Jin Jian Wang Guanghua Liu Xiaobing Pan Xiangwen Liu Jie.INSPECTION OF N AND P UPTAKE, AND ITS DISTRIBUTION ACROSSRHIZOSPHERE ATSEEDLING STAGE OF SOYBEAN BY RHIZOBOX METHOD[J].Soybean Science,2005,24(04):281-285,290.[doi:10.11861/j.issn.1000-9841.2005.04.0281]
利用根箱法解析大豆苗期氮磷吸收及其在根际分布的特征*
- Title:
- INSPECTION OF N AND P UPTAKE, AND ITS DISTRIBUTION ACROSSRHIZOSPHERE ATSEEDLING STAGE OF SOYBEAN BY RHIZOBOX METHOD
- Keywords:
- Soybean ; Rhizosphere ; N and P ; Rhizobox method
- 文献标志码:
- A
- 摘要:
- 应用根箱法对 2 种不同大豆基因型苗期的氮、磷吸收及其在根际分布进行比较研究 。结果表明 ,高产品种北丰 11 单位根长及根表面积吸收的氮 、磷量及植株体内的氮、磷含量均高于低产品系海 9731,北丰 11 表现出较强的吸收养分能力。土壤有效氮 、磷在根际的分布趋势不同 ,根际有效氮含量高于非根际 ,而有效磷含量则低于非根际 ,但全氮和全磷的含量无明显变化 。不同基因型间,活化根际养分能力差异较大,北丰11 在0 - 8 mm 内的根际土壤有效氮 、磷含量均高于海 9731,这种差异的原因与 2 基因型根际 pH 值的差异有一定关系, 北丰 11 根际 pH 较低。
- Abstract:
- Using rhizobox method , the N and P uptake and its distribution across rhizosphere at seedlingstage in two soybean cultivar or line were investigated. The results showed that the high yielding soybeancultivar , i. e. Beifeng 11 had higher N and P uptake per root length and per root surface area than that of the low yielding soybean line, i. e. Hai 9731, and the N and P content in plant had the same trend , whichindicated that Beifeng 11 had a relatively high capability of nutrient absorption. The distribution of N andP across rhizosphere was different. The soluble N in rhizosphere was higher than non - rhizosphere , but anegative trend was found for the soluble P. Total N and P in rhizosphere were same as non - rhizosphere.The capability of nutrient mobilization in rhizosphere of the two genotypes was different. The soluble Nand P in 0- 8 mm of rhizosphere for Beifeng 11 were higher than Hai 9731, which might be related to thedifference of pH in rhizosphere. Beifeng 11 had higher pH in rhizosphere.
参考文献/References:
1 Costa C. , Dwy er L. M. , Dwy er M. , et al. A sampling methodfor measurement of large root systems with scanner- based imageanalysis[ J] . Agron. J. , 2000, 92:621 - 627.
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备注/Memo
基金项目:中国科学院知识创新项目(KZCX3- SW - NA - 04) 作者简介:金 剑(1974 -), 男, 助研, 在读博士, 主要从事作物生理生态研究