中国草地学报2026，Vol.48Issue(1)：37-48,12.DOI:10.16742/j.zgcdxb.20250122
不同比例燕麦保护性播种对豆禾混播草地生产性能和根系构型的影响
Effects of Different Seeding Ratios of Oat as a Nurse Crop on Productivity and Root Architecture in Legume-Grass Mixtures
摘要
Abstract
Legume-grass mixtures are an ideal combination for functional regulation in sown pastures.However,the early establishment often faces challenges such as low yield and intense weed competition.As an effective agronomy strategy for weed suppression,nurse cropping is commonly used in the establishment year to enhance sown pasture quality and stand stability.In this research,a two-year field study(2023-2024)was conducted in Jiaozhou,Shandong,China,to investigate the effects of oats(Avena sativa)as a nurse crop at dif-ferent seeding ratios(0%,15%,30%,45%,and 60%in 2023;0%,10%,20%,30%,and 40%in 2024)on the grassland productivity and root growth of an alfalfa-tall fescue(Medicago sativa-Festuca arundinacea)mixture,under two row configurations(mixed within the same row vs.sown in separate alternating rows).The results showed that in 2023,the treatment with oats sown in alternating rows at a 15%ratio achieved a total dry hay yield of 16.57 t/hm2,which was 22.30%higher compared with the control(0%oats).The crude protein content reached 21.79%,representing an increase of approximately 13.79%compared with the control.In 2024,under the treatment with oats sown in alternating rows at a 20%ratio,the annual total dry hay yield reached 18.40 t/ha,representing a 26.41%increase compared to the control.The crude protein content rose to 23.36%,which was approximately 20.60%higher compared with the control.The fractal dimension,num-ber of root tips,and number of root links of alfalfa roots increased by 8.40%,5.70%,and 53.70%,respec-tively,compared with the control.For tall fescue,these root metics increased by 3.80%,17.80%,and 49.50%,respectively.In summary,using oats as a nurse crop at seeding ratios of 15%to 20%in alternating rows effectively enhanced forage yield,feed quality,and root architecture development of the legume-grass mixture.This research provides a theoretical basis for optimizing sown pasture establishment.关键词
保护性播种/混播草地/牧草产量/营养价值/根系构型Key words
Nurse cropping/Legume-grass mixture/Forage yield/Nutritive value/Root architecture分类
农业科技引用本文复制引用
赵晓雨,石佳瑜,徐玉芳,杨国锋,杨超,林克剑,孙娟,苗福泓..不同比例燕麦保护性播种对豆禾混播草地生产性能和根系构型的影响[J].中国草地学报,2026,48(1):37-48,12.基金项目
国家重点研发计划项目(2022YFD1300800) （2022YFD1300800）
国家牧草产业技术体系(CARS-34) （CARS-34）
山东省牧草产业技术体系(SDAIT-23) （SDAIT-23）
山东省重点研发计划项目(2025CXPT149) （2025CXPT149）
