Abstract:
This study was carried out to identify suitable sugarcane varieties for commercial
cultivation in agro-ecological zone ELlc (with 1300 mm 75% expectancy value of
annual rainfall and the terrain of rolling, undulating or flat) in proposed Bibile sugar
project area during November 2007 - December 2008. Sixteen sugarcane varieties
including commercial, near commercial and a few varieties with proven results in
previous adaptability experiments were tested using an unbalanced randomized
block design. Relevant agronomic and bio-chemical data that determine cane and
sugar yields were recorded at harvest of the plant crop. The varieties SL 89-1429,
SL 89-2227, SL 88-116 and M 43859 produced significantly higher cane and sugar
yields than the commercial standard Co 775. The varieties SL 7130 and SL 97-1442
produced significantly higher cane yields compared to Co 775. The two highest
cane yielding varieties; SL 89-1429 and SL 89-2227 have proven their yielding
abilities of more than 140 metric tons per hectare confirming the results of previous
adaptability studies. Based on these results, the varieties SL 89-1429, SL 89-2227,
SL 88-116, M 43859, SL 7130 and SL 97-1442 are considered to be potential
commercial varieties in the areas coming under agro-ecological zone ILlc. Analysis
of the ratoon 1 crop yield and the combine yield (with plant crop and ratoon crop
yields) of these varieties, considering the possible effects of genotype x
environment interactions is necessary to make final recommendations. The results
of this experiment suggest that development of a cropping calendar to cultivate
sugarcane in the diverse agro-ecological area is of paramount importance to obtain
maximum output from the varieties by deciding the periods for planting and
harvesting.
