固氮甘蔗新品种RB72-454引种及试验示范

引进固氮甘蔗新品种RB72-454,于2003~2005年在贞丰、望谟坝、坡地进行田间氮肥敏感性、不同用种量、吨糖田土配套技术研究试验示范。结果表明:RB72-454施用尿素20 kg/667m2比F134(CK)施用尿素40 kg/667m2增产41.5%,蔗糖分提高1.24%(绝对值),单位面积产糖量增加59.5%;每667m2用种量8 000芽比10 000芽增产7.5%,蔗糖分提高0.5个百分点,单位面积产糖量增加11.0%,节本增效336.4元/667m2;吨糖田土配套技术集成实施产糖量达1 066 kg/667m2,比F134增加47.9%;示范1 333.3 hm2,平均比F134增产37.7%,蔗糖分提高1.18个百分点,单位面积产糖量增加49.0%,增收810元/667m2,项目累计新增产值3 960万元,取得经济效益2 140.4万元。

Introduction and Demonstration of RB72-4549(a New Sugarcane Variety) with Nitrogen Fixation

RB72-454,a new introduced sugarcane variety, was tested to investigate effects of different N and seed amount on its yield on the ground and slope soils in Zhenfeng and Wangmo counties during 2003~2005.The results show that the yield,cane sugar and sugar content of RB72-454 with 20kg/667m~2 of N are 41.5%,1.24% and 59.5% higher than those of F134(CK) with 40kg/667m~2 of N respectively,the yield,cane sugar and sugar content of 8000 buds/667m~2 are 7.5%,(0.5%) and 11.0% higher than those of 10000 buds/667m~2 separately and the former can save 336.4 yuan/667m~2 compared with the latter.The sugar yield of RB72-454 with a comprehensive cultivation technique is up to 1066kg/667m~2,47.9% higher than F134 and the average yield,cane sugar and sugar content of RB72-454 in 1333.3ha are 37.7%,1.18% and 49.0% higher than F134 respectively and the former can increase the income of 810yuan/667m~2.