Effect of silicon on the morphology of shoots and roots of alfalfa (Medicago sativa)
Effect of silicon on the morphology of shoots and roots of alfalfa (Medicago sativa)
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DOI：
10.1071/ea05117
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发表时间：
2006-01-01
影响因子：
--
通讯作者：
Wang, S. M.
中科院分区：
文献类型：
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作者：
Guo, Z. G.;Liu, H. X.;Wang, S. M.
采用盆栽试验研究了缺硅土壤上施硅对紫花苜蓿地上部和根系形态的影响。施硅量为0、0.025、0.05、0.10、0.20、0.30 g/kg，每个处理重复6次。结果表明，随着土壤硅浓度的增加，玉米根和地上部硅含量显著增加（P < 0.05），且根的硅含量大于地上部。与对照相比，硅处理的植株在生殖期的叶面积、株高、牧草产量和单株芽数均有所增加。施硅还增加了根系体积、次生根数和根系生物量。施硅对根系的影响大于地上部。当施硅时，地上部与根干重的比值低于1.62，而不施硅时为1.91。总体而言，克服有效硅缺乏导致地上部和根系生长显着增加。
Asilicon (Si)-deficient top soil was used in a pot experiment to investigate the effect of Si application on the shoot and root morphology of alfalfa ( Medicago sativa L.). Silicon was applied to the alfalfa plants at 6 different rates (0, 0.025, 0.05, 0.10, 0.20, 0.30 g/kg), and each treatment was replicated 6 times. This study indicated that the Si content of roots and shoots increased significantly (P < 0.05) with increasing Si concentration in the soil, and that the Si content of roots was greater than that of shoots. Plants treated with Si had increased leaf area, height, forage yield and shoots per plant during the reproductive period in comparison with controls. The application of Si also increased root volume, the number of secondary roots and root biomass. The effects of Si application were greater on roots than on shoots. The ratio of shoot to root dry weight was below 1.62 when Si was applied to plants and 1.91 without Si application. Overall, overcoming available Si deficiency resulted in a significant increase in shoot and root growth.