摘要： 为探明缓控释尿素对水稻倒伏及产量的影响，以辽宁省内广泛推广的水稻品种美锋9和辽粳3为试验材料，采用大田试验，围绕植株茎秆性状、物理特性、化学成分含量和稻米品质等指标研究不同缓控释肥处理对水稻个体和群体稻谷产量及品质的响应。结果表明，两品种在处理2和处理5时的群体产量较对照均增加7%以上，增产效果显著；使茎秆基部N1节间变短，株高有所降低；茎粗、茎壁厚、茎鞘干质量均极显著增加；茎秆干质量增加，充实度加强。结果表明，改善叶片配置，合理控制茎粗而注重提高壁厚和充实度以保证茎秆抗折力和输导能力，可保证植株较好的抗倒伏性能，进一步提高水稻产量；随着茎秆基部节间显著缩短、穗下节间显著变长，茎鞘的K、Si含量极显著增加，N含量显著降低。抗倒伏能力增强，生产力提高；由于茎秆物理性状的改善及化学成分的差异导致茎秆综合抗折力明显提高，倒伏指数降低。

关键词: 水稻, 缓释尿素, 倒伏, 产量, 品质

Abstract: Two Early japonica varieties called Meifeng 9 and Liaojing 3 in Liaoning province were used as test materials to carry out field experiments. In order to research the effects of Slow-releasing urea on rice lodging and yield. We measured the physical properties, mechanical properties and chemical composition content in plant stalks and rice quality indicators such as grain yield responses under different treatments in rice. The results indicated that treatment 2 and 5 to make the output of two varieties increased by more than 7% than control, Compared with others, the increase of yield was significantly. The results indicated that treatment 2 and 5 could increase the rice yield effectively under the condition of high planting density.Plant height of two varieties showed lowest in treatment 6 and 3,which indicated that Slow-releasing urea one-time into could effectively reduce the plant height.We achieved the purpose of dwarf.Treatment 2 and 5 make stem base internode N1 shorter,plant height reduced;Stem basal internode was significantly reduced and significantly longer peduncle under treatment 2 and 5.K,Si content of stem sheath significantly increased,significantly reduced N content.Lodging resistance ability enhancement,productivity.Correlation analysis results showed that the flexural strength and the plant height,stem diameter,stem thickness,leaf sheaths,dry weight,unit internode dry weight,the contents of K,Si and Si/N were significantly or extremely significantly positive correlation,and N1 internode length,stem were very significant negative correlation N content.Production and stem diameter,stem thickness,leaf sheaths,dry weight,unit internode dry weight,the contents of K,Si and Si/N were significantly or extremely significantly positive correlation,and stem N content was significantly negative correlation.Different Slow-releasing urea for response to less effect on the rice appearance quality,also to the influence of amylose and protein were not reached significant level,treatment 2 and 5 significantly increased the rice quality,brown rice rate,and the whole polished rate increased slightly.

Key words: Rice, Slow-releasing urea, Lodging, Yield, Quality

中图分类号: 

• S513.01