摘要
采用14个在不同时期推广的冬小麦品种进行试验,发现有时期品种氮素的吸收累积动态一致。在开花至成熟期,早期品种(40年代和50年代品种)氮素的吸收量较近期品种少;开花期内氮素在穗中的分配比例早期品种低于近期品种;成熟期内滞留在营养器官中的氛素量高于近期品种。随着品种演替,旗叶、茎杆和叶鞘中的氮素输出率增加,而输出氮的贡献率则与此相反。
In this paper, fourteen winter wheat (Triticum aestivum. L. )cultivar which had been spreaded in different decades were used. The results showed that the trends on nitrogenabsorption and accumulation among winter wheat cultivars spreading in different periods were idenified from flowering to maturity, the amount of nitrogen absorption in earlier cultivars (40S and 50'S)was less than that in recent ones, and so was nitrogen participation ratio in spike during flowering. Then, residental nitrogen in vegetative organs in earlier cultivars was more than that in recent ones. Nitrogen output rate from flag leaf, stem and leaf sheath were increasing,but nitrogen contribution rate was decreasing with varietal development.
出处
《河北农业大学学报》
CAS
CSCD
北大核心
1998年第3期23-29,共7页
Journal of Hebei Agricultural University
基金
院青年自然基金
关键词
品种演替
氮素吸收量
氮素分布
冬小麦
Varietal development
Nitrogen absorption amounts
Nitrogen distribution