Effects of ratooning on yield and yield components of non-irrigated sugarcane germplasm accession in the southern Guinea savanna zone of Nigeria
2001
Olaoye, G., Department of Crop Production/Sugar Research Institute, .University of Ilorin, P. M B. J 5J 5, Il~rin, Nigeria
The effects of ratooning on cane yield and its components were investigated in 48 sugarcane accessions grown under non-irrigated conditions in a typical savanna ecology of Nigeria. Cane yield suffered the highest percentage loss, ranging trom 58 in the tirst ratoon crop (FRC) to 74 in the third ratoon crop (TRC), while sucrose in the juice, stalks/stool and leaf area were relatively unaffected by ratooil cropping. Yield loss(%) was highest in the flowering (F) than in the non-flowering (NF) genotypes, carly and mid-flowering (EF, MF) genotypes than in the late-flowering (LF) genotypes. Results further showed that one' of the check varieties (var.· C0957) had greater adaptation to low available soil mristure than the others, while var. CO1001 had very poor tolerance level to soil moisture stress. For the economics of sugarcane production, the maintenance of ratoon crops, more than the second ratoon crop (SRC) in the F varieties and the TRC in the NF varieties may be unprofitable for growers who depend on natural rainfall in this zone
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