Effect of Irrigation, Harvest Interval, and Nitrogen on the Yield and Nutrient Composition of Napiergrass (Pennisetum purpureum) 1

摘要: Studies were conducted in a subhumid area of Puerto Rico to investigate the main effect and interrelations harvest interval, irrigation, N fertilization on yield nutrient composition napiergrass (Penniseturn purpureum). Harvest interval exerted dry matter forage. Nitrogen irrigation also had highly significant effects. Irrigation interacted significantly with influence forage yield. The increase as result longer was nearly 92% greater irrigated than nonirrigated plots. produced protein No other management treatment appreciably influenced yields. Significant negative correlations obtained between both K for frequently harvested, Both nutrients at lower concentration periods that high