Paspalum guenoarum seed yield components under different cutting schemes

Paspalum guenoarum Arech. ecótipo “Azulão” apresenta tolerância a geadas e estiagens e boa produção e distribuição de forragem ao longo do ano. O objetivo deste estudo foi avaliar o efeito de regimes de corte na produção e qualidade de sementes de Paspalum guenoarum ecótipo “Azulão”. O trabalho foi realizado na EEA-UFRGS, Eldorado do Sul. O Delineamento Experimental utilizado foi Blocos Completamente Casualizados, com quatro tratamentos e quatro repetições. As parcelas tinham 7,2 m² (3,6m x 2m) e plantas em linhas espaçadas 0,4m. As variáveis estudadas foram número total de perfilhos/planta, número de perfilhos vegetativos/planta e número de perfilhos florescidos/planta através de avaliações semanais não destrutivas. O número de racemos/inflorescência, número de sementes/inflorescência, número de sementes/racemo, peso de mil sementes, peso de sementes/inflorescência, rendimento de sementes/área, percentagem de germinação e produção de matéria seca foram obtidos através de amostragens destrutivas. Os dados foram submetidas à análise de variância, em caso de diferença significativa, as médias comparadas utilizando o teste de Tukey a 5% de significância. A análise de variância indicou efeito significativo dos regime de corte para todas as variáveis analisadas. Houve decréscimo no rendimento de sementes e atraso na floração quando foram realizados dois ou mais cortes. Três cortes reduziram drasticamente o florescimento e produção de sementes, sendo as sementes formadas em época desfavorável. Os componentes que mais influenciaram o rendimento de sementes foram o número de sementes por inflorescência e número de sementes por racemo. Os maiores rendimentos de sementes foram obtidos com os tratamentos zero cortes (850 kg/ha) e um corte (794 kg/ha) não diferindo estatisticamente entre si. O mesmo foi observado no rendimento de sementes puras viáveis, com 555 kg/ha para zero cortes e 505 kg/ha para um corte. A maior porcentagem de germinação foi obtida nos tratamentos zero (64 %) e um corte (60 %).Paspalum guenoarum Arech., Azulão ecotype, is frost and drought tolerant and has good forage production. The aim of this study was to evaluate different cutting schemes effects on seed quality and production. The experiment was carried out in the EEA/UFRGS (Federal University of Rio Grande do Sul), Eldorado do Sul. The experimental design was completely randomized blocks (4 treatments), with four replications. The plots area was 7,2 m² (3,6m x 2m). Also the following variables were evaluated: total number of tillers/plant, number of vegetative tillers/plant, number of reproductive tillers/plant by non destructive weekly samplings. The number of racemes/inflorescence, number of seeds/raceme, weight of 1000 seeds, weight of seed/inflorescence, seed/area yield, seed germination in laboratory and dry matter yield. Data were subjected to variance analysis and means were compared by Tukey test (5%) in case of significant difference. The variance analysis showed a significant effect of cutting schemes for all evaluated variables. There was decrease in seed production and flowering delay when two or three cuttings were permormed. When three cuttings were performed there was serious decrease in seed productions, and the seeds development occurred in unfavorable period. Seeds production was influenced by the number of racemes/inflorescence and number of seeds/raceme. Zero cutting and one cutting presented the higher seed yield, 850 kg/ha and 794 kg/ha respectively. The higher germination was 64% (without cutting) and 60% (one cutting)

Paspalum guenoarum seed yield components under different cutting schemes

Paspalum guenoarum Arech. ecótipo “Azulão” apresenta tolerância a geadas e estiagens e boa produção e distribuição de forragem ao longo do ano. O objetivo deste estudo foi avaliar o efeito de regimes de corte na produção e qualidade de sementes de Paspalum guenoarum ecótipo “Azulão”. O trabalho foi realizado na EEA-UFRGS, Eldorado do Sul. O Delineamento Experimental utilizado foi Blocos Completamente Casualizados, com quatro tratamentos e quatro repetições. As parcelas tinham 7,2 m² (3,6m x 2m) e plantas em linhas espaçadas 0,4m. As variáveis estudadas foram número total de perfilhos/planta, número de perfilhos vegetativos/planta e número de perfilhos florescidos/planta através de avaliações semanais não destrutivas. O número de racemos/inflorescência, número de sementes/inflorescência, número de sementes/racemo, peso de mil sementes, peso de sementes/inflorescência, rendimento de sementes/área, percentagem de germinação e produção de matéria seca foram obtidos através de amostragens destrutivas. Os dados foram submetidas à análise de variância, em caso de diferença significativa, as médias comparadas utilizando o teste de Tukey a 5% de significância. A análise de variância indicou efeito significativo dos regime de corte para todas as variáveis analisadas. Houve decréscimo no rendimento de sementes e atraso na floração quando foram realizados dois ou mais cortes. Três cortes reduziram drasticamente o florescimento e produção de sementes, sendo as sementes formadas em época desfavorável. Os componentes que mais influenciaram o rendimento de sementes foram o número de sementes por inflorescência e número de sementes por racemo. Os maiores rendimentos de sementes foram obtidos com os tratamentos zero cortes (850 kg/ha) e um corte (794 kg/ha) não diferindo estatisticamente entre si. O mesmo foi observado no rendimento de sementes puras viáveis, com 555 kg/ha para zero cortes e 505 kg/ha para um corte. A maior porcentagem de germinação foi obtida nos tratamentos zero (64 %) e um corte (60 %).Paspalum guenoarum Arech., Azulão ecotype, is frost and drought tolerant and has good forage production. The aim of this study was to evaluate different cutting schemes effects on seed quality and production. The experiment was carried out in the EEA/UFRGS (Federal University of Rio Grande do Sul), Eldorado do Sul. The experimental design was completely randomized blocks (4 treatments), with four replications. The plots area was 7,2 m² (3,6m x 2m). Also the following variables were evaluated: total number of tillers/plant, number of vegetative tillers/plant, number of reproductive tillers/plant by non destructive weekly samplings. The number of racemes/inflorescence, number of seeds/raceme, weight of 1000 seeds, weight of seed/inflorescence, seed/area yield, seed germination in laboratory and dry matter yield. Data were subjected to variance analysis and means were compared by Tukey test (5%) in case of significant difference. The variance analysis showed a significant effect of cutting schemes for all evaluated variables. There was decrease in seed production and flowering delay when two or three cuttings were permormed. When three cuttings were performed there was serious decrease in seed productions, and the seeds development occurred in unfavorable period. Seeds production was influenced by the number of racemes/inflorescence and number of seeds/raceme. Zero cutting and one cutting presented the higher seed yield, 850 kg/ha and 794 kg/ha respectively. The higher germination was 64% (without cutting) and 60% (one cutting)

