DINGXINDA: Coconut shell derived biochar to enhance water spinach (Ipomoea aquatica Forsk) growth

Coconut shell derived biochar to enhance water spinach (Ipomoea aquatica Forsk) growth

3 Feb 2021 at 20:00

Farms usually apply excessive nitrogen (N) fertilizers, especially in a vegetable production system, resulting in severe N leaching loss. Although there have been some reports on the impact of biochar on the N leaching in farmlands, most of them focused on field crops in temperate or subtropical religions. Limited information about N leaching in the tropical vegetable system is available regarding the quantitative data and effective countermeasures. A field experiment was conducted to quantify N leaching in a tropical leafy production system (Ipomoea aquatica Forsk) and to evaluate the effects of coconut activated charcoal bulk coconut shell biochar on N loss and crop growth. The results showed that compared to conventional fertilization with the 240 kg N ha-1 application rate (NPK), biomass yield of water spinach increased by 40.1% under the high biochar application rate of 48 t ha-1 :-(HBC), which was significantly higher than that of NPK treatment. Moreover, The HBC treatment decreased N leaching by 34.0%, which can be attributed to enhanced crop uptake which increased by 40.3% as compared to NPK treatment. The NH4+/NO3- ratio in leachates was between 0.01 and 0.05. www.activated-carbon-pellets.comIt was concluded that coconut shell derived biochar improved the biomass yields of water spinach and reduced the leaching N loss, which provides a promising amendment in tropical regions.



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