| Cite this article: | 潘 晨,杨 宇,漆栋良.不同灌溉条件下氮肥配施模式对水稻干物质和产量的影响[J].灌溉排水学报,0,():-. |
| PAN Chen,YANG Yu,QI Dongliang.不同灌溉条件下氮肥配施模式对水稻干物质和产量的影响[J].灌溉排水学报,0,():-. |
|
| |
|
|
| This article has been：Browse 493Times Download 0Times |
|
|
|
| DOI： |
|
| Effects of Nitrogen Fertilizer Compounding Modes on Rice Dry Matter and Yield under Different Irrigation Conditions |
|
PAN Chen, YANG Yu, QI Dongliang
|
|
College of Agriculture,Yangtze University
|
| Abstract: |
| 【Objective】The effects of nitrogen fertilizer mixed application modes under different irrigation modes on rice growth, dry matter accumulation and distribution, and yield formation were studied. Provide theoretical basis and technical support for efficient management of rice water and fertilizer.【Method】With Super Rice-Liangyou 152 as the test crop, it was completely randomly designed, and the irrigation method was set up with two kinds of conventional irrigation (CF) and alternating wet and dry irrigation (AWD), and the nitrogen fertilizer mixed application mode was set up with 100% ordinary urea (N1), 60% controlled-release urea + 40% ordinary urea (N2) and 100% controlled-release urea (N3), and the total amount of nitrogen applied was 240 kg N/hm2. The SPAD values of rice leaves, plant height, dry matter quality of each organ at the panicle extraction stage and maturity stage, the total number of heads in different growth periods, the grain yield and its constituent factors at different growth stages were measured under different treatment combinations.【Result】At the same nitrogen application level, AWD can reduce ineffective tillering, increase the SPAD value from the jointing stage to the filling stage, the dry matter accumulation of plants and the proportion of distribution to the grain. At the same irrigation level, compared with N1, N2 and N3 couplings effectively reduced the SPAD values of ineffective tillering and maturity stage in late growth, and improved the number of grains per panicle, the weight of 1,000 grains and the seed setting rate, and in particular, it was more significant at the N2 level, and finally obtained the highest yield.【Conclusion】Alternate wetting and drying irrigation combined with 60% controlled release urea + 40% common urea could promote dry matter accumulation and distribution to grains of rice, thus increasing rice yield. |
| Key words: rice; alternate wetting and drying irrigation; controlled release urea; harvest index; dry matter accumulation |
|
|
|
|
|
|
