Microbially Improved Phosphorus Fertilizer for Rice Cultivation

Hits: 431
Research areas:
Year:
2020
Type of Publication:
Article
Keywords:
Biofilms, Biosolubilization, Department of Agriculture Fertilizer Recommendation, Eppawala Rock Phosphate, Triple Super Phosphate
Authors:
J. P. H. U. Jayaneththi; G. Seneviratne; H. M. S. P. Madawala; M. G. T. S. Amarasekara
Journal:
IJRIES
Volume:
7
Number:
6
Pages:
86-94
Month:
November
ISSN:
2394-1375
BibTex:
Abstract:
Eppawala Rock Phosphate (ERP) has been identified as a virtuous alternative for Triple Super Phosphate (TSP). However, its application is limited due to low solubility. By enhancing the biosolubility, ERP may be used as a phosphorous (P) fertilizer for annual crops. Certain biofilms (BF1, BF2, BF3 and BF4) have been identified as potential ERP solubilizers, among them BF3 was most effective. Thus, this study was designed to test the potential of BF3-enriched ERP to replace the TSP in rice cultivation. A soil leaching tube experiment was conducted under laboratory condition with six treatments. Rice fertilizer mixture (CFE) recommended by the Department of Agriculture (DOA) was modified (CFM) by replacing TSP-P from BF3-enriched ERP-P with reduced dosages of nitrogen (N) and potassium (K). Different rates (65%, 85% and 100%) of BF3-enriched ERP in CFM were tested against CFE, and soil alone (control). The experiment was arranged in a Completely Randomized Design (CRD) with three replicates. In every two weeks, solubilized P was recovered by leaching for three months. Results reveled that, BF3 enriched 100% ERP recorded significantly (p