LIU Ying,ZHANG Meng-chen,YANG Chun-yan.Root Traits Spatial Distribution of Different Yield Level Summer Soybean in the South of Hebei Province[J].Soybean Science,2010,29(01):46-49.[doi:10.11861/j.issn.1000-9841.2010.01.0046]
冀南地区不同产量类型夏大豆根系空间分布变化
- Title:
- Root Traits Spatial Distribution of Different Yield Level Summer Soybean in the South of Hebei Province
- 文章编号:
- 1000-9841（2010）01-0046-04
- Keywords:
- Summer soybean; Yield type; Root trait
- 分类号:
- S565.1
- 文献标志码:
- A
- 摘要:
- 以在冀中南地区夏播表现相对高产和低产的共15个大豆品种为材料，分别自出苗后18、30、45和65 d，测定大田不同土层根系形态和生理指标，探讨大豆产量与根系性状之间的关系。结果表明：随生育进程，不同产量类型大豆根系在土层中的动态分布不同，在生长中后期，相对低产品种的根鲜重、根长、根表面积趋向于集中在浅层，而相对高产品种的根系性状在深层比例增加，同时相对高产品种的根系活力在较深土层内亦显著高于相对低产品种。深层根系性状及相对值表现出与产量较高的相关性，特别是10~20 cm土层内各根系性状的相对值与产量的相关性均达极显著。高产品种根系性状表现的空间分布特点可能是其在旺盛生长过程中抗御表层土壤养分匮乏的风险，从而保持根系较长功能期，最终获得高产的重要原因之一。
- Abstract:
- For probing into the relation between seed yield and root trait in soybean，fifteen summer soybean varieties with relative higher and lower yields in mid-south of Hebei province were used for researching on spatio-temporal root traits in field.At 18，30，45，65 days after seeding，the root morphological and physiological traits were obtained with root-drill.Results showed that during middle-later growth time，the root fresh weight，root total length and root areas of relative low yield varieties centralized in surface soil layer，but being more even in different soil layer in that with relative high yield.The root reduce activity of relative high yield varieties were higher evidently than that of relative low yield varieties.The root traits and their relative values in deep soil layer had higher relativity with yield，and especially in 10~20 cm soil layer all root traits relative values showed significant difference at the 0.01 probability level between two yield types.The spatial distribution variation of root traits in high yield verities could resist venture of soil nutrition short during their vigorous growth time and kept longer functional period of root，possibly being one of the important reasons of taking the high grain yield.
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备注/Memo
基金项目：河北省自然科学基金资助项目(C2008000721)。