种植密度及施氮方法对‘吉杂383’产量的影响

Effects of Planting Density and Nitrogen Application Methods on the Yield of’Jiza383’

本试验以早熟矮秆机收高粱新品种‘吉杂383’为材料,在大田试验条件下进行‘吉杂383’高产栽培技术研究。试验设置不同种植密度(12,13,14,15,16万株/hm^(2))、不同施肥方式(底肥加氮肥,缓释长效复合肥),以期筛选‘吉杂383’最适种植密度及最佳施肥方式。结果表明:‘吉杂383’的产量,随着密度的增加呈先上升后下降趋势。底肥加氮肥施肥方式下,在一定范围内,产量随着氮肥的增加而增加;缓释长效复合肥方式下,产量随着缓释长效复合肥的增加呈先上升后下降趋势。本试验中,‘吉杂383’最适种植密度为15万株/hm^(2),最佳施肥方式为复合肥+氮肥20 kg/666.7 m^(2)和缓释长效复合肥40 kg/666.7 m^(2)。

This experiment was co nducted to study the high yield cultivation technology of early maturing and short mechanized sorghum cultivar’Jiza383’under field test conditions.The experiment set different planting densities(120000,130000,140000,150000,160000 plants/hm^(2))and different fertilization methods(base fertilizer plus nitrogen fertilizer,slow release long-term compound fertilizer),in order to screen the optimal planting density and fertilization method of’Jiza383’.The results showed that the yield of’Jiza383’increased first and then decreased with the increase of density.In a certain range,the yield increased with the increase of nitrogen fertilizer.With the increase of sustained release long-acting compound fertilizer,the yield increased first and then decreased.In this experiment,the optimal planting density of’Jiza383’was 150000 plants/hm^(2),and the optimal fertilization method was compound fertilizer+nitrogen fertilizer 20 kg/666.7 m^(2)and slow-release long-acting compound fertilizer 40 kg/666.7 m^(2).