应用生态学报2011，Vol.22Issue(2)：369-375,7.
小麦氮素利用效率的基因型差异
Genotype difference in nitrogen utilization efficiency of wheat.
摘要
Abstract
A pot experiment with 130 wheat cultivars was conducted to study their genotype differ ence in biomass per plant, nitrogen accumulation, and nitrogen production efficiency under the same level of nitrogen supply, aimed to screen the high efficiency nitrogen-utilizing wheat geno types. The results showed that the biomass per plant of the cultivars at jointing, heading, and matu ring stages was within the ranges of 1. 06-3. 08 g, 1. 88-9. 05 g, and 2. 64-13. 75 g, respective ly, and the yield per plant was 1. 38-9. 90 g. The nitrogen dry matter production efficiency was 25. 62-65.41 g · g-1 N (F= 5. 099** ) at jointing stage and 35. 79 -88. 70 g · g-1 N (F= 5. 325 * * ) at heading stage, and the nitrogen production efficiency of grain yield was 19. 06-38. 54 g · g-1 N (F=4. 669* * ) at maturing stage. There were significant differences in nitrogen dry mat ter production efficiency (jointing stage, F= 637. 941 ' ' ; heading stage , F=201. 173 * * ) and ni trogen grain yield production efficiency ( maturing stage, F = 443. 450* * ) . and also. in biomass accumulation among the cultivars, but no significant differences in tiller number and effective tiller number. The wheat genotypes with high nitrogen utilization efficiency had the characteristics of less ineffective tiller, high nitrogen utilization before heading stage, and high effective nitrogen absorp tion and reuse capability at heading and maturing stage. The grain yields of high nitrogen efficiency genotypes Sheng CXK027 -4 and Liangmai 4 were 2. 44 times and 1. 86 times higher than those of low nitrogen use efficiency genotype 694, and the nitrogen accumulation in grain yields was 2. 06 times and 1. 81 times higher than that of low nitrogen use efficiency genotype 694, respectively.关键词
小麦/氮素利用效率/动态聚类/籽粒产量分类
农业科技引用本文复制引用
张锡洲,阳显斌,李廷轩,余海英..小麦氮素利用效率的基因型差异[J].应用生态学报,2011,22(2):369-375,7.基金项目
国家自然科学基金项目(40901138)和国家科技支撑计划项目(2008BAD98B03)资助. （40901138）
