| 摘要: |
| 以大穗型粳稻品种豫粳6号为材料,在孕穗和结实期采用不同的灌溉处理和穗肥施用方式,研究水氮互作对籽粒灌浆速率、籽粒充实度及产量构成因素的影响。结果表明:水分和穗肥一定的条件下,随着穗肥施入时期的推迟及后期施肥量的增大,稻穗的千粒重和籽粒充实度出现逐渐变大的趋势。倒2叶期施肥在一定程度上增强了籽粒灌浆后期的灌浆速率,缩短了强势粒的灌浆时间。干湿交替的灌溉方式可以改善弱势粒灌浆的滞后性,显著提高弱势粒的灌浆速率。干湿交替和倒2叶期施肥的水氮组合显著提高了弱势粒二次枝梗的平均灌浆速率及最大灌浆速率,从而提高了水稻的千粒重、籽粒充实度及产量,为最佳的水氮运筹方式。 |
| 关键词: 水稻 灌溉方式 穗肥施用 产量 灌浆速率 |
| DOI：10.11841/j.issn.1007-4333.2011.03.007 |
| 投稿时间：2010-10-13 |
| 基金项目:河南省科技创新人才支持计划项目(094200510003); 教育部新世纪优秀人才支持计划项目(NCET-08-0663);河南省高校科技创新团队支持计划项目(2010IRTSTHN005) |
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| Effects of water-nitrogen interaction on ricegrain plumpness and yield |
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LI Jun-zhou1, LI Lei1, SUN Chuan-fan2, ZHAO Quan-zhi1, DU Yan-xiu1, ZHANG Jing1, PENG Ting1
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| (1.The Incubation Base of National Key Laboratory for Physiological Ecology and Genetic Improvement of Food Crops,Henan Agricultural University,Zhengzhou 450002,China;2.China Rural Technology Development Center,Beijing 100045,China) |
| Abstract: |
| A field experiment was conducted to investigate the effects of irrigation methods (irrigation at the 4th leaf-age from top,irrigation at the 2nd leaf-age from top,and wetting-drying alternation irrigation) and application of panicle fertilization (application at the 4th leaf-age from top,two equal application at the 4th and the 2nd leaf-age from top,and application at the 2nd leaf-age from top) and its combinations on rice grain filling,plumpness and yield related traits at ooting and grain-filling stages using Japonica rice variety Yujing 6 (large spike). The results showed that 1000-grain weight and grain plumpness increased gradually with delaying fertilizer application and increasing panicle fertilization under the certain amount of water and nitrogen.Application of panicle fertilization at the 2nd leaf-age from top increased the grain filling rate at late grain filling stage and shortened the time of superior grain filling.Wetting-drying alternation irrigation greatly increased the filling rate and improved the hysteretic nature of the grain filling of inferior grains.Wetting-drying alternation irrigation with the application of panicle fertilization at the 2nd leaf-age from top was the ideal management regime,which increased thousand kernel weight,grain plumpness and yield by greatly improving the mean grain filling rate and maximum grain filling rate of the secondary branch grain of inferior grains. |
| Key words: rice irrigation methods application of panicle fertilization yield grain filling rate |
