Effect of Planting Density and Topdressing Nitrogen on Photosynthetic Rate and Chlorophyll Fluorescence and Yield of Wheat under Apricot-Wheat Intercropping
In this study,a special experiment was designed to test the effects of nitrogen fertilizer application rate and planting density on the photosynthesis characteristics and yield of wheat in apricotwheat intercropping.Using Xindong 20 as material,the experiment was carried out in a split-plot design with 4 nitrogen fertilizer application rates being in the main plot and 3 seeding density representing in the subplot.The 4nitrogen fertilizer application rates were arranged as no topdressing(CK),topdressing urea...