Optimizing Row Spacing and Seeding Rate for Yield and Quality of Alfalfa in Saline-Alkali Soils
文献类型： 外文期刊
作者： Shi, Jiaqi 1 ; Xie, Nan 1 ; Zhang, Lifeng 1 ; Pan, Xuan 1 ; Wang, Yanling 3 ; Liu, Zhongkuan 1 ; Liu, Zhenyu 1 ; Zhi, Jianfei 1 ; Qin, Wenli 1 ; Feng, Wei 1 ; Sun, Guotong 4 ; Yu, Hexing 4 ;
作者机构： 1.Hebei Acad Agr & Forestry Sci, Inst Agr Recourses & Environm, Shijiazhuang 050051, Peoples R China
2.Hebei Key Lab Soil Fertilizat & Agr Green Dev, Shijiazhuang 050051, Peoples R China
3.Nanjing Univ Informat Sci & Technol, Sch Ecol & Appl Meteorol, Nanjing 210044, Peoples R China
4.Huanghua Agr & Rural Dev Bur, Cangzhou 061199, Peoples R China
关键词： alfalfa; row spacing and seeding rate configuration; planting density; chlorophyll fluorescence; nutritional quality; redundancy analysis
期刊名称：AGRONOMY-BASEL （ 影响因子：3.4； 五年影响因子：3.8 ）
ISSN：
年卷期： 2025 年 15 卷 8 期
页码：
收录情况： SCI
摘要：
To elucidate the photosynthetic physiological mechanisms influencing alfalfa (Medicago sativa L.) yield and quality under varying planting densities, the cultivar 'Zhongmu No.1' was used as experimental material. The effects of different row spacing (R1, R2, R3) and seeding rate (S1, S2, S3, S4, S5) combinations on chlorophyll content (ChlM), nitrogen flavonol index (NFI), chlorophyll fluorescence parameters, forage quality, and hay yield were systematically analyzed. Results showed that alfalfa under R1S3 treatment achieved peak values for ChIM, NFI, EE, and hay yield, whereas R1S4 treatment yielded the highest Fv/Fm and CP content. Redundancy analysis further indicated that yield was most strongly associated with ChlM, NFI, Y (II), and qP. Y (II), and qP significantly influenced alfalfa forage quality, exerting negative effects on ADF and NDF, while demonstrating positive effects on CP and EE. In conclusion, narrow row spacing (15 cm) with moderate seeding rates (22.5-30 kg
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