Use of industrial waste and by-product as a P source for improving crop production
1998
Latif, A. | Hamid, A. | Alam, S.M. | Iqbal, Z. (Nuclear Inst. for Agriculture and Biology, Faisalabad (Pakistan))
Dicalcium phosphate (DCP) and bone meal (BM) are the industrial bye- products and waste of Leiner Pak Gelatine Limited, Kala shah Kakoo, near Lahore, which contains 42% and 20% P2O5 respectively. Considering the high content of P in these materials, a pot experiment on maize was conducted to test then as P source and compare with the standard P fertilizers like SSP, DAP and TSP. Each P source was applied at the rate of 50 mg P kg-1 soil. Nitrogen at the rate of 100 mg kg-1 soil was applied in two splits. The dry matter of 43 days old maize plants indicated DCP significantly increased the DMY and P content of the plants. Residual effect was also tested by growing wheat in the same pots after maize. The data showed that residual effect was also tested by growing wheat in the same pots after maize. The data showed that residual effect of bone meal was significant to increase the dry matter yield and P content in wheat as compared to SSP, TSP, DAP and DCP in the same crop. The treatments where maize produced good yield, wheat produced poor yield and vice versa. This indicates that P from SSP, DAP, DCP and TSP was utilized by maize plants and a little P was left for wheat crop. It may be concluded that DCP holds a good promise as P fertilizer for crop production. Bone meal proved to be a useful source for the subsequent wheat crop.
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