Journals › Tropical Agricultural Research
Development of a Botanical Formulation Using Cinnamomum verum and Pongamia pinnata Leaves for Suppression of Nitrification in Soil
Tropical Agricultural Research 34(4): 407–412 · 2023
https://doi.org/10.4038/tar.v34i4.8678
Abstract
There is a growing interest in controlling nitrification by using botanical nitrification inhibitors to enhance the nitrogen (N) fertilizer use efficiency. The main objective of this study was to develop a botanical formulation (BF) with Cinnamomum verum (cinnamon) and Pongamia pinnata (karanda) leaves to suppress the nitrification rate of two soils (Red Yellow Podzolic (RYP) and Reddish-Brown Earth (RBE)) commonly used for vegetable cultivation in Sri Lanka. A BF was prepared using dried and powdered leaves of cinnamon and karanda, biochar and corn flour. The two soils were treated with BF at three rates (0, 5 and 10%, w/w) and the potential nitrification rate (PNR) was determined using the shaken slurry method in a laboratory incubation. The obtained data were analysed by Statistical Analysis Software (SAS) adopting a two factor factorial design. The BF application significantly delayed (P
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