Shrestha Bhuwan, Karki Uma, Chaudhary Santoshi, Tiwari Anand, Karki Lila B
College of Agriculture, Environment and Nutrition Sciences, Tuskegee University, Tuskegee, AL 36088, USA.
Department of Animal Science, Texas A&M University, College Station, TX 77843, USA.
Animals (Basel). 2023 Dec 23;14(1):68. doi: 10.3390/ani14010068.
The influence of different supplement types on the performance and nutrient dynamics of goats stocked in woodlands is not known. The objective of this study was to evaluate the effect of supplement type on the performance and the concentration of fecal nutrients of nursing does and the performance of kids raised in woodlands. One group of goats (SG, 9 does; 18 kids) was allowed supplemental grazing in adjacent silvopasture plots for 3-4 h daily and another group (SF, 8 does; 15 kids) was supplemented with corn (0.5% of metabolic weight) and ad libitum hay. Vegetation samples were collected and analyzed for productivity and quality (crude protein, CP; acid detergent fiber, ADF; neutral detergent fiber, NDF). The quality of the hay (N, ADF, NDF) and fecal samples (N, P, Ca) was analyzed. The animals' live weight, FAMACHA score, and body condition score were collected. The browsing height for does consuming woodland vegetation was measured. Data were analyzed using the GLM procedure, Mixed procedure, and MEANS procedure in SAS 9.4. SG does showed better FAMACHA scores vs. SF does ( < 0.05). Fecal N and ADF were greater ( < 0.0001) in SG does vs. SF does. The findings showed a better performance and greater concentration of fecal nutrients in SG does vs. SF does, suggesting grazing quality pastures is a better option than using feedstuffs to supplement nursing does in woodland.
不同补充类型对林地放牧山羊生产性能和养分动态的影响尚不清楚。本研究的目的是评估补充类型对哺乳母羊生产性能、粪便养分浓度以及林地饲养羔羊生产性能的影响。一组山羊（SG组，9只母羊；18只羔羊）每天在相邻的林牧地块进行3 - 4小时的补充放牧，另一组（SF组，8只母羊；15只羔羊）补充玉米（占代谢体重的0.5%）和自由采食的干草。采集植被样本并分析其生产力和质量（粗蛋白、CP；酸性洗涤纤维、ADF；中性洗涤纤维、NDF）。分析干草（N、ADF、NDF）和粪便样本（N、P、Ca）的质量。记录动物的体重、FAMACHA评分和体况评分。测量采食林地植被的母羊的啃食高度。使用SAS 9.4中的GLM过程、混合过程和均值过程对数据进行分析。与SF组母羊相比，SG组母羊的FAMACHA评分更好（<0.05）。SG组母羊的粪便N和ADF含量高于SF组母羊（<0.0001）。研究结果表明，与SF组母羊相比，SG组母羊生产性能更好，粪便养分浓度更高，这表明在林地放牧优质牧场比使用饲料补充哺乳母羊是更好的选择。
