Potential Use of Tropical Grass for Deferment in Semi-Arid Region

• 作者: Ana Clara R. Cavalcante Elayne Cristina G. Vasconcelos Henrique A. Souza Jucivania F. Araújo Marcos Cláudio P. Rogerio Maria do Socorro Carneiro Rafael G. Tonucci
• 来源期刊: 美国植物学期刊(英文)
• 学科: 医学
• 关键词: Enriched CAATINGA CRUDE Protein DIGESTIBILITY PASTURE Quality Guineagrass PANICUM MAXIMUM cv. Massai
• 年，卷（期）: 2014,（7）
• 页码范围: 907-914
• 页数: 8页
• 分类号: R73

摘要

Management evaluation of Panicum maximum cv. massai (Massai guineagrass) under deferment contributes as a strategic reserve of forage in the Brazilian semi-arid region. The objective of this study was to evaluate biomass production and nutritive value of massai guineagrass in an area of thinned caatinga vegetation in two deferment periods (60 and 90 days after plot-leveling cut) and four use periods (30, 60, 90 and 120 days after the end of the rain season), in a random blocks design arranged in a split-plot (2 × 4), with three replications. Extending the deferment period of massai guineagrass promoted elevation of the biomass components, but compromised the pasture quality due to increasing stem biomass. The massai guineagrass deferred 30 days after raining season started and should use 90 days after raining season ended to ensure a forage supply of appropriate nutritional value. The increase in relative air humidity and the occurrence of rainfall after water restriction stimulate regrowth, resulting in improved nutritional value of the grass.