在西部放牧系统中重新捕获和发现母羊价值1.pdf

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1、United States Department of AgricultureAgricultural Research ServiceUS Sheep Experiment Station,Dubois IDRecapturing and Discovering Ewe Value in Western Range SystemsDr.J.Bret TaylorUSDA,Agricultural Research ServiceRange Sheep Production Efficiency Research UnitU.S.Sheep Experiment Station,Dubois,

2、Idaho USAUnited States Department of AgricultureAgricultural Research ServiceUS Sheep Experiment Station,Dubois IDTraditional large-flock enterprises of the Upper Mountain West Multigenerational,beginning before the advent of the National Forest Reserve and National Forest System.Historically and cu

3、rrently the largest sheep operations in the US.Open range,herded systems.Operational model built on the combined use of deeded and public lands(Forest Service,Bureau of Land Mngt.)Because of size,possess the greatest genetic diversity for the most common sheep breeds.On average,have the most product

4、ive ewes.United States Department of AgricultureAgricultural Research ServiceUS Sheep Experiment Station,Dubois IDA Systems Shift Across the US,“sheep”farms are up.From 2000 to 2020,20%increase.Yet,the overall ewe inventory doesnt reflect an increase.Rather,recent inventories are mostly stagnant.In

5、short,many of these new“sheep farms”are small farms.What about the traditional large-flock enterprises?United States Department of AgricultureAgricultural Research ServiceUS Sheep Experiment Station,Dubois IDA shift away from large,range-based operations00.010.020.030.040.050.060.40.50.60.70.80.9119

6、7819821987199219972002200720122017Farms with 1000 hd/total farmsSheep in flocks 1000 hd/total countNASS survey yearSheep&lamb inventory ratioFarm inventory ratioUnited States Department of AgricultureAgricultural Research ServiceUS Sheep Experiment Station,Dubois IDWhy the shift away from the genera