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The effects of phosphate and lime fertilizer on the growth
and production of soybean plants in a former wetland

Adnan , A Azis , B A Bakar , E Rosa , S Fitri , Savitri , Fachruddin
2
2
1
4
3
3
3
1 Agriculture Faculty of Samudra University Langsa, Jl. Meurandeh, Langsa
Lama, Aceh 24354
2 Aceh Assessment Institute for Agricultural Technology, Jl. P. Nyak Makam
No.27, Lampineung, Banda Aceh
3 Agriculture Faculty of Universitas Abulyatama, Banda Aceh, Indonesia
4 Agricultural Engineering Department, Universitas Syiah Kuala, Banda Aceh,
Indonesia
Email : baskarolin2000@gmail.com

Abstract. This research aims to investigate the effects of phosphate and lime fertilizer on the
growth and production of soybean plants in a former wetland. It was carried out from May to
September 2012 at the Experimental Field of the Agriculture Faculty, Samudra University
Langsa, at a height of 3 meters above sea level (MASL) and a soil pH of 5.5. The research used
Anjasmoro soybean variety and a Factorial Randomized Block Design (RBD) with three
replications. The first factor was phosphate (P) fertilizer consisting of 4 levels, namely: P0 = No
fertilizer (0% P2O5), P1 = SP-18 fertilizer (18% P2O5), P2 = SP-36 fertilizer (36% P2O5), and
P3 = TSP fertilizer (45% P2O5). The second factor was lime fertilizer (K) comprising 3 levels,
namely: K1 = Calcite (CaCO3), K2 = Dolomite [CaMg (CO3) 2], and K3 = Burnt lime (CaO).
The results showed that phosphate fertilizer had a significant effect on plant height at the age of
30 DAP, the number of pods per polybag, the number of filled pods, the weight of dry seeds per
polybag, and the weight of 100 dry seeds; however, it had no significant effect on plant height
at the age 10 and 20 DAP, as well as on the number of productive branches. The most effective
type of phosphate fertilizer found in this research was P3 (TSP). Lime fertilizer also had a
significant effect on plant height at the age of 30 DAP, the number of pods per polybag, the
number of filled pods, the weight of dry seeds per polybag, and the weight of 100 dry seeds;
however, it had no significant effect on plant height at the age of 10 and 20 DAP as well as on
the number of productive branches. The most effective type of lime fertilizer found in this study
was K2 (Dolomite). The combination of phosphate and lime fertilizer found to have a significant
effect on the number of pods per polybag and the number of filled pods. The best combination
of phosphate and lime fertilizer was P3K2 (TSP + Dolomite) giving the best results.

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