| 遮阴对淀粉型甘薯生长发育及生理特性的影响 |
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| 引用本文： | 李韦柳,唐秀桦,韦民政,熊军,许娟,闫海锋.遮阴对淀粉型甘薯生长发育及生理特性的影响[J].热带作物学报,2017(2):258-263. |
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| 作者姓名： | 李韦柳 唐秀桦 韦民政 熊军 许娟 闫海锋 |
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| 作者单位： | 1. 广西农业科学院经济作物研究所,广西南宁,530007;2. 广西农业科学院生物技术研究所,广西南宁,530007 |
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| 基金项目： | 广西科学研究与技术开发计划项目(桂科AB16380046)，广西科学研究与技术开发计划项目(桂科AB1638085)，广西农业科学院院市合作研究项目(桂农科2016HZ028)，广西农业科学院基本科研业务费资助项目(2015YT64)，广西农业科学院发展基金资助项目(2015JM08)，崇左市科学研究与技术开发计划项目(崇科攻1329030) |
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| 摘 要： | 为探究淀粉型甘薯对光照强度的响应,采用人工遮阴的方法,研究不同遮阴程度0(CK),30%,70%]对甘薯地上部性状、产量、淀粉含量及生理特性的影响。结果表明,随遮阴程度的加重,甘薯叶片变大,节间距加大,叶柄和茎蔓伸长,茎粗变细,产量和淀粉产出率减少;叶片的叶绿素含量增加,叶绿素a/b值降低,SOD活性减小,POD活性、CAT活性、MDA含量和脯氨酸含量增加;与自然光照相比,轻度遮阴(遮阴30%)对淀粉型甘薯桂经薯2号生长发育影响较小,而重度遮阴(遮阴70%)造成弱光胁迫,地上部徒长,组织抗性降低,物质积累不足,影响了甘薯的产量和品质形成。因此,在间套种种植模式中,采用合理的田间配置才能实现高产高效。
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| 关 键 词： | 淀粉型甘薯 遮阴 产量 品质 生理特性 |
Effects of Shading on Growth,Development and Physiological Characteristics of Starchy Sweet Potato |
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| LI Weiliu,TANG Xiuhua,WEI Minzheng,XIONG Jun,XU Juan,YAN Haifeng.Effects of Shading on Growth,Development and Physiological Characteristics of Starchy Sweet Potato[J].Chinese Journal of Tropical Crops,2017(2):258-263. |
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| Authors: | LI Weiliu TANG Xiuhua WEI Minzheng XIONG Jun XU Juan YAN Haifeng |
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| Abstract: | Artificial shading treatments were adopted to study the effects of yield,starch content,above-groundtraitsand physiology characteristics under three shade conditions (0,30％,70％) to investigate the response of starchy sweet potato to different light intensity.The results showed that,the leaf length,leaf width,petiole,distance between leaves and vine increased,but the stem diameter and the yield of fresh root,dry root and starch decreased with the increase of the degree of shade.In addition,the chlorophyll content,peroxidation (POD) activity,catalase (CAT) activity,MDA and proline content also increased while superoxide dismutase (SOD) activity and chlorophyll a/b ratio decreased in the leaves.As compared with CK,the starchy sweet potato variety "Guijingshu2" still grew well under 30％ shading but was greatly affected by 70％ shading on many negative effects such as aboveground partsovergrowth,stress resistance weakened,dry matter accumulation deficiency and both yield and quality reductions by weak light stress.Therefore,the way to realize high-yielding and high-efficient cropping patterns in intercropping was using reasonable field arrangement. |
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| Keywords: | starchy sweet potato shading yield quality physiological characteristics |
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