Response of maize to phosphate released from Minjingu phosphate rock and farm yard manure applications in an oxic haplustult
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Date
1997
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Publisher
Sokoine University of Agriculture
Abstract
A glasshouse pot experiment was carried out to investigate the (Zea maize of response mays L combinations of MPR-Farm yard manure (FYM) applied to an Oxic Haplustult. were 0, .7.5,)to
various (kraal manure),The rates of FYM applied 15 and 30 g/kg and the rates of MPR were 0,
50, 100, and 150 mg P/kg soil. The MPR-manure combinations were incubated seeds.The one
for month showed results before an the sowing increase maize Bray-1-in an increase in dry
extractable P by 8.3 mg P/kg soil, matter yields of 27.3 g/kg soil and phosphate uptake by 0.13%.
The above increases were attributed to the P released from the solubilization of MPR and decomposition and mineralization of the farm yard manure.The small increases in Bray-lextractable phosphate increased with increasing indicate time of the gradual contact between solubilization,
soil-MPR and FYM decomposition and mineralization of MPR and FYM, respectively. Response by crops to phosphate released from MPR-FYM-combinat ions' would be more pronounced when applied to the soil 6 to 12 months before planting, to ensure optimal solubilization and decomposition of the MPR and FYM, respectively.
Description
Dissertation
Keywords
Phosphate rock, Soil structure, Soil texture, Soil Phosphorus