桂糖30号高产高糖配套栽培研究

对桂糖30号进行3个种植期、5种不同种植密度和3种不同施肥水平的配套栽培技术研究。结果表明:桂糖30号新植蔗早春植(2月份种)和中春植(3月份种)产量都比晚春植(4月份种)极显著增产,而宿根蔗早春植和中春植都比晚春植产量减产。种植密度在90 000~135 000芽/hm2的各处理之间产量差异不显著,但均显著高于低密度(75 000芽/hm2)的产量。在中肥水平(N525-P900-K450)下产量最高,施肥偏高或偏低产量都有下降的趋势。总的来说,桂糖30号于2月中旬到3月中旬种植,种植密度在90 000~120 000芽/hm2,新植蔗公顷适宜施肥量为速效N:450~550 kg,P2O5:700~900 kg,K2O:350~450 kg;宿根蔗公顷适宜施肥量为速效N:550~650 kg,P2O5:900~1 200 kg,K2O:450~600 kg,其蔗茎产量、蔗糖糖分及蔗糖产量最高。

Matched Cultivation for High Yield andSugar Content of Guitang 30

Three experiments of planting time, five experiments of density and three experiments of fertilizing level were conducted to research the matched cultivation measure with high yield and sugar of Gui Tang 30. The result showed that: There was a very significant increase in yield planted in February and March over in April; There was a significant increase in yield in a density of 90 000-135 000 sprouts/hm2 compared with the density of 75 000; Yield in moderate fertility level showed the highest, which was in a downside on high or lower fertility level. In general, cane yield, sucrose content and sucrose yield showed the highest planted in February and March with a density of 90 000-120 000 sprouts/hm2 and fertility level of N: 450-550 kg/hm2, P2O5 : 700-900 kg/hm2, K2O: 350-450 kg/hm2 in planting and fertility level of N: 550-650 kg/hm2, P2O5: 900-1 200 kg/hm2, K2O: 450-600 kg/hm2 on ratoon.