S. M. Bakhtiar
Assistant Soil Chemist
Bangladesh Sugarcane Research Institute, Ishurdi-6620, Pabna, Bangladesh
G. C. Paul
Director Research
Bangladesh Sugarcane Research Institute, Ishurdi-6620, Pabna, Bangladesh
A. B. M. Mafizur Rahman
Associate Soil Chemist (Gr-1)
Bangladesh Sugarcane Research Institute, Ishurdi-6620, Pabna, Bangladesh
M. M. Alam
Associate Economist (Gr-1)
Bangladesh Sugarcane Research Institute, Ishurdi-6620, Pabna, Bangladesh
Sugarcane, Fertility Status, Floodplain soils, Calcareous Dark Grey soils
Char land at Pakshi, Ishurdi of Pabna, Bangladesh
Crop-Soil-Water Management
Fertilizer, Sugarcane
Four field experiments were executed in two consecutive cropping seasons of 1997-98 and 1998-99 in alluvial soils of recently developed Char land at Pakshi, Ishurdi of Bangladesh. Characteristically the soil was calcareous and sandy loam in texture with pH 8.2. The soil had total N 0.05 %, Organic C 0.84 %, and the Ca, Mg and K 22.15, 1.88 and 0.35 meq/100 gm soil, respectively. The available P, Sand Zn contents were 5.4, 15.2 and 0.34 μg g-1, respectively. Experiments were laid out in a randomized complete block design with four replications.A 30-day old settlings of variety bel 20 (previously raised in polyethylene bag) were transplanted in December each year. The unit plot size was 8m x 6m. Some common cultural practices like disease and insect control were followed when required. Separate experiments were done for individual elements, N, P, K and S. The N experiment consisted of five levels of nitrogen 0, 50,100, 150 and 200 kg ha-1 as urea. The urea-N was applied in 3 equal splits: at the establishment stage of settlings (21 d), tiller initiation stage (90 d) and at the tiller completion stage (150 d). Triple super phosphate, muriate of potash, gypsum and zinc sulphate were applied to all plots at transplantation to supply P205, K2O, S and Zn @ 110, 110, 40 and 10 kg ha-1, respectively. The second experiment comprised fi ve levels of P (0, 20, 40, 60 and 80 kg ha-1) from triple super phosphate (TSP). The full amount of TSP was applied at the time of transplanting settlings. As a basal application, nitrogen was added @ 160 kg ha-1 in three splits as before and the K, Sand Zn fertilizers were applied at the same rate as in the first experiment. The third experiment included five levels of K (0, 40, 80, 120 and 160 kg ha-1) from muriate of potash. One third of potash was applied during plantation and the rest were applied in two installments: the first at the 90 days and the. second at the 150 days of plantation. The other fertilizers were applied @ 160 kg N, 110 kg P2O5, 40 kg S and 10 kg Zn ha-1. In the fourth experiment, five levels of S (0, 20, 30, 40 and 50 kg ha-1) as gypsum were applied during settlings transplantation. N, P, K and Zn fertilizer were incorporated in the soil with the same amount and methods as followed in the first experiment. The crop was harvested after 13 months of planting. Plot-wise cane yield was recorded. The dry matter yield (leaf +cane stalk) was recorded at the time of harvest and oven dried at 65 ± 5°C.The concentrations of N, P, K and S in the dry matter were determined using standard procedures. Data were subjected to statistical analysis, and the significance of mean difference was carried out following the Least Significant Differences Test (LSD) at 5% level of significant.
Pak Sugar Journal Jan-Feb 2002
Journal