| 水稻对氮素的吸收、分配及其在组织中的挥发损失 |
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| 引用本文： | 黄见良,邹应斌,彭少兵,R.J Buresh.水稻对氮素的吸收、分配及其在组织中的挥发损失[J].植物营养与肥料学报,2004,10(6):579-583. |
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| 作者姓名： | 黄见良 邹应斌 彭少兵 R.J Buresh |
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| 作者单位： | 1.null |
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| 基金项目： | 国际水稻研究所RTOP项目，国家自然科学基金 |
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| 摘 要： | 应用15N示踪技术研究了水稻不同生育期吸收的15N在各器官中的分配,以及后期植物组织中的挥发损失。结果发现,水稻在分蘖期吸收的氮量少于在幼穗分化期吸收的氮量;在分蘖期吸收的15N,标记结束时氮素主要分配于水稻的叶片中,至成熟期15N有39%转运至水稻子粒中;水稻在幼穗分化期吸收的15N,标记结束时氮素主要分配在水稻茎和叶鞘中,至成熟期15N有46%转运至水稻的子粒中;水稻在分蘖期和幼穗分化期吸收的氮素在后期可以通过植株组织挥发损失,至成熟期损失的比例分别达16.7%和13.4%。
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| 关 键 词： | null |
| 文章编号： | 1008-505X(2004)06-0579-05 |
| 修稿时间： | 2003年11月24 |
Nitrogen uptake,distribution by rice and its losses from plant tissues during |
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| R.J Buresh.Nitrogen uptake,distribution by rice and its losses from plant tissues during[J].Plant Nutrition and Fertilizer Science,2004,10(6):579-583. |
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| Authors: | RJ Buresh |
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| Affiliation: | 1.Crop Physiology and Productioncm Center;Huazhong Agric. Univ.;Wuhan 430070;China; |
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| Abstract: | To determine the nitrogen uptake, distribution and N losses from plant tissues at various growing stage by rice plant, solution culture experiments using ()~(15)N tracer technique was conducted at IRRI in Philippines. The results showed that the total nitrogen uptake at panicle initiation (PI) was significantly greater than that at mid-tillering(MT) stage; (()~(15)N) was mostly distributed to rice leaves at MT, and only 39% of ()~(15)N which being absorbed at MT was transmitted to grains at maturity; ()~(15)N was mostly distributed to stems and leaf-sheathes at PI, and 46% of ()~(15)N uptake at PI was transmitted to grains at maturity; According to the ()~(15)N balance at maturity, it was found that the losses of nitrogen from plant tissues were 16.7% and 13.4% while ()~(15)N absorbed at MT and at PI separately, in the duration from ()~(15)N labeling to maturation. |
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| Keywords: | rice ~(15)N tracer technique uptake and distribution losses of nitrogen |
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