连作对玄参产量和根际土壤肥力及酶活性的影响  

Effect of Continuous Monoculture of Scrophularia ningpoensis on Yield,Rhizophere Soil Fertility and Enzyme Activities

作　　者：宋旭红[1] 谭均[1] 潘媛[1] 张雪[1] 潘红梅 李隆云[1] 

机构地区：[1]重庆市中药研究院/重庆市中药良种选育与评价工程技术研究中心/重庆市中药资源学重点实验室/中国中医科学院中药资源中心重庆分中心,重庆460005

出　　处：《中药材》2017年第6期1243-1248,共6页Journal of Chinese Medicinal Materials

基　　金：国家"十二五"科技支撑计划项目(2011BAI13B02-2);重庆市基础与前沿研究计划项目(cstc2013jcyA10126);重庆市基本科研业务计划项目(2015cstc-jbky-01903);重庆市"科技平台与基地建设"项目资助(cstc2014ptyjd10001)

摘　　要：目的:研究连作对玄参产量、根际土壤肥力及土壤酶活性的影响。方法:采用单因素随机区组试验设计方法。结果:连作对玄参病情指数、烂根率、药材及子芽产量有显著影响,连作年限越长影响越严重;连作可降低玄参根际土多酚氧化酶和酸性磷酸酶活性,对过氧化氢酶、蔗糖酶、脲酶、酸性蛋白酶和纤维素酶的活性没有显著影响;连作也没有对玄参根际土的全氮、全磷、全钾、碱解氮、速效磷、速效钾、pH值和有机质有显著影响。结论:连作会严重影响玄参的生长,造成死苗、烂根等,但是没有影响到玄参根际土的营养平衡,多酚氧化酶和酸性磷酸酶可能是影响玄参产生连作障碍的关键性酶,连作对其他土壤酶活性影响不显著。Objective：To study the effect of continuous monoculture of Scrophularia ningpoensiss on yield and the rhizophere soil fertility and enzyme activities.Methods：Using single factor randomized block design to analyze.Results：The disease index of Scrophularia ningpoensis,the rate of rot,the yield of tuberous root and bud has been affected significantly by continuous monoculture.With the long time continuous monoculture,the influences were more serious.Activities of polyphenol oxidase and acid phosphatase were decreased in rhizosphere soil under continuous monoculture.However,enzyme activities of catalase,sucrase,urease,acid protease and cellulose were not affected significantly.Meanwhile,the main nutrition （total N,P and K,alkali-hydrolyzable N,available P and available K）,pH and organic matter contents were not affected significantly yet.Conclusion：The results indicat that continuous monoculture of Scrophularia ningpoensis led to serious effect on the production and the rate of rot.But the balance of nutrition in rhizosphere soil is not yet affected.The polyphenol oxidase and acid phosphatase may be the critical enzymes in rhizosphere soil of Scrophularia ningpoensis,the effects of continuous monoculture on other soil enzyme activities are not significant.

关 键 词：玄参 连作障碍 产量 根际土壤养分 土壤酶活性 

分 类 号：R282.2[医药卫生—中药学]