| 张振明,余新晓,聂立水,焦健.干旱胁迫下CoCl2对紫花苜蓿幼苗生长影响初探[J].干旱地区农业研究,2005,(4):89~93 |
| 干旱胁迫下CoCl2对紫花苜蓿幼苗生长影响初探 |
| Preliminary studies of CoCl2 treatment on seedling growth of alfalfa under drought stress |
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| DOI：10.7606/j.issn.1000-7601.2005.04.18 |
| 中文关键词: 干旱胁迫 紫花苜蓿 幼苗生长 CoCl2溶液 |
| 英文关键词:drought stress alfalfa seedling growth CoCl2 |
| 基金项目:国家重大基础研究项目948(2003-4-13)资助 |
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| 中文摘要: |
| 通过不同浓度的CoCl2溶液浸种,研究在干旱胁迫下促进紫花苜蓿幼苗生长的最佳浓度。试验结果表明:在干旱胁迫下CoCl2处理的紫花苜蓿幼苗,以0.00025～0.1mmol/L处理的幼苗在株高、分枝数、根系长度、叶面积、地上部分鲜重、地下部分鲜重、地上部分干重、地下部分干重都有所增加,浓度为0.005mmol/L时各指标基本表现为最优。研究表明,较低浓度的CoCl2具有保护幼苗的作用,较高浓度时则表现为一定的伤害作用。紫花苜蓿株高(y)与叶面积(x1)、分枝数(x2)、地下部分鲜重(x3)、地上部分干重(x4)、根系长度(x5)、地上部分鲜重(x6)、地下部分干重(x7)之间的多元线性回归方程为:y=2.9153-0.4377x1+0.1227x2-4.9510x3-3.0736x4+226.4584x5+350.9114x6+342.4854x7。 |
| 英文摘要: |
| The seedlings of alfalfa were treated with CoCl2 to determine its optimal concentration to improve the growth of alfalfa under drought stress condition. The results showed that when the concentration was 0.000250.1 mmol/L, the plant height, number of branches, root length, leaf area, fresh weight of above-ground part, fresh weight of under-ground part, dry weight of above-ground part and dry weight of under-ground part were all increased to some degree, and most of the parameters were optimal at the concentration 0.005 mmol/L. It was proved that low concentration of CoCl2 was beneficial to the growth of alfalfa seedlings, but high concentration resulted in some injury effects. The relationship between plant height (y) and leaf area (x1), number of branches(x2), fresh weight of under-ground part(x3), dry weight of above-ground part(x4), root length(x5), fresh weight of above-ground part(x6), dry weight of under-ground part(x7) could be described by the multivariate linear regression equation: y=2.9153-0.4377x1+0.1227x2-4.9510x3-3.0736x4+226.4584x5+350.9114x6+342.4854x7. |
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