| 引用本文: | 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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| 摘要: |
| 【目的】探明施磷量和灌溉方式对水稻分蘖期、拔节孕穗期磷素吸收利用的影响。【方法】以杂交稻C两优608为材料进行盆栽试验，分别设置P1(0 g/kg)、P2(0.18 g/kg)、P3(0.36 g/kg)、P4(0.54 g/kg) 4个磷施用水平，及干湿交替灌溉(AI)、增氧+干湿交替灌溉( AO) 2种灌溉方式，系统比较研究了分蘖期及拔节孕穗期水稻土壤有效磷含量、植株磷素吸收特性的变化及其相关性。【结果】无论分蘖期或拔节孕穗期，地上部磷吸收量均高于地下部的，拔节孕穗期各器官磷吸收量、植株磷累积量均高于分蘖期的。施磷、灌溉方式对水稻各器官磷吸收量、植株磷累积量、土壤有效磷含量及磷肥吸收利用率影响极显著（P＜0.01）；施磷与灌溉互作对各器官磷吸收量、植株磷累积量、土壤有效磷含量及分蘖期磷素吸收利用率影响极显著（P＜0.01）。干湿交替灌溉下土壤有效磷含量与植株磷累积量、各器官磷吸收量极显著正相关；灌溉方式显著提高水稻根系对磷素的吸收量； 增氧+干湿交替灌溉方式下拔节孕穗期土壤有效磷含量与磷素吸收利用率显著负相关。【结论】试验条件下，增氧+干湿交替灌溉方式配施磷量0.36 g/kg为最佳灌溉模式，水稻拔节孕穗期植株磷累积量最高。 |
| 关键词: 水稻;灌溉方式;土壤有效磷含量;磷吸收量;磷累积量;磷素吸收利用率 |
| DOI： |
| 分类号:S 152.7 |
| 基金项目:国家自然科学基金(51909088)；湖南省科技计划项目(2018JJ3243)；湖南省教育厅重点项目(19A213、17A094) |
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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 |
