| 应用15N尿素研究氮素在幼龄橡胶树中吸收和分配特性 |
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| 引用本文： | 王文斌,郭海超,罗雪华,吴小平. 应用15N尿素研究氮素在幼龄橡胶树中吸收和分配特性[J]. 热带作物学报, 2011, 32(1): 7-10. DOI: 10.3969/j.issn.1000-2561.2011.01.002 |
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| 作者姓名： | 王文斌 郭海超 罗雪华 吴小平 |
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| 作者单位： | 1. 中国热带农业科学院橡胶研究所,农业部橡胶树生物学重点开放实验室,海南儋州571737;海南大学农学院,海南儋州571337
2. 中国热带农业科学院橡胶研究所,农业部橡胶树生物学重点开放实验室,海南儋州571737 |
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| 基金项目： | 中国热带农业科学院橡胶研究所基本科研业务费(xjszx-04); 公益性行业科研专项经费 |
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| 摘 要： | 通过同位素示踪技术研究了不同时期幼龄橡胶树对15N标记尿素的吸收和分配特性。结果表明:顶蓬嫩叶和成熟叶从氮肥中吸收分配到的15N的量,对该器官全氮量的贡献率(Ndff值),随着施肥时间的延长总体均呈增加趋势;同一采样时间里顶蓬嫩叶Ndff值均大于成熟叶。落叶前后氮素在橡胶树各器官中分配差异显著。落叶前期橡胶树吸收的氮素主要分配在叶片中;落叶期橡胶树吸收的氮素则主要分配在主茎中。
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| 关 键 词： | 橡胶树 尿素 吸收量 分配率 |
Using ~(15)N-labelled Urea to Study Nitrogen Absorption and Distribution of Young Rubber Trees(Hevea brasiliensis) |
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| WANG Wenbin,GUO Haichao,LUO Xuehua and WU Xiaoping. Using ~(15)N-labelled Urea to Study Nitrogen Absorption and Distribution of Young Rubber Trees(Hevea brasiliensis)[J]. Chinese Journal of Tropical Crops, 2011, 32(1): 7-10. DOI: 10.3969/j.issn.1000-2561.2011.01.002 |
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| Authors: | WANG Wenbin GUO Haichao LUO Xuehua WU Xiaoping |
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| Affiliation: | WANG Wenbin,GUO Haichao,LUO Xuehua,WU Xiaoping Rubber Research Institute,CATAS,Danzhou,Hainan 571737 Key Laboratory of Ministry of Rubber Biology,Ministry of Agriculture,Hainan 571737 2 College of Agriculture University,Hainan,571737 China |
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| Abstract: | Absorption and distribution of 15N-labelled urea in different parts of young rubber tree were studied by using 15N trace technique.Results showed that Ndff of newly developed top leaves and mature leaves both increased with the extended application time,and Ndff of newly developed top leaves was higher than that of mature leaves at the same sampling time.There was significant difference in the nitrogen distribution of various organs of rubber tree between pre-defoliation period and defoliation period.Fertil... |
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| Keywords: | Rubber tree Urea Absorption amount Distribution rate. |
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