Role of income diversification in protecting natural forests: evidence from rural households in forest margins of Sri Lanka |
| |
Authors: | Prabodh Illukpitiya John F Yanagida |
| |
Institution: | (1) Dale Bumpers Small Farms Research Center, United States Department of Agriculture, Agricultural Research Service, 6883 South State Hwy. 23, Booneville, AR 72927, USA;(2) Biological and Agricultural Engineering, University of Arkansas, Fayetteville, AR 72701, USA;(3) Appalachian Farming Systems Research Center, United States Department of Agriculture, Agricultural Research Service, 1224 Airport Rd, Beaver, WV 25813, USA;(4) Forest Science, Oregon State University, Corvallis, OR 97331, USA;(5) Ralph E. Martin Department of Chemical Engineering, University of Arkansas, Fayetteville, AR 72701, USA |
| |
Abstract: | Ranchers need alternative livestock feeds when herbaceous forages become limiting in summer. Our objectives were to determine:
(1) leaf and stem biomass components, (2) nutritive value in vitro dry matter digestibility (IVDMD), total nonstructural
carbohydrate (TNC), N, and N digestibility] of leaves for animal browse, (3) concentration of the secondary metabolites robinin
and mimosine, and (4) in vitro leaf and bark toxicity for black locust (Robinia pseudoacacia L.) and mimosa (Albizia julibrissin Durz.), respectively, pollarded at 50 cm in Arkansas, USA. Black locust exceeded mimosa for every yield component (leaf mass
tree−1, leaves shoot−1, shoots tree−1, shoot mass tree−1, stem basal area, and biomass tree−1) except mass leaf−1. Projected yields were 1,900 and 1,600 kg leaves ha−1 for black locust and mimosa, respectively, assuming a population of 12,300 trees ha−1. Mimosa leaves had greater IVDMD, TNC, and N digestibility than black locust. Mimosa leaves exceeded the nutritional N requirements
of growing cattle (Bos taurus L.) and goats (Capra hircus L.), but protein supplementation would be needed for growing goats grazing black locust leaves. Tissue concentrations of
secondary metabolites robinin and mimosine were below detectable limits in black locust and mimosa, respectively. The extract
of black locust bark, but not leaves, was toxic to bioassayed African green monkey (Cercopithecus aethiops L.) cells. Either black locust or mimosa could provide moderate quantities of high quality, rotationally grazed forage for
goats during summer months when herbaceous forage may in short supply. |
| |
Keywords: | Black locust Crude protein In vitro dry matter digestibility Mimosa Mimosine Nitrogen Pollard Robinin |
本文献已被 SpringerLink 等数据库收录! |
|