03856nab a2200325 i 4500003000900000005001700009008004100026040001800067072000800085100002400093100002000117100003200137100003000169100002400199100003000223245009800253500006700351520130400418520140701722650001103129650001503140650002203155650001803177650001703195650002103212773019003233856008003423942000803503999001903511BR-BrBNA20260612150023.0260612b2023    bl.qr|pooa||| 00| 0 eng |  aBR-BrBNAbeng  aH60  aBrunetto, Leonardo   aGalon, Leandro   aCavaletti, Daniel Cristian   aMunareto, Janete Denardi   aCastamann, Alfredo   aPerin, Gismael Francisco   aCompetitive response and level of economic damage of quinoa in the presence of alexandergrass  a

Publicação online; 30 ref.; 3 illus.; Summaries (En, Pt)  a


ABSTRACT: The study of interference and the economic damage level (EDL) of weeds in crops allows more rational management measures to be adopted. Given this, it was the aim of this study to determine the competitive ability and EDL of quinoa genotypes in  the  presence  of  alexandergrass.  Treatments  consisted  of  three  quinoa  genotypes  (Q  1303,  Q  1331,  and  Q  1324),  which  competed with 12 alexandergrass densities: 0, 16, 36, 40, 44, 52, 60, 84, 280, 532, and 1,036; 0, 8, 28, 32, 48, 52, 60, 72, 84, 820, and 988; and, 0, 8, 36, 44, 48, 60, 68, 80, 84, 120, 756, and 848 plants m-2, respectively. Alexandergrass plants were evaluated for plant density (PD), ground cover (GC), leaf area (LA), and aerial dry mass (ADM). In quinoa, grain yield, control cost, selling price, and control efficiency were determined. The quinoa genotype Q 1331 shows greater competitive ability when compared to Q 1303 and Q 1324. EDL values varied from 1.81 to 11.74 plants m-2 for genotype Q 1331, which was more competitive in the presence of alexandergrass. The lowest EDL values ranged from 1.21 to 8.12 plants m-2, for the genotypes Q 1303 and Q 1324, which have the lowest competitiveness with the competitor..  


Key words:      Chenopodium quinoa; plant interference; Urochloa plantaginea  a


RESUMO:   O  estudo  da  interferência  e  do  nível  de  dano  econômico  (NDE)  de  plantas  daninhas  em  culturas  permite  adotar  medidas de manejo mais racional. Diante disso, objetivou-se com este estudo determinar a habilidade competitiva e o NDE de genótipos de quinoa na presença de papuã. Os tratamentos foram compostos por três genótipos de quinoa (Q 1303, Q 1331 e Q 1324), os quais competiram com 12 densidades de papuã: 0, 16, 36, 40, 40, 44, 52, 60, 84, 280, 532 e 1036; 0, 8, 28, 32, 32, 48, 52, 60, 72, 84, 820 e 988; e 0, 8, 36, 44, 48, 60, 68, 80, 84, 120, 756 e 848 plantas m-2, respectivamente. Nas plantas de papuã foram avaliadas a densidade de plantas (DP), cobertura do solo (CS), área foliar (AF) e massa seca da parte aérea (MS). Na quinoa determinou-se a produtividade de grãos, custo de controle, preço de venda e eficiência de controle. O genótipo de quinoa Q 1331 apresenta maior habilidade competitiva ao ser comparado com o Q 1303 e Q 1324. Os valores de NDE variam de 1,81 a 11,74 plantas m-2 para o genótipo Q 1331, sendo esse mais competitivo na presença do papuã. Os menores valores de NDE variam de 1,21 a 8,12 plantas m-2, para os genótipos Q 1303 e Q 1324, os quais apresentam as menores competitividades com o competidor.  


Palavras-chave:      Chenopodium quinoa; interferência de plantas; Urochloa plantaginea  aQUINOA  aGENÓTIPO  aCOBERTURA DO SOLO  aÁREA FOLIAR  aERVA DANINHA  aDANO ECONÔMICO0 046569368366dRecife-PE Universidade Federal Rural de Pernambuco 2006o2026-2526tRevista Brasileira de Ciências Agrárias (Brazil)x1981-1160gv. 18(1) p. 1-10; (2023)wBR2026001565  uhttp://www.agraria.pro.br/ojs32/index.php/RBCA/article/view/v18i1a2543/1503  cANA  c348131d348131