| 楸树无性系苗期氮素分配和氮素效率差异 |
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| 引用本文： | 麻文俊,王军辉,张守攻,马建伟,董菊兰.楸树无性系苗期氮素分配和氮素效率差异[J].植物营养与肥料学报,2011,17(5):1256-1261. |
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| 作者姓名： | 麻文俊 王军辉 张守攻 马建伟 董菊兰 |
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| 作者单位： | 1. 中国林业科学研究院林业研究所,国家林业局林木培育重点实验室,北京100091
2. 甘肃省小陇山林业科学研究所,甘肃天水,741022 |
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| 基金项目： | “十一五”国家科技支撑课题(2006BAD24B08); 农业成果转化资金项目(2008GB24320414)资助 |
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| 摘 要： | 为开展氮素高效型楸树(Catalpa bungei)无性系的选育,选取10个楸树无性系进行了高氮 （+N）和低氮 （-N）条件下植株体内氮素的分配和氮素效率差异研究。结果表明,-N下,大部分氮的分配为根＞叶＞茎;而+N下则相反,氮素的分配为叶＞茎＞根,且无性系间差异较小。+N下无性系的氮素效率极显著高于-N,且-N下无性系间的变异程度较高;氮素吸收效率和氮素利用效率都是-N下的变异程度较高,增加氮素用量可显著提高氮素吸收效率,但氮素利用效率显著降低。相关性分析可知,氮素吸收效率对氮素效率的贡献大于氮素利用效率。在两种氮条件下,无性系2-7和015-1的氮素效率较高。
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| 关 键 词： | 楸树 无性系 氮素分配 氮素效率 |
| 收稿时间： | 2010-11-18 |
Nitrogen distribution and efficiency difference of Catalpa bungei C.A.Mey. clones at nursery stage |
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| MA Wen-jun,WANG Jun-hui,ZHANG Shou-gong,MA Jian-wei,DONG Ju-lan.Nitrogen distribution and efficiency difference of Catalpa bungei C.A.Mey. clones at nursery stage[J].Plant Nutrition and Fertilizer Science,2011,17(5):1256-1261. |
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| Authors: | MA Wen-jun WANG Jun-hui ZHANG Shou-gong MA Jian-wei DONG Ju-lan |
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| Institution: | MA Wen-jun1,WANG Jun-hui1*,ZHANG Shou-gong1,MA Jian-wei2,DONG Ju-lan2(1 Research Institute of Forestry,Chinese Academy of Forestry/Key Laboratory of Tree Breeding and Cultivation,State Forestry Administration,Beijing 100091,China,2 Xiaolongshan Forestry Research Institute,Tianshui,Gansu 741022,China) |
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| Abstract: | In order to develop the high nitrogen efficiency Catalpa bungei C.A.Mey clones,an experiment was carried out to observe nitrogen distribution characteristics and nitrogen efficiency of ten Catalpa bungei C.A.Mey clones treated with the high(+N) and low(-N) nitrogen.The results showed that more nitrogen distributed to the underground part(root>leaf>stem) under the low nitrogen treatment,while situations under the high nitrogen treatment was contrary(leaf>stem>root).There was no significant difference on nitr... |
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| Keywords: | Catalpa bungei C A Mey clones nitrogen distribution nitrogen efficiency |
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