耕作方式对植烟土壤酚酸类物质的影响
2021-08-06方宇邓小鹏张留臣封幸兵王皓李庆鹏周彬陈峰王津军张晗李卫陈小龙黄飞燕余磊童文杰刘佳妮
方宇 邓小鹏 张留臣 封幸兵 王皓 李庆鹏 周彬 陈峰 王津军 张晗 李卫 陈小龙 黄飞燕 余磊 童文杰 刘佳妮



摘要 [目的]明確不同耕作方式对植烟土壤酚酸类物质积累特征的影响,为缓解其自毒化感作用提供理论依据。[方法]以烤烟“K326”为研究材料,进行大田试验,以旋耕20 cm(RT20)为对照,利用高效液相色谱法(HPLC)检测旋耕20 cm(RT20)、翻耕30 cm(DT30)、深松30 cm(ST30)和深松40 cm(ST40)下酚酸类物质的种类和含量,并基于相关性分析和逐步回归模型探讨各酚酸类物质的积累特征及其影响。[结果]不同耕作方式下共检出6种酚酸,对羟基苯甲酸、香草酸、丁香酸、4-香豆酸、阿魏酸和酚酸总量在DT30处理下含量较低,较RT20分别低13.77%、68.87%、25.81%、19.83%、20.54%、27.09%,且香草酸达到显著差异(P<0.05);除肉桂酸外各酚酸类物质含量均随土层的加深逐渐降低,ST40下对羟基苯甲酸、香草酸、丁香酸、4-香豆酸、阿魏酸和酚酸总量较ST30分别低16.41%、8.39%、17.85%、18.57%、35.68%、26.18%;同在30 cm耕作土层中,除肉桂酸外各酚酸含量均表现为DT30 关键词 耕作方式;植烟土壤;酚酸类物质;积累特征;高相液相色谱法;影响 中图分类号 S-153 文献标识码 A 文章编号 0517-6611(2021)13-0080-06 doi:10.3969/j.issn.0517-6611.2021.13.020 开放科学(资源服务)标识码(OSID): Effects of Tillage Methods on Phenolic Acids in Tobacco Planting Soil FANG Yu1,DENG Xiao peng2,ZHANG Liu cheng3 et al (1.Yunnan Urban Agricultural Engineering & Technological Research Center, College of Agronomy, Kunming University, Kunming,Yunnan 650214;2.Yunnan Academy of Tobacco Agricultural Sciences, Kunming,Yunnan 650201;3.China National Tobacco Corporation Yunnan Company, Kunming,Yunnan 650011) Abstract [Objective]To clarify the effect of different tillage methods on the accumulation characteristics of phenolic acids in tobacco planting soil, and to provide a theoretical basis for alleviating its autotoxic allelopathy. [Method]Using flue cured tobacco “K326” as the research material, field experiment was conducted, rotary tillage 20 cm (RT20) was used as a control, high performance liquid chromatography (HPLC) was used to detect rotary tillage 20 cm (RT20) and tillage 30 cm (DT30), deep pine 30 cm (ST30) and deep pine 40 cm (ST40) types and contents of phenolic acids, and based on correlation analysis and stepwise regression model to explore the accumulation characteristics of phenolic acids and their effects. [Result]A total of 6 phenolic acids were detected under different tillage methods. The total amount of p hydroxybenzoic acid, vanillic acid, syringic acid, 4 coumaric acid,ferulic acid and phenolic acid were all lower in DT30 treatment. RT20 was 13.77%, 68.87%, 25.81%, 19.83%,20.54% and 27.09% lower, respectively, and vanillic acid reached a significant difference (P<0.05); except for cinnamic acid, the content of phenolic acids decreased gradually with the deepening of the soil layer, the total amount of para hydroxybenzoic acid, vanillic acid, syringic acid, 4 coumaric acid, ferulic acid and phenolic acid in ST40 were 16.41%, 8.39%, 17.85%, 18.57%, 35.68%, 26.18% lower than ST30 respectively.Except for cinnamic acid, the content of each phenolic acid in the 30 cm cultivated soil layer was DT30 Key words Tillage methods;Tobacco planting soil; Phenolic acids; Accumulation characteristics; High phase liquid chromatography;Effect 烟草是我国重要的经济作物之一,在全国各省均有种植,每年税收占全国总税收的1/10,是各级财政的重要组成部分[1]。玉溪是云南省清香型优质烤烟的代表产区,有“云烟之乡”美称,玉溪地处云贵高原西缘,地形复杂,山地面积占90.6%[2],决定了玉溪地区主要以山地烟田进行种植,且旋耕、翻耕是其主要的耕作方式。旋耕、翻耕使得土壤耕层浅耕性退化、水土流失、有机质含量降低、生物活性降低等问题突出,最终导致烟草的产量和质量下降,严重制约着烟草产业的健康发展。土壤酚酸类物质主要来源于植物根系分泌,被土壤和作物根系吸收后产生化感作用[3-4],其作用强度取决于其在土壤中的积累、降解以及相互之间的作用关系[5]。……
