Characterization and preliminary evaluation of factors for early growth in sugarcane (Saccharum officinarum)
2003
Aboagye, L.M., Plant Genetic Resources Centre, CSIR, P. 0. Box 7, Bunso, Ghana; | Terauchi, T., Japan International Research Centre for Agricultural Sciences, Okinawa Sub-tropical Station. 109/-/ | Matsuoka, M., Japan International Research Centre for Agricultural Sciences, Okinawa Sub-tropical Station. 109/-/
Sugarcane has a very slow growth during the early part of Its life. An experiment was conducted under field conditions to identify, characterize, and evaluate traits that could improve its productivity during this phase. Two sugarcane cultivars, Ni9 and NiFJ, were used. They were planted at an average of 4.16 plants mol normal density (HD) and 6.25 plants m" high density (HD). The cultivars were sprayed with GA, to modify the canopy structure. and the growth characteristics were analyzed. For dry matter production and leaf characteristics, di fferences between the treated and control plants were significant in most of the traits studied at I month after the treatment. In the later stages. the differences between the treatment and the control were not significant, but the ditlerences between Ni9 and NiF3ND and between NiF3ND and NiF3HD were signiticant. Within the canopy structure. leaf area concentration and leaf area index (LAI) were greater in the control of the cultivars, resulting in reduced light penetration. In the treatments with arclatively lower LAI and even distribution of leaf area. Light penetration was greater. Ideal traits proposed for higher productivity in the early growth phase in sugarcane include moderately tall plant. long and large leat: even distribution of leaf area in the canopy, maximum but not excessive number of tillers. and greater dry matter allocation for leaf development.
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