| Cite this article: | 何军,何天楷,张宇航,等.不同水肥处理水稻氮磷吸收利用及产量试验研究[J].灌溉排水学报,0,():-. |
| HE Jun,HE Tiankai,ZHANG Yuhang,et al.不同水肥处理水稻氮磷吸收利用及产量试验研究[J].灌溉排水学报,0,():-. |
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| Experimental Study on N and P Absorption and Utilization and Yield of Rice under Different Water and Fertilizer Treatments |
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HE Jun,HE Tiankai,ZHANG Yuhang,et al
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1.College of Hydraulic & Environmental Engineering, China Three Gorges University;2.Engineering Research Center of Ecoenvironment in Three Gorges Reservoir Region, Ministry of Education, China Three Gorges University,;3.Hubei Zhanghe Hydranlic Project Administration Bureau
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| Abstract: |
| 【Background】The utilization efficiency of fertilizers in rice cultivation in China is low.【Objective】To seek the regulation mode of rice to water and fertilizer with high efficiency of fertilizer utilization.【Method】Two irrigation modes: W1-flood irrigation, W2-alternate wetting and drying, as well as two types of fertilization: N1-conventional fertilizer, N2-slow-release fertilizer, were carried out in rice pit test.【Result】The results showed that the nitrogen harvest index (NHI) of the plants treated with slow-release fertilizer reached 69.0% (W1) and 71.6% (W2), which were2.8% and 7.5% higher than the conventional fertilizer treatment of 66.2% and 64.1%, respectively; phosphorus harvest index (PHI) reached 84.1% (W1) and 86.7% (W2), which were 0.5% and 4.4% higher than 83.6% and 82.3% of conventional fertilizer treatment, respectively. The partial productivity of nitrogen and phosphorus fertilizers applied to slow-release fertilizer plants under alternate wetting and drying mode were 58.4kg/kg and 145.9kg/kg, which were 1.2% and 1.1% higher than that of flood irrigation mode. The grain yield also reached the maximum value of 10505kg /hm2 which was 1.1% higher than the yield of 10386kg/hm2 under the treatment of flood irrigation slow-release fertilizer.【Conclusion】Alternate wetting and drying and slow-release fertilizer mode can improve fertilizer utilization and increase crop yield. |
| Key words: water and fertilizer treatment, total nitrogen, total phosphorus, yield |
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