ISSN:
1573-0867
Keywords:
Apatite
;
biologically produced superphosphate (Biosuper)
;
Centrocema pubescens
;
Thiobacillus
;
water soluble P
Source:
Springer Online Journal Archives 1860-2000
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Notes:
Abstract Two glasshouse pot experiments and one incubation experiment were undertaken to measure the effectiveness of Sri Lanka (Eppawala) apatite rock phosphate as a fertilizer for the perennial legumeCentrocema pubescens. The apatite was applied alone, or as a mixture with elemental sulphur and soil containingThiobacelli bacteria either as powder or pellets that were either uncoated or coated with rubber (to reduce the rate of release of P thereby increasing P release for a longer-term). Application of apatite to the soil significantly increased DM yields of shoots and P content (yield × P concentration) in shoots. Application of sulphur andThiobacelli bacteria with the apatite caused further increases in yield and P contents of shoots. Pelletizing the apatite and sulphur together with a soil inoculum ofThiobacillus did not increase dry matter yields of shoots or P content of shoots compared to a mixture of apatite and sulphur in the powder form. Incubating the mixture in powder or pellet form in the laboratory increased water-soluble P extracted and decreased the pH of these mixtures. Pellets of the mixture when coated with rubber released P more slowly during incubation, but growth ofCentrocema pubescens treated with coated pellets was comparable with that for uncoated pellets.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01054734
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