Open AccessYield and nutritional value of biomass sorghum (BRS 716) managed in different row spacing and maturity at harvest in the semiarid region of Brazil
Author(s) -
Ícaro Daniel Alves dos Santos Souza,
Vicente Ribeiro Rocha Júnior,
Flávio Pinto Monção,
R. A. da C. Parrella,
Matheus Wilson Silva Cordeiro,
Cínara da Cunha Siqueira Carvalho,
João Paulo Sampaio Rigueira,
Ignácio Aspiazú,
Fredson Vieira e Silva,
Nelson de Abreu Delvaux Júnior
Publication year - 2021
Publication title -
semina. ciências agrárias
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.268
H-Index - 25
eISSN - 1679-0359
pISSN - 1676-546X
DOI - 10.5433/1679-0359.2021v42n6p3463
Subject(s) - dry matter , sorghum , randomized block design , sowing , zoology , biomass (ecology) , neutral detergent fiber , agronomy , nutrient , sweet sorghum , silage , maturity (psychological) , biology , mathematics , ecology , psychology , developmental psychology
The objective was to evaluate the structural, yield and nutritional characteristics of biomass sorghum BRS 716 managed in different row planting spacing and harvest age in a semiarid region of Brazil. Three row spacing (45, 70 and 90 cm; plots) and four maturity at harvest (70, 100, 130 and 160 days; subplots) were evaluated following a randomized block design in a 3 x 4 split plot arrangement, with eight blocks. The useful area was 3 x 15 m. Variation in soil fertility in the area was the blocking factor. There was interaction between row spacing and maturity at harvest (P < 0.05) on plant height (P = 0.01), dry matter yield (DMY; P < 0.01) and proportion of senescent material (P = 0.01). The DMY observed at the age of 160 days and spacing of 90 cm was 41.40% higher than the DMY at the same age and in spacings of 45 and 70 cm (mean of 21.45 t/ha). As the maturity at harvest increased, there was a reduction in the crude protein content (P < 0.01), potential degradability (P < 0.01) and effective degradability (P < 0.01) of dry matter, and the content of non-fiber carbohydrates (P < 0.01), total digestible nutrients (P < 0.01) and the readily soluble fraction (P < 0.01) of the dry matter increased. Considering the yield and nutritional characteristics of biomass sorghum BRS 716 managed in the semiarid region for silage production, the row spacing of 90 cm and the maturity at harvest of 160 days after planting are recommended.