Information regarding the relationship between laboratory seed vigor testing and seedling field emergence is very important to estimate seed performance after sowing and help producers adopt the best procedures to improve stand establishment. The objective of the present study was to relate accelerated aging (AA) test results to soybean [Glycine max (L.) Merrill] seedling field emergence results based on data obtained over three agricultural years. The following evaluations were made: seed water content, standard germination, accelerated aging, electrical conductivity, and seedling field emergence. There was a close association between planting environmental conditions, seed physiological quality and seedling field emergence. The most accurate predictions were obtained for AA values ≥ 90%, when field emergence was higher than 80% (r 2 = 0.90). Based on the results it was concluded that the AA test provided an accurate estimate of field emergence of soybean seedlings. However, as seedbed environmental conditions became less favorable, the ability of the AA test to estimate field performance significantly decreased. Key words: Glycine max (L.) Merrill, seeds, vigor ENVELHECIMENTO ACELERADO E EMERGÊNCIA DE PLÂNTULAS DE SOJA EM CAMPORESUMO: Informações sobre a relação entre resultados de testes de vigor conduzidos em laboratório e da emergência de plântulas em campo são fundamentais para a tomada de decisões pelos produtores de sementes. O presente trabalho teve por objetivo verificar a associação entre os resultados do teste de envelhecimento acelerado e a emergência de plântulas de soja [Glycine max (L.) Merrill] em campo, em diferentes safras agrícolas e épocas de semeadura. Assim, foram efetuadas as seguintes avaliações: determinação do grau de umidade das sementes; testes de germinação, de envelhecimento acelerado e de condutividade elétrica, bem como emergência de plântulas em campo. A estimativa mais precisa do desempenho das plântulas em campo foi verificada numa faixa de valores de envelhecimento acelerado ≥ 90%, estimando emergência em campo superior a 80% (r 2 = 0,90). O teste de envelhecimento acelerado permitiu avaliar a emergência de plântulas de soja em campo. No entanto, à medida que as condições ambientais do local de semeadura foram desviandose das mais adequadas, a eficiência decresceu. Palavras-chave: Glycine Max (L.) Merrill, sementes, vigor
Preplant fungicide baths were tested on yam (Dioscorea rotundata Poir cv. Habanero) seed pieces (114-g sections) from sound tubers to determine their effect on emergence and yield of yams. Field plots were free of damaging populations of parasitic nematodes and had not been previously planted with yams. Yam seed pieces treated with captan or captan plus thiabendazole or captan plus benomyl increased field emergence (95, 96 and 91%, respectively) over that of nontreated controls (52%). Early emergence (5 weeks after planting) was greater for captan plus thiabendazole (24%) than for captan plus benomyl (1%), captan alone (2%), or the nontreated control (1%). Final stand counts (9 weeks after planting) were not statistically different among the fungicide treatments (91-96%). These counts were highly correlated with total tuber yield (r = 0.84**), total number of harvested tubers (r = 0.77**), and mean tuber weight (r = 0.74**). Plants from nontreated seed pieces produced a higher number of tubers per plant (1.64) compared with those from fungicide treated seed-pieces (1.16-1.20). Yield losses in nontreated seed pieces (48%) were related to losses in mean tuber weight (37%) and in total number of tubers (20%) per area when compared to the treated seed pieces. Greatest per plant and total yield and greatest tuber weight were found for the captan plus thiabendazole treatment, compared with captan alone or captan plus benomyl. Early and greater emergence of yam seed pieces appear to be important determinants of yield and tuber size in Habanero yams. In this experiment, even with good seed pieces and in a well-prepared seedbed, yam emergence and yield were diminished by one-half without fungicide treatment.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
customersupport@researchsolutions.com
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.