1Key Laboratory of Eco-Environment-Related Polymer Materials, Ministry of Education of China, Key Laboratory of Gansu Polymer Materials, College of Chemistry and Chemical Engineering, Northwest Normal University, 730070 Lanzhou, China.
Key Laboratory of Eco-Environment-Related Polymer Materials, Ministry of Education of China, Key Laboratory of Gansu Polymer Materials, College of Chemistry and Chemical Engineering, Northwest Normal University, 730070 Lanzhou, China.
2 Institute of Grassland Science, China Agricultural University, 100193 Beijing, China.
A 5 year field experiment was conducted to investigate the influence of different yearly climatic features and row spacing on seed yield and seed yield components during the 2008–2012 growing seasons in semi-arid soils in northwest China. Rows pacing treatments were 30, 60, 90, and 120 cm. Seed yield and some seed yield components were determined for all treatments. The year affected seed yield components markedly, but row spacing except for the quantity of seeds per pod. The interaction of year and row spacing have a significant impact on racemes per square meter and seed yield (
Alfalfa, Climatic features, Row spacing, Seed yield, Yield components
