Green Global
Foundation   Journal
...an emerging window for scientific research and publication across the globe

PHOSPHORUS MANAGEMENT EFFECTS ON P FRACTIONS IN SOILS AS NUTRITION FOR RICE (Pages : 6 - 13)

An incubation study in the lab and a pot experiment were conducted to know the distribution of native and applied P in the soils and its effect on rice (BRRI dhan28). There were two treatments namely control and P amendment (200 mg kg-1) maintaining. Three replications were used in the experiments. The texture of Old Brahmaputra Floodplain and Bangladesh Agricultural University farm soils, Khulna and Madhupur soils, Bogra, Haji Mohammad Danesh Science and Technology University farm and Kushdaha soils were silt loam, loam, silty clay loam, sandy loam and silty clay, respectively. The initial status of labile P, Fe/Al-P and Ca/Mg-P of the different soils were 3.16 to 15.36, 16.48 to 86.42 and 10.59 to 68.18 mg Kg-1, respectively. Addition of 200 mg P per kg soil increased the labile P, Fe/Al-P and Ca/Mg-P ranging from 2.23 to 35.60, 26.95 to 68.33 and 18.34 to 40.73%, respectively over the initial status. Due to cropping, a remarkable depletion was found in post-harvest soils in non-treated pots and the depleted amount ranged from 13.65 to 28.73, 1.46 to 8.33 and 0.63 to 2.87% for labile P, Fe/Al-P and Ca/Mg-P, respectively over the initial status. In treated pots, the depletion of labile P, Fe/Al-P and Ca/Mg-P varied from 1.96 to 4.10, 0.95 to 5.01 and 0.35 to 1.97 mg kg-1, respectively while percent use efficiency were 61.57 to 745.45, 28.19 to 92.40 and 10.17 to 42.27%, respectively. Application of P increased the dry matter yield of rice in all the selected soils. Download