Studies on the grassland management in late-autumn and early-spring. 3; Effect of fertilizer application time in spring on growth, crude protein content and yield of grasses for soiling
1989
Seo, S. | Park, M.S. | Han, Y.C. | Lee, J.K. (Rural Development Administration, Suwon (Korea R.). Livestock Experiment Station)
This field experiment was carried out to determine the effects of fertilizer application time in spring on the growth, crude protein (CP) content and dry matter (DM) yield of grasses for soiling. Application times of fertilizer were March 10, 20, 30, April 9 and 19, and control (non-fertilized) plot was involved. All fertilized plots were also treated with single- and compound fertilizer. The first harvesting date for soiling was May 12, and the regrowth soiling yield was investigated on June 9, 1988. In all fertilized plots, the growth, DM yield, CP, CP yield and regrowth yield of grasses were significantly increased compared with control, and the best grass growth, DM yield, CP, CP yield and N recovery were observed on March 30 and April 9 among all fertilized plots. And there were not significant differences between single and compound fertilizer treatment in grass growth, DM yield and CP content. On march 30 and April 9 in this experiment, the accumulated temperature was 120 and 200deg C and the subsoil temperature at 10 cm depth was 8 and 10deg C. Considering the average meteorological condition in Suwon area, the optimum application time of spring fertilizer for soiling may be recommended from April 3 to April 10
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