不同施肥量和种植密度对桂糖32号甘蔗蔗糖分和产量的影响

Yield and sucrose content of sugar cane Guitang32 influenced by fertilizer application rates and planting densities

为了明确桂糖32号最优高产栽培模式,本试验采用裂区设计,探索不同施肥量、种植密度对桂糖32号的甘蔗蔗糖分和产量的影响。结果表明,施肥量对桂糖32号蔗糖分影响较小,种植密度对桂糖32号蔗糖分影响较大,中高密度处理下的蔗糖分最高。肥料和密度的互作效应对蔗糖分影响较大,中肥中高密度处理下的蔗糖分最高。不同施肥量处理对桂糖32号产量影响显著,不同密度处理对产量影响不显著。肥料和密度的互作效应对桂糖32号产量影响显著,高肥中高密度处理下产量最高,肥料和密度的互作效应对桂糖32号经济效益影响明显,中肥低密度处理下经济效益最高。桂糖32号的高产高效栽培模式是:中肥(N:241.5 kg/hm^2,P_2O_5:270.0kg/hm^2,K_2O:135.0 kg/hm^2)低密度(1 hm^275 000芽)处理。

To explore the optimal cultivation pattern of sugarcane Guitang32, experiments with two-factor split block design were carried out to analyze the changes of sucrose content and yields at different fertilization levels and planting den-sities. The fertilization levels barely influenced the sucrose content which however was significantly affected by planting den-sities. Medium-high planting density presented the higher sucrose content. The interaction between fertilizer and densities showed a great effect on the sucrose content, which was higher in medium-high density treatments. Unlike planting density, the fertilization levels exhibited great effects on Guitang 32 yield. The sugarcane yield was the highest under high fertiliza-tion and medium planting density. High-yielding cultivation of Guitang32 was suggested to apply the medium fertilization of N 241-5 kg/hm^2, P2O5 270-0 kg/hm^2, K2 O 135-0 kg/hm^2 and the low planting density of 75 000 buds per hectare.