摘要
选取东北地区76份不同基因型水稻为试验材料,通过田间试验对氮效率进行分类和评价。结果表明,在两个肥力水平下,不同水稻基因型的产量表现出显著差异。根据产量变化情况,确定辽盐2号、吉粳803、辽星1号等22份水稻材料为氮高效型水稻品种,通35、沈稻12、长白15等27份水稻材料为氮低效型水稻品种。相关分析表明,两种肥力条件下产量与单位面积有效穗数都呈极显著正相关;且施氮条件下,产量与每穗粒数呈显著正相关,氮肥主要通过提高单位面积有效穗数和每穗粒数来提高水稻产量。氮高效型水稻品种的氮肥农学利用率和氮肥偏生产力显著高于氮低效型水稻品种。
Seventysix rice genotypes recently applied in northern China were used as materials and field experiment was con ducted to classify and evaluate rice genotypes with different nitrogen use efficiency （NUE）. The results showed that there was significant difference of yield among different rice genotypes at two N levels. Based on grain yield variation under two nitro gen levels, 22 rice genotypes including Liaoyan No.2, Jijing 803, Liaoxing No.1 et al had N use efficiency and 27 rice genotypes including Tong 35, Shendao 12, Changbai 15 et al had low N use efficiency. Correlation between yield and yield components showed that yield were positively correlated with effective panicle number at 0.01 level under two N levels, and with grain number per panicle at 0.05 level under high N level. N agronomic efficiency and Partial factor productivity of ap plied N of rice genotypes with high N use efficiency were higher than those of rice genotypes with low N use efficiency.
出处
《湖北农业科学》
北大核心
2014年第1期16-20,共5页
Hubei Agricultural Sciences
基金
辽宁省博士启动科研基金项目(20111085)
关键词
水稻
基因型
氮效率
分类
评价
rice
genotypes
nitrogen use efficiency
classification
evaluation
