甘蔗桂糖35号优化施肥技术

[目的]研究优良甘蔗新品种桂糖35号的施肥管理技术,优化施肥方案。[方法]采用四元二次正交旋转组合设计方法,研究下种量、氮肥、磷肥及钾肥4个因素对桂糖35号产量的影响,建立数学模型,优化施肥方案。[结果]各栽培因子对桂糖35号甘蔗产量的影响顺序是磷肥氮肥钾肥下种量;只要满足下种量103 462.50～105 540.00芽/hm2,施尿素652.65～801.30 kg/hm2,施磷肥1 461.83～1 523.70 kg/hm2,施钾肥453.23～477.60 kg/hm2,即可获得87.92 t/hm2以上的甘蔗产量。[结论]该研究可为桂糖35号在不同生态区域研究制定高效栽培管理方案提供理论参考依据。

The Optimizing of Fertilizer Practice for Sugarcane GT 35( GT 02-901 )

[Objective] The aim was to study the optimizing fertilization management technology of new sugarcane variety GT 35 and optimize the fertilizing schedule.[Method] Using quaternary quadratic regression rotational combination design,the effects of planting densities,nitrogen fertilizer,phosphate fertilizer and potassium fertilizer on the output of sugarcane GT 35 were studied,and the mathematical model was established,the fertilizing schedule was optimized.[Result] Each cultivation factor had the greatest effect on the yield of sugarcane GT 35 and followed the sequence of phosphate fertilizer> nitrogen fertilizer > potassium fertilizer > planting densities.When,planting densities is 103 462.50-105 540.00 buds/hm2,urea application rate is 652.65-801.30 kg/hm2,phosphate fertilizer application rate is 1 461.83-1 523.70 kg/hm2,potassium fertilizer application rate is 453.23-477.60 kg/hm2,under this optimal situations,the yield of sugarcane will up to 87.92 t/hm2.[Conclusion] This research will support efficient cultivation and management of programs and provide theoretical basis for GT 35 cultivated in the different ecological regions.