期刊论文

中文

湖南农业大学学报(自然科学版)

1007-1032

1993

06

532-539

10.13331/j.cnki.jhau.1993.06.006

国家自然科学基金；

本校为第一机构

应用~(15)N,~(14)C 示踪技术研究了亚种间杂交组合的氮素营养、光合特性与物质生产的关系.结果表明,亚种间杂交组合P 对氮素的吸收以中期最高(65.91%),前期次之(17.56%),后期最少(16.51%).约1/5来源于当季所施用的肥料氮,约4/5来源于土壤氮.对~(15)N 标记肥料氮的吸收随着生育期的推移而逐渐减少,而对土壤氮的吸收则随着生育期的推移而逐渐增加.氮素在稻株体内的分配,以穗部最高(61.86%),茎叶次之(30.93%),根部最少(7.19%).组合S 与组合P相仿.氮素在稻草中的分配,组合P 高于组合S,而在稻谷中的分配,组合P 则低于组合S.~(14)C 同化物滞留于标记叶(源叶)的量,组合P 显著地高于组合S(4.51%(?)),而转...

The result of the experiment with ~(15)N and ~(14)C labeling shows that for two-line hybrid rice subspecies P(P),17.56%,65.91% and 16.51% of total absorbed N wasaccumulated in early,midst and late growth stager respectirely;and the total absorbed Nwas 1/5 from fertilizer N and 4/5 from soil N.The rate of N absorbed from fertilizer Ndecreased with growth,while the rate of N absorbed from soil N increased.In addition,therate of N distribution in ears was the highest,amounting to 61.86% of total N absorbed;thesecond was in stems and leaves.30.93%;the least was in roots,only 7.19%.Three-linehybrid...