced by the amount of N fertilizer. The yield showed no significant variation when the applied nitrogen were within the range of 150-225 kg·hm<sup>-2</sup>. N content of leakage water and soil increased quickly with the N application up to 225 kg·hm-<sup>2</sup>, it would lead to severe non-pointing source pollution of N. The result indicated that N use efficiency was so low that uptake of N by rice efficiency was only 21.55% in average. Agronomic and physiological efficiency of N were only 7 kg·kg<sup>-1</sup> and 20 kg·kg<sup>-1</sup>, which were far below the average level of the whole nation. Considering the N use efficiency and theory of marginal profit analysis, the 140-200 kg·hm<sup>-2</sup> could be a reasonable range of nitrogen application for the high-yielding paddy field in northern Zhejiang Province. |
| format | Article |
| id | doaj-art-c7d29ba422504b4784fcbf05ace8b8a2 |
| institution | DOAJ |
| issn | 1008-9209 2097-5155 |
| language | English |
| publishDate | 2006-01-01 |
| publisher | Zhejiang University Press |
| record_format | Article |
| series | 浙江大学学报. 农业与生命科学版 |
| spelling | doaj-art-c7d29ba422504b4784fcbf05ace8b8a22025-08-20T02:47:40ZengZhejiang University Press浙江大学学报. 农业与生命科学版1008-92092097-51552006-01-0132606410.3785/1008-9209.2006.01.006010089209Effect of N fertilizer and N use efficiency under different N levels of application in high-fertility paddy fieldFENG TaoYANG Jing-pingSHI Hong-xinZHENG Hong-fuSUN Jun-huaIn this paper the effect of N fertilizer and N use efficiency under different levels of N application in high-fertility paddy field in Northern Zhejiang Province was studied. The results showed that rice yield and N content of leakage water and paddy soil were greatly influenced by the amount of N fertilizer. The yield showed no significant variation when the applied nitrogen were within the range of 150-225 kg·hm<sup>-2</sup>. N content of leakage water and soil increased quickly with the N application up to 225 kg·hm-<sup>2</sup>, it would lead to severe non-pointing source pollution of N. The result indicated that N use efficiency was so low that uptake of N by rice efficiency was only 21.55% in average. Agronomic and physiological efficiency of N were only 7 kg·kg<sup>-1</sup> and 20 kg·kg<sup>-1</sup>, which were far below the average level of the whole nation. Considering the N use efficiency and theory of marginal profit analysis, the 140-200 kg·hm<sup>-2</sup> could be a reasonable range of nitrogen application for the high-yielding paddy field in northern Zhejiang Province.https://www.academax.com/doi/10.3785/1008-9209.2006.01.0060riceeffect of N fertilizerN use efficiencypaddy field |
| spellingShingle | FENG Tao YANG Jing-ping SHI Hong-xin ZHENG Hong-fu SUN Jun-hua Effect of N fertilizer and N use efficiency under different N levels of application in high-fertility paddy field 浙江大学学报. 农业与生命科学版 rice effect of N fertilizer N use efficiency paddy field |
| title | Effect of N fertilizer and N use efficiency under different N levels of application in high-fertility paddy field |
| title_full | Effect of N fertilizer and N use efficiency under different N levels of application in high-fertility paddy field |
| title_fullStr | Effect of N fertilizer and N use efficiency under different N levels of application in high-fertility paddy field |
| title_full_unstemmed | Effect of N fertilizer and N use efficiency under different N levels of application in high-fertility paddy field |
| title_short | Effect of N fertilizer and N use efficiency under different N levels of application in high-fertility paddy field |
| title_sort | effect of n fertilizer and n use efficiency under different n levels of application in high fertility paddy field |
| topic | rice effect of N fertilizer N use efficiency paddy field |
| url | https://www.academax.com/doi/10.3785/1008-9209.2006.01.0060 |
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