草业学报2017，Vol.26Issue(11)：35-46,12.DOI:10.11686/cyxb2017091
高寒区农茬口对当归田杂草群落特征的影响
Effects of crop stubble on weed community characteristics in Angelica sinensis fields in an alpine cold region
摘要
Abstract
Weed competition is the main factor limiting Angelica sinensis production in cold alpine areas.Combining field investigation with statistical modelling,the weed community dynamics in cultivated fields of the medicinal plant A.sinensis were studied,and compared with those of potato and rape crops.The work was conducted in Zhuoni county of Gannan Prefecture.The aim was to investigate the effect of crop residue characteristics on weed invasion and population change,to provide a scientific basis for defining agricultural residue management practices suitable for cultivation of medical plants,and for development of weed control protocols.The results showed that 15 weed species from 9 families and 15 genera were important.The dominant weed species were Malva sinensis,Senecio vulgaris,Sonchus oleraceus,Stellaria media,Cirsium setosum and Stachys sieboldi.The species,density,diversity and biomass of the weeds all varied with the residue properties and season.Of the two,the seasonal fluctuation was stronger.The diversity of the weed population diminished with time from planting,resulting in stronger competitive impact of the weeds on the crop through a highly similar usage of resources.The weed species M.sinensis and S.vulgaris were especially competitive and established with spring re-greening and spread during development of the Angelica.This pattern was especially prominent in both second-year Angelica crops and potato residues.However,the total weed biomass was the least in rape crop residue,resulting in weak competitive effect against the medicinal.To summarise,the rape residue is the most suitable for Angelica cultivation but it is also pivotal to control the more competitive weeds.关键词
高寒区/农茬口/当归田/杂草/群落特征Key words
cold alpine region/crop residues/Angelica sinensis field/weed/community characteristics引用本文复制引用
梁伟,郭凤霞,陈垣,白刚,袁洪超,金彦博..高寒区农茬口对当归田杂草群落特征的影响[J].草业学报,2017,26(11):35-46,12.基金项目
国家自然科学地区基金(31360317,31560175),国家中医药管理局项目(ZYBZH-Y-GS-11)和甘肃农业大学教学研究项目资助. （31360317,31560175）
