糖能兼用甘蔗新品种粤糖96-86适宜施肥水平和播种量研究

Studies on the planting density and the rates of fertilization for the new sugar-energy cane variety YT96-86

应用L9(34)正交设计,在湛江蔗区进行糖能兼用型甘蔗新品种粤糖96-86的不同施肥水平和不同播种量试验,结果表明:在每667 m2施用尿素50 kg、过磷酸钙200 kg、氯化钾40 kg及播种3 000段双芽苗的条件下栽培的粤糖96-86经济效益最佳,每667 m2工农业总产值达2 260.8元;当过磷酸钙用量从100 kg增加到150 kg以及播种量从2 700段增加到3 000段时,蔗茎产量有增加的趋势;每667 m2施用过磷酸钙150 kg的甘蔗蔗糖分含量为15.69%,比施用过磷酸钙200 kg和100 kg处理分别提高0.22%和0.29%,差异达显著和极显著;每667 m2施用氯化钾40 kg的甘蔗蔗糖分为15.79%,比施用氯化钾50 kg和60 kg处理分别提高0.38%和0.44%,差异均达极显著;此外,各施肥处理和不同播种量处理的含糖量处理间差异不显著。

Field experiment of L9（3^4） on different planting densities and the application rates of N, P, and K fertilizers for the new sugar-energy cane variety YT96-86 was conducted in Zhanjiang cane area, Guangdong provice. The results indicated that under the conditions of the experiment, the best compose was the No. 7（50 kg of urea, 200 kg of calcium superphosphate, 40 kg of potassium chloride and 3 000 two-budded setts per 1/15 hectare） for planting YT96-86, which could get the highest economical benefit, the total production value of industry and agriculture 2 260.8 yuan per 1/15 hectare. Both higher phosphorus fertilizer application（from 100 kg to 200 kg of calcium superphosphate per 1/15 hectare） and bigger planting density（from 2 700 to 3 300 two-budded setts per 1/15 hectare） resulted in higher cane yields. 150 kg of calcium superphosphate per 1/15 hectare, under which the average sugar content of YT96-86 was 15.69%, resulted in 0.22% and 0.29% higher than 200 kg of calcium superphosphate per 1/15 hectare and 100 kg of calcium superphosphate per 1/15 hectare respectively （the former reached significant level and the latter extremely significant one）. 40kg of potassium chloride per 1/15 hectare, under which the average sugar content of YT96-86 was 15.79%, resulted in 0.38% and 0.44% higher than 50 kg of potassium chloride per 1/15 hectare and 60 kg of potassium chloride per 1/15 hectare respectively （both the two reached extremely significant level）. No remarkable differences in sugar yields, were found among different planting densities and application rates of N, P, and K fertilizers.