甘蔗品种RB72454和新台糖25号区域品比试验初报

分别在广西的南宁、百色、降安和北海等地以桂糖11号作对照，对两个新引进的甘蔗品种进行品比区试。一年的新植试验结果表明：蔗茎产量最高的是RB72454（桂引5号），平均在124928kg/hm^2，比对照桂糖11号增产37．5％，增产十分显著，新台糖25号的平均产量为87218kg/hm^2，比桂糖11号减产4．0％，差异不显著，三个参试品种试验收期平均蔗糖分差异不显著，田间锤度从高到低依次为新台糖25号＞RB72454＞桂糖11号，单位面积含糖量RB72454比桂糖11号增40．3％，新台糖25号比对照减4．0％，本文还比较和评估了两个新品种的农艺性状及在广西蔗区的推广应用前景。

A Preliminary Report of Regional Trials of Sugarcane Varieties RB72454 and ROC25

The two newly introduced sugarcane varieties and the CK variety Guitang 11 (GT11) were tested comparatively in Nanning, Baise, Beihai and Longan area. The results of one year new planting experiment show that the mean cane yield of RB72454 (Guiyin NO.5) is the highest of three varieties. It reaches 124928 kg/hm2, increasing 37.5% compared with GT11, and this difference is greatly significant. The mean cane yield of ROC 25 is 87218 kg/hm2 decreasing 4.0% comparing with GT11, but without significant difference. The mean sugar content difference among three experiment varieties is not significant in harvesting period. The brix of RB72454 is higher than GT11 and less than ROC 25. The unit sugar yield of RB72454 is 40.3% higher than that of GT11, and that of ROC 25 is 4.0% less than that of GT11. This paper also compared and evaluated the new varieties' agricultural character and the prospects to extend the varieties in Guangxi.