期刊论文

中文

作物学报

0496-3490

2010

36

2

321-326

10.3724/SP.J.1006.2010.00321

30971860:国家自然科学基金 07JJ3074:湖南省自然科学基金重点项目 nyctx-00509:国家油菜产业技术体系项目 2006BAD21B030:国家高技术研究发展计划（863计划） 2009FJ1006-1;2009FJ1006-3:国家科技重大专项 09K049:湖南省高等学校创新平台开发基金

本校为第一机构

在Hoagland完全营养液的沙培条件下,采用~(15)N示踪方法,研究了两个冬油菜品种不同生育期吸收的氮素在体内的分配、转运及损失情况.结果表明(两个品种平均值),83.5%苗期吸收的氮素和66.3%蕾薹期吸收的氮素分布在叶片中;79.1%开花期吸收的氮素分布在叶片和茎中,其中叶片中分布的氮占42.8%;而角果发育期吸收的氮素有42.4%直接分配到角果中,此时角果已成为氮素直接分配的比例最大的器官.苗期、蕾葶期、开花期和角果发育期吸收的氮素从营养器官向生殖器官的转运比例分别为34.4%、44.3%、41.2%和31.7%,单株转运量分别为203.2、325.8、218.0和82.0 mg.在籽粒全氮中转运氮占65.1%,其中蕾薹期吸收后转运...

The differences of concentration and distribution of nitrogen in crop depend on organs and growth stages, and nitrogen redistribution in different organs will be occurred at different stages; these differences are related to the transfer of growth center. Consequently, the high crop yield depends not only on the high amount of nitrogen absorption, but also on the high efficiency of nitrogen redistribution. The objective of this study was to reveal the law of nitrogen absorption, distribution, and translocation in oilseed rape plant at different...