Management of consecutive cuts in the production and quality of wintergreen paspalum seeds

The objective of this study was to evaluate the practice of consecutive cuts in the production and quality of Paspalum guenoarum seeds of the “Azulão” ecotype. The experimental design used was in completely randomized blocks with four replications. The treatment included three cuts in succession: zero cut, one cut, two cuts, and three cuts. The variables were: number of total tillers/plant; number of vegetative tillers/plant; number of reproductive tillers/plant; percentage of reproductive tillers; number of racemes/inflorescence; weight of thousand seeds; number of seeds/inflorescence; seed production; forage dry matter; water content of seeds; germination; first germination count; and germination speed index. The largest seed production was obtained with zero cut (850.3, first year and 719.4 kg/ha–1, second year) and one cut (794.4, first year and 627.3 kg/ha–1, second year) with no statistical difference between them. The largest germination percentage was seen with the application of zero (71.0%, first year and 79.3%, second year) and one cut (69.3%, first year and 75.0%, second year). There was a decrease in the production and quality of the seeds of the second cut, especially during the first year of evaluation. The total tillers, the percentage of tillers that went through the reproductive stage, and the number of reproductive tillers are the variables that are most highly correlated with seed production

Management of consecutive cuts in the production and quality of wintergreen paspalum seeds

The objective of this study was to evaluate the practice of consecutive cuts in the production and quality of Paspalum guenoarum seeds of the “Azulão” ecotype. The experimental design used was in completely randomized blocks with four replications. The treatment included three cuts in succession: zero cut, one cut, two cuts, and three cuts. The variables were: number of total tillers/plant; number of vegetative tillers/plant; number of reproductive tillers/plant; percentage of reproductive tillers; number of racemes/inflorescence; weight of thousand seeds; number of seeds/inflorescence; seed production; forage dry matter; water content of seeds; germination; first germination count; and germination speed index. The largest seed production was obtained with zero cut (850.3, first year and 719.4 kg/ha–1, second year) and one cut (794.4, first year and 627.3 kg/ha–1, second year) with no statistical difference between them. The largest germination percentage was seen with the application of zero (71.0%, first year and 79.3%, second year) and one cut (69.3%, first year and 75.0%, second year). There was a decrease in the production and quality of the seeds of the second cut, especially during the first year of evaluation. The total tillers, the percentage of tillers that went through the reproductive stage, and the number of reproductive tillers are the variables that are most highly correlated with seed production

Management of consecutive cuts in the production and quality of wintergreen paspalum seeds

ABSTRACT The objective of this study was to evaluate the practice of consecutive cuts in the production and quality of Paspalum guenoarum seeds of the "Azulão" ecotype. The experimental design used was in completely randomized blocks with four replications. The treatment included three cuts in succession: zero cut, one cut, two cuts, and three cuts. The variables were: number of total tillers/plant; number of vegetative tillers/plant; number of reproductive tillers/plant; percentage of reproductive tillers; number of racemes/inflorescence; weight of thousand seeds; number of seeds/inflorescence; seed production; forage dry matter; water content of seeds; germination; first germination count; and germination speed index. The largest seed production was obtained with zero cut (850.3, first year and 719.4 kg/ha-1, second year) and one cut (794.4, first year and 627.3 kg/ha-1, second year) with no statistical difference between them. The largest germination percentage was seen with the application of zero (71.0%, first year and 79.3%, second year) and one cut (69.3%, first year and 75.0%, second year). There was a decrease in the production and quality of the seeds of the second cut, especially during the first year of evaluation. The total tillers, the percentage of tillers that went through the reproductive stage, and the number of reproductive tillers are the variables that are most highly correlated with seed production