| 大豆根系特征与磷素吸收利用的关系 |
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| 引用本文： | 苗淑杰,乔云发,韩晓增,颜心.大豆根系特征与磷素吸收利用的关系[J].大豆科学,2007,26(1):16-20. |
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| 作者姓名： | 苗淑杰 乔云发 韩晓增 颜心 |
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| 作者单位： | 1. 中国科学院东北地理与农业生态研究所,哈尔滨,150040;大豆生物学教育部重点实验室,哈尔滨,150030;中国科学院研究生院,北京,100049
2. 中国科学院东北地理与农业生态研究所,哈尔滨,150040 |
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| 基金项目： | 国家重点基础研究发展计划(973计划)，黑龙江省科技攻关项目 |
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| 摘 要： | 大豆幼苗经过培养处理形成三种内磷浓度,在两种不同营养液磷水平下进行培养,研究大豆根系特征与磷素吸收利用之间的关系.研究发现,大豆植株体内磷对促进根系的伸长有着非常重要的作用.对于相同的内磷处理,不同外源磷对根长影响较大,外磷浓度越高根长越短,尤其在磷处理后的第3周,S2和S3内磷水平的处理,从P2降低到P1水平时,根长分别增加了5.2%和30.1%.在无外磷的条件下,不同内磷浓度对根表面积的影响从磷处理后的第2周开始均达到了5%的显著水平,而施加外磷的处理,只有在磷处理后的第4和第5周,才达到5%的差异显著水平.在所有的取样时期,植株干生物量与磷效率比值没有达到显著水平,但是,随着磷效率比值的增加,达到0.40以后,植株干生物量随着磷效率比值的增加而增加.植株磷效率比值与含磷量之间达到了1%的显著水平,随着磷效率比值的增加,植株体内含磷量呈指数下降.
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| 关 键 词： | 大豆 根系特征 磷 吸收利用 |
| 文章编号： | 1000-9841（2007）01-0016-05 |
| 修稿时间： | 2006-04-11 |
RELATIONSHIP BETWEEN ROOT CHARACTERS AND PHOSPHORUS ABSORPTION IN SOYBEAN |
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| MIAO Shu-jie, QIAO Yun-fa, HAN Xiao-zeng.RELATIONSHIP BETWEEN ROOT CHARACTERS AND PHOSPHORUS ABSORPTION IN SOYBEAN[J].Soybean Science,2007,26(1):16-20. |
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| Authors: | MIAO Shu-jie QIAO Yun-fa HAN Xiao-zeng |
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| Institution: | 1. Northeast Institute of Geography and Agricultural Ecology, CAS, Harbin 150040 ; 2. Key Laboratory of soybean Biology of Ministry of Education, Harbin 150030; Graduate College, CAS, Beijing, 100049 |
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| Abstract: | Soybean seedlings, which cultured for three internal phosphorus concentration, grown in solution culture for 5 weeks, were used to study the relationship between root character and P absorption. Results suggested internal P induced root growth. In the same internal P treetment, external P affected root length and which decreased with P further increase. Especially, on 3 week after P treated, root length of S2 and S3 increased separately 5.2% and 30.1%. Without P treatment, the effect of internal P on root surface obtained 5% significant level from 2nd week. However, treatment added P up to 5% significant level only on 4th and 5th week. At all harvest time, dry weight of biomass and P efficiency did not up to significant level, but when P efficiency was above 0.40, dry weight of biomass increased as P efficiency increased. The relationship between P efficiency and P content up to 1% significant level, P content decreased exponentiallywith P efficiency increased. |
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| Keywords: | Soybean Root character Phosphorus Absorption |
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