沈阳农业大学学报2017，Vol.48Issue(6)：647-653,7.DOI:10.3969/j.issn.1000-1700.2017.06.002
施氮量对旱直播粳稻抗倒伏性及产量的影响
Effect of Nitrogen Application on Lodging Resistance and Yields of Japonica Rice under Drill Seeding
摘要
Abstract
In order to explore the effect of nitrogen application on lodging resistance and yields of different japonica rice cultivars under drill seeding, the japonica rice cultivars Shendao 528, Shendao 305 and Shendao 529 were used as the entries to study the relationships between the mechanic features, physical traits of the internodes, the panicle type and the lodging resistance at the 25d and 40d after full heading. The results showed that at 0 kg·hm-2 level of nitrogen application, the lodging index of erect panicle type cultivar Shendao 528 was the smallest on 40d, the lodging index of semi-erect panicle cultivars Shendao 305 was the largest and the lodging index of the semi-erect panicle cultivar shendao 529 was the smallest on 25d. After application of nitrogen fertilizer, the internode length increased and the cross-sectional area decreased; the breaking resistance decreased significantly and the lodging index increased significantly with the increase of nitrogen application. The lodging index on 40d after full heading was higher than that on 25d. The resistance of erect panicle type cultivar Shendao 528 was affected by panicle type factor slightly, and the neck-panicle angle of Shendao 305 and Shendao 529 increased significantly with the increase of nitrogen application rate. The yield increased first and then decreased with the increase of nitrogen application rate, and the yield was the highest at 150kg·hm-2 level. The effective panicle per unit area increased first and then decreased with the increase of nitrogen application rate, being consistent with yield performance, so the effective panicle number per unit area determines the yield of rice. Therefore, increasing the breaking resistance of stem is an important way to improve the lodging resistance of rice, and the yield of drill seeding japonica rice is improved by selecting varieties with high breaking resistance and increasing the effective panicle per unit area to increase the yield with the proper nitrogen application rate.关键词
旱直播/粳稻/施氮量/抗折力/倒伏指数/产量Key words
japonica rice/drill seeding/nitrogen application rate/breaking resistance/lodging index/yield分类
农业科技引用本文复制引用
肖楠,王术,董立强,丛琳,孙晓森,周婵婵,王宇智,谷宇,贾宝艳,黄元财..施氮量对旱直播粳稻抗倒伏性及产量的影响[J].沈阳农业大学学报,2017,48(6):647-653,7.基金项目
国家重点研发计划课题粮食丰产增效科技创新项目(2016YFD0300104) （2016YFD0300104）
