ABSTRACT
The experiment was carried out in farmers’ field locations at Northern Panchagarh and Dinajpur districts under Old Himalayan Piedmont Plain Soils (AEZ-1) of Bangladesh during the cropping season of 2014-2015. For this study six selected varieties viz: Isd 37, Isd 38, Isd 39, Isd 40, BSRI Akh 43 and BSRI Akh 44 were planted following RCB design with three replications. Significant differences were observed for germination, tiller population, stalk diameter, millable cane, cane yield and brix (%) in both locations. At Panchagarh, the highest cane yield (96.57 tha-1) was found in Isd 37 that was followed by Isd 39 and BSRI Akh 44, respectively. On the other hand, the highest cane yield (108.45 tha-1) was found from Isd 39 that was followed by Isd 37 and BSRI Akh 44 at Dinajpur location. The highest brix (%) was observed in Isd 39 at both locations which followed by Isd 37 and BSRI Akh 44. At Panchagarh location, the highest BCR (2.31) was achieved from Isd 37 that was followed by Isd 39 and BSRI Akh 44 whereas at Dinajpur location the highest BCR (2.54) was achieved from Isd 39 that was followed by Isd 37 and BSRI Akh 44.
Key words: Sugarcane, brix (%), cane yield, benefit cost ratio

Introduction

Sugarcane (Saccharum officinarum L.) is a cash crop, main source of white sugar and also source of gur in Bangladesh. It is a commercially important crop that accounts for approximately 65% of the global sugar production (Deho et al., 2002). Besides sugar production, it also produces numerous valuable by-products like alcohol, used in pharmaceutical products; ethanol, used as a fuel; bagasse; used for paper and chip board manufacturing; and used as a rich source of organic matter as well as nutrients for sustainable crop production (Majid, 2007). It is cultivated in many of the world countries with Brazil as a major producer followed by India, China, Thailand, Pakistan and Mexico (FAOSTAT, 2013). In Bangladesh the cane yield is around 46 tha-1 which is quite low in comparison to other sugarcane growing country (Islam et al., 2017). The main reasons for the low yield of sugarcane in our country are infertile soils (low organic matter), irrigation constraints, traditional farming system, climatic hazards and non availability of promising varieties (Naich et al., 2006). Sugarcane production could never be improved until and unless promising varieties and technologies are adopted on large scale (Glaz, 2000). Considering the fact a study evaluate the performance of some promising sugarcane varieties for replacing low yielding existing traditional sugarcane varieties in farmers’ field in Northern region of Bangladesh.