MIAO Shu-jie,QIAO Yun-fa,HAN Xiao-zeng.RELATIONSHIP BETWEEN ROOT CHARACTERS AND PHOSPHORUS ABSORPTION IN SOYBEAN[J].Soybean Science,2007,26(01):16-20.[doi:10.3969/j.issn.1000-9841.2007.01.005]
大豆根系特征与磷素吸收利用的关系
- Title:
- RELATIONSHIP BETWEEN ROOT CHARACTERS AND PHOSPHORUS ABSORPTION IN SOYBEAN
- 文章编号:
- 1000-9841(2007)01-0016-05
- Keywords:
- Soybean; Root character; Phosphorus; Absorption
- 分类号:
- S565.1
- 文献标志码:
- A
- 摘要:
- 大豆幼苗经过培养处理形成三种内磷浓度,在两种不同营养液外磷水平下进行培养,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。
- 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 exponentially with P efficiency increased.
参考文献/References:
[1]王美丽,严小龙. 大豆根形态和根系分泌物特性与磷效率[J]. 华南农业大学学报,2001,22(3):1-3.
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备注/Memo
基金项目:国家重点基础研究发展计划(973计划)(2005CB121101),黑龙江省攻关项目(GB05C201—01)资助