巴西甘蔗品种在广西的种性表现及利用前景

先后从巴西引进了一批具有生物固氮能力,低耗氮肥的甘蔗品种.2003～2004年选择其中6个固氮甘蔗品种,以桂糖11号（CK1）和ROC16（CK2）为对照种进行品比种性试验,1年新植1年宿根结果表明：RB86/7515、RB72/454、RB92/8064表现中熟、高糖、丰产、宿根性强,公顷产蔗量比CK2增22.6%～29.3%,比CK1增16.4%～22.8%,公顷含糖量比CK2增20.3%～22.4%,比CK1增15.9%～17.9%,这3个品种可作为中熟品种在广西蔗区繁殖推广,也可作为高产及强宿根亲本杂交利用.其余参试品种的综合表现不及CK1、CK2,其中SP80/1842可作为高糖种质利用,NA5679、RB83/5089可作为固氮种质保存.本文对RB86/7515、RB72/454、RB92/8064等品种的形态特征,农艺特性进行描述.

Performances and Application Prospects of Several Brazilian Sugarcane Varieties in Guangxi

A group of varieties, which have biological nitrogen fixation ability, have been introduced from Brazil. During 2003-2004, six sugarcane varieties were chosen from them to conduct a regional trial with two control varieties:Guitang11(GT11, CK1)and ROC16 (CK2). The results of one plant crop and one ratoon experiment showed that the performances of RB86/7515, RB72/454 and RB92/8064 were mid-large stalked, intermediate maturing, high yielding with high sugar and excellent ratooning capacity. Their cane yields were 22.6 % -29.3 % higher than that of CK2, and 16.4 % -22.8 % higher than that of CK1. Their sugar yields were higher than that of CK2 by 20.3 % -22.4 % , and that of CK1 by 15.9 % -17.9 % . They could be extended as intermediate maturing varieties in Guangxi, and they might be used as parents for their high yielding ability and excellent ratooning capacity in hybrid breeding. The other three varieties performed not as good as the CK1 and CK2 did, but SP80/1842 might be a good germplasm for high sugar content, both NA5679 and RB83/5089 showed strong biological nitrogen fixation capacity that might be used in breeding. In this paper, the agronomic and morphological characteristics of RB86/7515, RB72/454 and RB92/8064 were described.