草业学报2025，Vol.34Issue(4)：150-163,14.DOI:10.11686/cyxb2024174
施肥和补播对山地草甸牧草营养及瘤胃发酵的影响
Effects of different fertilization and reseeding rates on the nutrient content of forage in a mountain meadow and its rumen fermentation parameters
摘要
Abstract
The aim of this study was to investigate the effects of fertilization and seeding rates on the nutrient content and rumen fermentation parameters of mixed vegetation in a degraded mountain meadow.Combinations of Elymus sibiricus,Agropyron cristatum,Elymus nutans,and Medicago sativa were sown at four seeding rates(0,3.4,4.6,and 5.7 kg·ha-1)and grown with four different fertilization treatments(0,3.6,7.2,and 10.8 t·ha-1).The dry matter yields and nutrient contents of four different grassland seed mixtures(EEM:E.sibiricus+E.nutans+M.sativa;EAM:E.sibiricus+A.cristatum+M.sativa;AEM:A.cristatum+E.nutans+M.sativa;EAEM:E.sibiricus+A.cristatum+E.nutans+M.sativa)were measured and their rumen fermentation parameters were studied by in vitro fermentation.The main results were as follows:Compared with no fertilization,fertilization had significant effects on dry matter yield(DMY),neutral detergent fiber(NDF),acid detergent fiber(ADF)content,and the relative feed value(RFV)of each mixed sowing treatment(P＜0.05).Under the 4.6 kg·ha-1seeding rate,the DMY,NDF,and ADF contents and RFV value of EEM were significantly different from their corresponding values in the other seeding rate treatments(P＜0.05).The contents of ammonia nitrogen and propionate in rumen fluid of EEM,EAM,and AEM sown with a seeding rate of 4.6 kg·ha-1 were significantly different from their corresponding values in the other seeding rate treatments(P＜0.05).In a principal component analysis,EEM with a fertilization rate of 10.8 t·ha-1and a seeding rate of 5.7 kg·ha-1had the highest comprehensive score.A response surface analysis showed that AEM had the highest predicted yield,followed by EEM,and EEM had the highest comprehensive score.Based on yield and the comprehensive score,E.sibiricus+E.nutans+M.sativa with a fertilization rate of 10.8 t·ha-1and a seeding rate of 5.7 kg·ha-1was identified in this study as the best option for replanting degraded mountain meadows.关键词
施肥量/补播量/牧草品质/瘤胃发酵参数/主成分分析(PCA)/响应面分析(RSM)Key words
fertilizer application amount/sowing amount/forage quality/rumen fermentation parameters/principal component analysis(PCA)/response surface analysis(RSM)引用本文复制引用
郭楠,杜鹉辰,纪守坤,刘建,崔素倩,袁辉,韩旭,刘计双,高立杰..施肥和补播对山地草甸牧草营养及瘤胃发酵的影响[J].草业学报,2025,34(4):150-163,14.基金项目
河北省科学技术厅重点研发计划项目-坝上草畜耦合修复退化草地生态技术模式研究(22327508D)和河北省草业产业技术体系饲草资源开发创新团队项目(HBCT2023160202)资助. （22327508D）
