GREEN BIOMASS YIELD IN SUNFLOWER AS A FUNCTION OF STOCKING DENSITY

• DOI: https://doi.org/10.22533/at.ed.973512507013

• Palavras-chave: height, leaf:stem ratio,, matter weight, estimation model.

• Keywords: height, leaf:stem ratio,, matter weight, estimation model.

• Abstract:

  Sunflower has forage potential. The objective of this study was to determine in sunflower: the effect of PD on 1) the days to occurrence of phenological stages, plant height dynamics, green biomass and dry biomass production: 2) the dynamics of leaf:stem ratio and c) if plant height can be an appropriate estimator of biomass. The study was conducted in Montecillo Mex. ( 19 ° 29' N, 98° 53'0 and 2,250m altitude) of temperate climate (Cw) and clay loam soil Planting of sunflower cultivar "Victoria Mejorado" was carried out on May 20, 2022, with 100-100-00 of The treatments were three stocking densities (PD): 2.5plants m-2 (50*80 cm): 5 plants m-2(25*80cm) and 7.5 plants m-2 (33*40 cm). The experimental unit was 4 x3.2 m .  The experimental design was randomized blocks with four replications. The results indicate that the days to occurrence at phenological stages were not affected by stocking density. In contrast, the dynamics of height, the production of both green and dry biomass and the leaf:stem ratio were significantly changed by stocking density. Plant height may be an appropriate estimator of biomass production in sunflower.