Restriction of irrigation in the production of pasture biomass Pennisetum sp

Abstract

The research was conducted at the site Garrapata, Parroquia Santa Rita, Manabi province; during the dry season of 2015The study consisted in evaluating the water restriction in the production of purple king grass (Pennisetum sp) under aspersion irrigation method. A design randomized complete, consisting of three treatments and six repetitions blocks were used. The treatments were applied three sheets of water replenishment 80% ETc 100% ETc, 120% ETc calculated from daily records of evaporation obtained from pan evaporation type A and affected by the coefficients Kp (coefficient tub, method FAO 33,1980). The variables evaluated were: plant height at 15 and 30 days equalization cut grass, plant height at harvest (m), green forage yield per plot and hectare (kg) and dry matter (%). The results show the irrigation treatment sheet of 120% ETc (T3), responded favorably in plant height at harvest (2.08 m), Yield (53000 kgha-1); the blade irrigation treatment 100% ETc (T2) obtained higher dry matter content (19.86%). Purple grass king grass watered with irrigation depth to 120% of ETc, is a modality that improves productive and profitable crop yield and could be applied in the area.