Comparison of Experimental Methods to Assess the Competitive Ability of Weed Species  

作　　者：Leandro Galon Germani Concenco Gismael Francisco Perin Alexandre Ferreira da Silva Cesar Tiago Forte Felipe de Adelio David Lauri Lourenco Radüz André Luiz Radunz André Andres Siumar Pedro Tironi Samara Emerim Concenco 

机构地区：[1]Plant Science Department, Federal University of the Southern Border, Erechim, Brazil [2]Weed Science, Embrapa Western Agriculture, Dourados, Brazil [3]Embrapa Maize and Sorghum, Sete Lagoas, Brazil [4]Weed Science, Embrapa Temperate Agriculture, Pelotas, Brazil [5]Plant Science Department, Federal University of the Southern Border, Chapecó, Brazil [6]Federal Institute of Santa Catarina at Santa Rosa do Su-SC, Santa Rosa do Sul, Brazil

出　　处：《American Journal of Plant Sciences》2015年第13期2185-2196,共12页美国植物学期刊（英文）

摘　　要：Competition between crops and weeds interfere on growth and development with harm to one or both, in different ways. To quantify these differences in competition, additive and replacement series study methods are most often used, each with different characteristics and goals. Therefore, we aimed with this work to study inter-specific competition between plants of soybean and corn against the weeds Bidens pilosa (beggartick) and Digitaria insularis (sourgrass), by two experimental methods of study: additive and replacement series (substitutive) experiments. Initial tests were performed prior to the installation of replacement series experiments to describe the intra-specific competition features for all species. For additive experiments these are unnecessary. To compare the methods of study, there were two sets of trials (an additive and a substitutive) installed under greenhouse, during the growing season 2013/14. Variables analyzed were leaf area and dry weight of shoots of crops and weeds, at 50 days after emergence. The results were analyzed according to the methods used, these being compared. It was found that the additive method supplied results most prone to be applied in the field, while the replacement series (substitutive) method was more appropriate for studies that aimed to provide detailed scientific information regarding the proportions of plants and coefficients describing the behavior of the species community.Competition between crops and weeds interfere on growth and development with harm to one or both, in different ways. To quantify these differences in competition, additive and replacement series study methods are most often used, each with different characteristics and goals. Therefore, we aimed with this work to study inter-specific competition between plants of soybean and corn against the weeds Bidens pilosa (beggartick) and Digitaria insularis (sourgrass), by two experimental methods of study: additive and replacement series (substitutive) experiments. Initial tests were performed prior to the installation of replacement series experiments to describe the intra-specific competition features for all species. For additive experiments these are unnecessary. To compare the methods of study, there were two sets of trials (an additive and a substitutive) installed under greenhouse, during the growing season 2013/14. Variables analyzed were leaf area and dry weight of shoots of crops and weeds, at 50 days after emergence. The results were analyzed according to the methods used, these being compared. It was found that the additive method supplied results most prone to be applied in the field, while the replacement series (substitutive) method was more appropriate for studies that aimed to provide detailed scientific information regarding the proportions of plants and coefficients describing the behavior of the species community.

关 键 词：INTERFERENCE Zea mays Glycine max WEEDS 

分 类 号：R73[医药卫生—肿瘤]