基于Meta分析中国老芒麦种子产量和产量组分对施肥的响应OA北大核心

The objective of this study was to investigate the fertilizer response of seed yield and seed yield components of Elymus sibiricus under different conditions,in order to provide theoretical guidelines for seed production of E.sibiricus,a native grass species in China.Published research conducted in China was analysed,with unfertilized E.sibiricus serving as the control.By analysing the data from relevant field experiments,the response of seed yield and yield components of E.sibiricus to fertilizer application was quantitatively investigated,along with the effect of stand age,row spacing and regional factors.The results showed that fertilization significantly increased the seed yield of E.sibiricus(P<0.001),and had a positive effect on its yield components.The most obvious effects were an overall yield increase from a single application of nitrogen fertilizer and from combined application of N,phosphorus and potassium fertilizers.The effect of fertilizer application on yield of E.sibiricus was better in stands planted for 3-4 years and on E.sibiricus planted with a row spacing of 30 cm,and fertilizer obviously prolonged the production life of E.sibiricus stands.With respect to different climatic and soil conditions,fertilizer application had a better effect on the seed yield of E.sibiricus in semi-humid areas with an average annual precipitation of 400-800 mm,in areas with an average annual temperature of-0.3 to 8 ℃,in areas with sandy loam soil,or where soil nutrient imbalances occur through year-round cultivation.