Relative agronomic effectiveness of phosphate fertilizers for corn on limed peat from Pontianak Indonesia

Suryanto, . and Lambert K., . (1994) Relative agronomic effectiveness of phosphate fertilizers for corn on limed peat from Pontianak Indonesia. [Proceedings Paper]

The Relative Agronomic Effectiveness RAE of fine Triple Super Phosphate TSP coarse TSP Igneous Rock Phosphate IRP and Sedimentary Rock Phosphate SRP towards medium standard TSP as reference fertilizer for maize on limed peat was evaluated for three levels of P 150 300 and 600 kg P O per ha.A greenhouse experiment was conducted on ombrogenous peat from Pontianak with fine TSP 16 mesg medium TSP 16-4 mesh and coarse TSP 4 mesh Igneouse Pock Phosphate IRP apatite Palfas Africa 100 mesh and sedimentary forck phosphate SRP 100 mesh from Indonesia.Phosphorus Fertilization Efficiency PFE was also evaluated for the same type of P fertilizers.Their PFE differed significantly and decreased with the rate of P fertilizer.Corn Zea mays L. was grown on peat to evaluate RAE of P fertilizers and was harvested after two months growth.Analysis of dry weight of shoots and roots showed that RAE amounts to 50 to 60 for all P fertilizers when applied at the rate of 600 kg P205 per ha.However RAE differed for shoots and root at lower fertilizer rates.For shoots RAE of coarse TSP was always lower than for the three other P fertilizers tested.At the rate of 150 kg P2 5 per ha IRP gave the highest RAE while SRP did RAE4650 at the rate of 300 kg P2 5 per ha.For the dry weight of shoots the highest RAE was found to be at the rate of 300 kg P205 per ha while the highest RAE for the dry weight of roots was found to be at 150 kg P205 per ha.Not suprisingly the RAE expressed by using leave area followed the same trend as for dry weight of shoots although the maximum RAE never exceed ed 500.Fine medium and coarse TSP always gave the highest PFE while IRP resulted in a very low 10 PFE at any rate.Total analysis of P in the peat and in the shoots P-uptake by plant gave more information on the effectiveness and efficiency of the different types of fertilizer as well as on the possible residual effect.

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Abstract

The Relative Agronomic Effectiveness RAE of fine Triple Super Phosphate TSP coarse TSP Igneous Rock Phosphate IRP and Sedimentary Rock Phosphate SRP towards medium standard TSP as reference fertilizer for maize on limed peat was evaluated for three levels of P 150 300 and 600 kg P O per ha.A greenhouse experiment was conducted on ombrogenous peat from Pontianak with fine TSP 16 mesg medium TSP 16-4 mesh and coarse TSP 4 mesh Igneouse Pock Phosphate IRP apatite Palfas Africa 100 mesh and sedimentary forck phosphate SRP 100 mesh from Indonesia.Phosphorus Fertilization Efficiency PFE was also evaluated for the same type of P fertilizers.Their PFE differed significantly and decreased with the rate of P fertilizer.Corn Zea mays L. was grown on peat to evaluate RAE of P fertilizers and was harvested after two months growth.Analysis of dry weight of shoots and roots showed that RAE amounts to 50 to 60 for all P fertilizers when applied at the rate of 600 kg P205 per ha.However RAE differed for shoots and root at lower fertilizer rates.For shoots RAE of coarse TSP was always lower than for the three other P fertilizers tested.At the rate of 150 kg P2 5 per ha IRP gave the highest RAE while SRP did RAE4650 at the rate of 300 kg P2 5 per ha.For the dry weight of shoots the highest RAE was found to be at the rate of 300 kg P205 per ha while the highest RAE for the dry weight of roots was found to be at 150 kg P205 per ha.Not suprisingly the RAE expressed by using leave area followed the same trend as for dry weight of shoots although the maximum RAE never exceed ed 500.Fine medium and coarse TSP always gave the highest PFE while IRP resulted in a very low 10 PFE at any rate.Total analysis of P in the peat and in the shoots P-uptake by plant gave more information on the effectiveness and efficiency of the different types of fertilizer as well as on the possible residual effect.

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Item Type:	Proceedings Paper
Additional Information:	20 tables 14 refs.
AGROVOC Term:	PHOSPHATE FERTILIZERS
AGROVOC Term:	AGRONOMY
AGROVOC Term:	CULTIVATION
AGROVOC Term:	FERTILIZERS
AGROVOC Term:	INDONESIA
Geographical Term:	MALAYSIA
Depositing User:	Ms. Norfaezah Khomsan
Last Modified:	24 Apr 2025 05:27
URI:	http://webagris.upm.edu.my/id/eprint/16509

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