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为了给吉林省中西部地区青贮玉米高产栽培提供技术支撑,试验研究了种植密度、磷酸二铵、尿素和硫酸钾4因素及其不同水平配比组合对青贮玉米生物产量的影响。结果表明:4因素对青贮玉米生物产量影响的大小顺序依次为密度>硫酸钾>磷酸二铵>尿素;密度和硫酸钾不同水平对青贮玉米生物产量的影响达到极显著水平(P<0.01),且随着密度和硫酸钾施用量的增加青贮玉米生物产量明显提高;磷酸二铵不同水平对青贮玉米生物产量的影响达到显著水平(P<0.05),较低的施用量即可达到增产效果;尿素不同水平对产量的影响差异不显著(P>0.05);密度、磷酸二铵、尿素和硫酸钾不同水平的配比组合对青贮玉米生物产量的影响达到极显著水平(P<0.01),应用种植密度7.0万株/hm2、硫酸二铵150kg/hm2、尿素150kg/hm2和硫酸钾150kg/hm2配比组合,可获得高产。
In order to provide technical support for the high-yield cultivation of silage maize in central and western Jilin Province, the effects of planting density, DAP, urea and potassium sulfate and their combinations at different levels on the biomasses of silage corn were studied. The results showed that the effects of four factors on the yield of silage maize were as follows: density> potassium sulfate> diammonium phosphate> urea; the effects of density and different levels of potassium sulfate on the biomasses of silage corn reached extremely significant levels (P <0.01) And the biomass of silage maize increased significantly with the increase of density and potassium sulphate application. The different levels of diammonium phosphate had significant effects on the biomasses of silage maize (P <0.05), and the yield could be increased with lower application rate. (P> 0.05). The effects of different combinations of density, diammonium phosphate, urea and potassium sulfate on the yield of silage maize reached the extremely significant level (P <0.01) Planting density of 70,000 / hm2, diammonium sulfate 150kg / hm2, urea 150kg / hm2 and potassium sulfate 150kg / hm2 ratio combinations, access to high yield.