Produção do inhame em solo adubado com fontes e doses de matéria orgânica

Abstract

RESUMOObjetivou-se neste trabalho avaliar o comportamento do inhame, cultivar Da Costa, adubado com fontes e doses de matéria orgânica. O delineamento experimental foi em blocos casualizados distribuídos em esquema fatorial 6 x 2, correspondendo a seis doses (0, 6, 12, 18, 24 e 30 t ha -1 ) e duas fontes de matéria orgânica (esterco bovino e caprino), em três repetições. O comprimento de túberas aumentou de forma linear com valor máximo de 27,5 cm na dose de 30 t ha -1 de esterco caprino e o esterco bovino proporcionou túberas com comprimento médio de 23,64 cm. O diâmetro foi de 9,1 e 9,3 cm nas doses de 20 e 21,6 t ha -1 de esterco caprino e bovino, respectivamente. A máxima massa média de túberas de 1,4 kg foi obtida com a dose 17,4 t ha -1 de esterco caprino e, em função do fornecimento das doses de esterco bovino obteve-se o valor médio de 1,11 kg. A dose de 20,9 t ha -1 de esterco caprino proporcionou a máxima produtividade comercial de túberas de 14 t ha -1 e produtividade média de 10,1 t ha -1 com o uso de esterco bovino. O esterco caprino foi superior ao bovino e a dose em torno de 20 t ha -1 de ambos os estercos promove os maiores valores nas características avaliadas. Palavras-chave: Dioscorea cayennensis, adubação orgânica, produtividade de túberasProduction of yam in a soil fertilized with different sources and rates of organic matter ABSTRACT The objective of this study was to evaluate the behavior of yam, variety Da Costa, fertilized with different sources and rates of organic matter. The experimental design was a randomized complete blocks distributed in a factorial 2 x 6, corresponding to six rates (0, 6, 12, 18, 24 and 30 t ha -1 ) and two sources of organic matter (cattle and goat manure), with three replications. The length of tubers increased linearly with maximum value of 27.5 cm at a rate of 30 t ha -1 of goat manure and the bovine manure provided tubers with mean length of 23.64 cm. The diameter was of 9.1 and 9.3 cm in rates of 20 and 21.6 t ha -1 of goat and bovine manure, respectively. The maximum mean mass of 1.4 kg was obtained with the rate 17.4 t ha -1 of goat manure and in function of rates of bovine manure the mean value obtained was 1.11 kg. A rate of 20.9 t ha -1 of goat manure provided the maximum commercial productivity of tubers of 14 t ha -1 , while mean productivity of 10.1 t ha -1 was obtaines with the use of bovine manure. The goat manure is better than bovine manure and the rate around of 20 t ha -1 of both the manures promoted the highest values of the evaluated characteristics.

Nitrogen and potassium synergism influences the yield and quality of Dioscorea cayennensis

“…The values of average tuber mass found in this study were adequate for marketing, as they are within the ideal range (1.5 to 3.0 kg) defined by Santos (1996), expressing the importance of these nutrients in improving the accumulation of mass by yam (Dantas et al, 2013). Therefore, combining N and K also favors biomass accumulation since optimum potassium levels can increase the nitrogen use efficiency involved in photosynthetic processes, which are based on the diffusion and fixation of CO 2 , generating photoassimilates that are used by plants (Xu et al, 2020), such as tubers.…”

“…In this study, maximum marketable yields were reduced when the N and K 2 O doses exceeded 132 and 118 kg ha -1 , respectively. Dantas et al (2013) verified a reduction in the marketable yield of yam with N doses above 154 kg ha -1 , as well as Oliveira et al (2013), when they supplied K 2 O in amounts greater than 189 kg ha -1 . The recommendation of doses depends on several factors, such as the level of yield, nutrient content in the soil, type of soil, climate, irrigation, fertilizer efficiency, among others.…”

“…The N contents as a function of the use of N and K 2 O are within the range from 30 to 48 g kg -1 , considered normal for tuber vegetables (Prezotti and Martins, 2013). Similarly, Dantas et al (2013) and Santos et al (2015) also obtained contents within the standard, 34.5 and 36.5 g kg -1 , respectively, evaluating N doses in the same species and edaphoclimatic conditions. The higher leaf N content at the maximum dose of N may indicate that the plant did not reach saturation with respect to this nutrient, due to a possible constant absorption influenced by soil moisture.…”

“…These doses are lower than those estimated in the present study (131.8 kg ha -1 ) required to obtain the maximum marketable yield of 17.7 t ha -1 , which can be explained by the low organic matter content initially found in the soil (8.79 g dm -3 ). Dantas et al (2013) emphasize that soils with low organic matter content can allow lower N availability to crops, resulting in one of the main limitations to agricultural yield.…”

Obtenção de farinha de inhame para elaboração de barra de cereal como suplemento alimentar e funcional

“…Entre as propriedades nutricionais, o inhame é superior a batata inglesa e a mandioca, fácil digestibilidade dos grãos de amido, apresenta baixo conteúdo de lipídios (0,17%), alto nível de ácidos graxos insaturados, elevado teor de proteínas (3,89%) e teores de minerais (2,29%) (Ca, P e Fe),além de vitaminas do complexo B (tiamina, riboflavina, niacina), aminoácidos essenciais, provitamina A e D, vitamina C (RAMOS FILHO; RAMOS; HIANE, 1997;PEIXOTO NETO et al,2000;FONTES, et al, 2009;DANTAS et al, 2013).…”