不同土壤湿度对棉花苗期生长及生理机制的影响 |
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引用本文: | 张教海,别墅,王孝刚,夏松波. 不同土壤湿度对棉花苗期生长及生理机制的影响[J]. 湖北农业科学, 2016, 0(22): 5761-5763. DOI: 10.14088/j.cnki.issn0439-8114.2016.22.009 |
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作者姓名: | 张教海 别墅 王孝刚 夏松波 |
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作者单位: | 湖北省农业科学院经济作物研究所/长江中游棉花生物学与遗传育种重点实验室,武汉,430064 |
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基金项目: | 国家科技支撑计划项目(2014BAD11B0203),国家棉花产业技术体系项目(CAS-18-22),湖北省农业科技创新中心资助项目(2016-620-000-001-010) |
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摘 要: | 不同土壤湿度(15%、35%、55%、75%、95%、115%)对棉花(Gossypium hirsutum L.)苗期生长和若干生理指标的影响。试验结果表明,棉苗正常生长土壤适宜含水量为55%~75%,过多过少均不利于棉苗健壮生长。棉花苗期受水分胁迫,植株可溶性蛋白质含量、脯氨酸(Pro)含量增加;水分胁迫处理初期,超氧化物歧化酶(SOD)、过氧化物酶(POD)活性增强,随着胁迫时间的延长,抗氧化酶活性不断降低;植株真叶数、株高、茎粗以及干重和鲜重明显减少,根系干重和鲜重也同样降低。
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关 键 词: | 棉花(Gossypium hirsutum L.) 土壤湿度 苗期生长 生理机制 |
Influence of Different Soil Moisture on Growth and Physiology of Cotton Seedling |
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Abstract: | In this experiment six soil water contents of 15%,35%,55%,75%,95% and 115% were used to study the effect of soil moisture on the growth and physiology of cotton seedling.The result showed that the optimal soil moisture content is 55%~75%;Either too much or too little soil moisture would retard the growth of the seedling.During water stress,the height,stem diameter,dry and fresh weight of plant remarkably decreased;the soluble proteins and Pro of leaf increased.At the early stage of water stress,the activity of SOD and POD was enhanced,but decreased as the time extension of water stress. |
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Keywords: | cotton(Gossypium hirsutum L.) soil moisture seedling growth physiological mechanism |
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