Abstract
ABSTRACT From the perspective of the use of sweet potato branches for animal feed, there is a lack of information on the influence of this action on hay quality. Therefore, the objective was to study the association of sweet potato yield attributes with chemical-bromatological characteristics of hay. Ten sweet potato clones were evaluated, conducted in randomized blocks with five replications. Green and dry mass yield, dry mass content, leaf and stem ratio, total and commercial root yield, and chemical and bromatological characteristics of hay from the branches were determined. Phenotypic correlation and trial analysis between characteristics were estimated. Selection for the highest yield of roots and commercial roots may provide increased hay of crude protein, neutral detergent fiber and acid and total soluble sugars. However, selection for the highest root yield has a negative effect on the starch content of hay and deserves special attention from the breeder.
Highlights
Sob perspectiva do uso das ramas de batata-doce para a alimentação animal, há carência de informações da influência desta ação sobre a qualidade do feno
Sweet potato (Ipomoea batatas) may be an alternative because, despite being traditionally cultivated for the production of roots for human consumption, its branches have satisfactory characteristics for animal feed, because they are rich in sugars, vitamins and have high crude protein content, total digestive nutrients and digestibility (Pedrosa et al, 2015)
Phenotypic correlations were of low magnitude and not significant
Summary
Sob perspectiva do uso das ramas de batata-doce para a alimentação animal, há carência de informações da influência desta ação sobre a qualidade do feno. The search for supplies for grazing animals in the dry season is constant, as there is usually a great shortage of pastures, causing animal mortality due to lack of food (Viana et al, 2011) This fact determines the demand by the producer of food alternatives in order to supply the low forage availability for ruminant animals establishing a nutritive efficiency for their growth and development (Ferreira et al, 2014). Sweet potato is a tuberous vegetable with wide adaptation to different environments, characterized by its rusticity, low production cost and mainly cultivated by small producers (Andrade Junior et al, 2016) Due to their high protein content, sweet potato branches can be fed to various animal species such as pigs and cattle (Veiga et al, 2009; Ly et al, 2010). The haymaking technique is based on the principle of conservation of the forage nutritive value through rapid dehydration, in the face of paralysis of the respiratory activity of the plant
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