Crescimento de Sorgo Forrageiro cultivado sob diferentes doses de esterco e níveis de água.

Abstract

Northeastern semiarid must be explored with crops that produce maximum productive yield. Sorghum is characterized by playing an important role in the forage sector, as it is one of the most cultivated crops. The objective of this study was to evaluate the use of doses of goat manure and water slides in the growth and production of dried phytomass of forage sorghum. The experiment was carried out in greenhouse during the months of May and June of 2018, at the Federal University of Campina Grande, at the Agro-Food Science and Technology Center, Pombal Campus. The factorial scheme adopted was (4 x 2), with four doses of goat manure (0.0, 4.0, 8.0 and 12.0 t / ha-1) and two levels of water in the soil (40 and 80% of the field capacity, with four replicates, totaling 32 experimental units. Plastic pots with a capacity of 10 dm3 were used, where 10 sorghum seeds were sown in each pot. Five days after emergence, thinning of less vigorous plants was performed. Irrigations were performed based on drainage lysimetry. The experiment was conducted during 30 days after emergence, where the following variables were evaluated: plant height, leaf number, stem diameter, dry leaf biomass, dry shoot size, dry shoot biomass of forage sorghum plants. Increasing doses of goat manure provided higher growth increments and dry phytomass production, where 12 t / ha-1 rates ensured the highest yields.