Available P of different fertilizers in limed podzolic Jasinga and its effects on corn growth
1999
Novpriansyah, H. (Universitas Lampung, Bandar Lampung (Indonesia))
The high content of exchangeable-Al on Podzolic soil can cause P-limitation because P is bounded as complex compound, which is not easily available. This research was done for knowing the effect of lime application on P-availability from several fertilizers sources and its effect on maize growth on podzolic Jasinga. Treatment were conducted on factorial completely randomized design with two factors, which are P sources and lime doses. P sources are without P (P0), TSP (P1), Rock Phosphate (P2), PARP 50 percent (P3) and PARP 70 percent (P4). Lime doses are 0 percent exchangeable-Al (K0), 50 percent exchangeable-Al (K1), 100 percent exchangeable-Al (K2), and 200 percent exchangeable-Al (K3). The result showed that the P-fertilizers and lime application is very significant in reducing exchangeable-Al from 14.40 to 0.33 me/100 g; increasing P-available from 1.30 to 13.03 ppm; and increasing plant height and dry weight, P-available of TSP, Rocks phosphate, PARP 50 percent and PARP 70 percent on lime treated soil are not significant different, even it shows on 50 percent exchangeable-Al doses the concentration P-available of PARP 50 percent and 70 percent are higher than that of TSP. There is no different on the maize growth as affected by P application and the highest increase is reached by application of 50 percent-100 percent exchangeable-Al lime doses
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