| Cite this article: | 李汉常,谭歆,李宗浩,等.施磷量和灌溉方式对水稻磷素吸收利用的影响[J].灌溉排水学报,0,():-. |
| LI Hanchang,TAN Xin,LI Zonghao,et al.施磷量和灌溉方式对水稻磷素吸收利用的影响[J].灌溉排水学报,0,():-. |
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| The effects of phosphorus application and irrigation method on the uptake and utilization of phosphorus in rice |
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LI Hanchang, TAN Xin, LI Zonghao, ZHONG Cheng, LI Yan, YI Dali, ZHANG Wenping
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College of Hydraulic and Civil Engineering,Hunan Agricultural University
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| Abstract: |
| 【Background】Phosphorus(P) application and irrigation method has been two major factors for improving the growth and development of rice and P uptake efficiency.【Objective】 The objective is to investigate the interaction effects of P application and irrigation method on the P uptake and utilization in rice at the tillering and jointing stage.【Method】A pot experiment was conducted using a hybrid rice C liangyou 608 as tested material. Four P(P2O5) levels of 0、0.18、0.36、0.54g/Kg，and two irrigation regimes, including alternate wet and dry irrigation(AI), alternate wet and dry and oxygenated irrigation (AO) were designed. The changes of available P content in soil and P absorption characteristics of plants at the tillering and jointing stage and their correlation were studied systematically. 【Result】Whether at the tillering stage or jointing stage, the P uptake content in above-ground parts of rice was higher than that in underground part, and the P uptake content in tissues and the P accumulation in rice plant at the jointing stage were higher than that at the tillering stage. P application and irrigation methods all had a significant difference on the P uptake content in rice tissues, the P accumulation content in plants, and the available P content in soil and P uptake efficiency(P＜0.01), but the interaction of P application and irrigation had a significant difference on the P uptake content in rice tissues, the P accumulation content in plants, the available P content in soil ,and P uptake efficiency at the tillering stage(P＜0.01). The available P content in soil under alternate wet and dry irrigation was significantly positively correlated with the P accumulation in plants and the P uptake content in rice tissues. Irrigation method significantly increased the P absorption in rice roots. The available P content in soil was negatively correlated with P uptake efficiency at the jointing stage under alternate drought and aerated irrigation. 【Conclusion】Our study implies that, under the test conditions, the interaction of AO and 0.36 g/kg P application is the optimal irrigation mode, the P accumulation content of rice at the jointing stage shows the highest value. |
| Key words: rice; irrigation method; available P content in soil; the P uptake content; the P accumulation content; P uptake efficiency |
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