不同补播量和施肥量对退化草地牧草营养品质和产量的影响  

Effects of Reseeding Rates and Fertilization Levels on Nutritional Quality and Yield of Forage in a Degraded Grassland

作　　者：郭楠 刘建 王云玲 高明[1,2] 敖特根白音 姜塽[1] 关曾根 袁辉 孙国通 高立杰 GUO Nan;LIU Jian;WANG Yunling;GAO Ming;Aotegenbaiyin;JIANG Shuang;GUAN Zenggen;YUAN Hui;SUN Guotong;GAO Lijie(College of Animal Science and Technology,Hebei Agricultural University,Baoding 071000,China;Hebei Technology Innovation Center of Forage Resource Development and Efficient Utilization,Baoding 071000,China;Gushi Pasture in Fengning Manchu Autonomous County,Chengde 067000,China;Cangzhou Bohai New Area Huanghua City Agriculture and Rural Development Bureau,Cangzhou 061000,China)

机构地区：[1]河北农业大学动物科技学院,河北保定071000 [2]河北省饲草资源开发与绿色高效利用技术创新中心,河北保定071000 [3]丰宁满族自治县农业农村局孤石牧场,河北承德067000 [4]沧州渤海新区黄骅市农业农村发展局,河北沧州061000

出　　处：《中国草地学报》2025年第2期70-79,共10页Chinese Journal of Grassland

基　　金：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);河北省现代农业产业技术体系建设专项资金(HBCT2023160202)。

摘　　要：采用完全随机设计,解析不同牧草种类(老芒麦、扁穗冰草、垂穗披碱草和紫花苜蓿)、补播量(0、12.54、16.72和20.90 kg/hm^(2))和施肥量(0、53.73、107.46和161.49 kg/hm^(2)干牛粪)对退化草地牧草营养品质和产量的影响,旨在明确退化草地牧草高产优产的最适管理方式。结果表明:不同管理方式显著改变了牧草干物质、粗蛋白、中性洗涤纤维、酸性洗涤纤维、有机物、粗脂肪和总能(P<0.05)。退化草地补播豆科植物紫花苜蓿的牧草干草产量及各营养物质产量均显著高于补播禾本科牧草(P<0.05)。随着补播量和施肥量的增加,牧草的干草产量以及各营养物质产量均有显著提高(P<0.05)。退化草地补播紫花苜蓿(补播量20.90 kg/hm^(2)),且施53.73 kg/hm^(2)干牛粪时,地上混合牧草的综合营养价值最高。In order to identify the most appropriate management practice in degraded grasslands,a completely randomized design was used to determine effects of different forage species(Elymus sibiricus,Agropyron cristatum,Elymus nutans,and Medicago sativa),reseeding rates(0,12.54,16.72 and 20.90 kg/hm^(2))and fertilization rates(0,53.73,107.46 and 161.49 kg/hm^(2)dry cow dung)on forage nutritional quality and yield.The results showed that different management methods significantly changed dry matter,crude protein,neutral detergent fiber,acid detergent fiber,organic matter,crude fat,and gross energy in a degraded grassland(P<0.05).The hay yield and nutritional quality of forage were significantly higher after M.sativa(a legume)reseeding compared to Poaceae species reseeding(P<0.05)in degraded grassland.The hay yield and nutritional quality of forage were improved significantly with the increasing of reseeding rates and fertilization levels(P<0.05).In conclusion,the comprehensive nutritional value in the degraded grassland was the highest when reseeding with M.sativa at 20.90 kg/hm^(2)and fertilized with dry cow dung at 53.73 kg/hm^(2).

关 键 词：补播 施肥 退化草地 牧草产量 营养品质 

分 类 号：S812[农业科学—草业科学]