Reusing pineapple residue to promote nutrient cycling and reduce GHG emissions in small-scale pineapple cultivation
Reena Macagga1, Rinan Bayot2, Pearl Sanchez2, Mathias Hoffmann1
1Leibniz Centre for Agric. Landscape Res. (ZALF), Germany
The Philippines is one of the largest producers of pineapples in the world, with an annual production of over 2.8 million metric tons. However, pineapple production can also generate large amounts of pineapple residues (PR) that are usually not further utilised. They are often left to rot or burned mainly because of the high cost and labour needed for further utilisation, especially in small-scale cultivation. This practice creates challenges that are common globally, which include reducing the climate impact of cultivation while maintaining soil fertility and high resource efficiency. To address this, we hypothesise that reusing PR through soil incorporation in small-scale pineapple cultivation can promote nutrient cycling (C/N/P/K) and soil fertility while decreasing GHG emissions, particularly by increasing soil C sequestration. Additionally, we hypothesise that PR reuse can help reduce the use of mineral fertiliser, while still maintaining soil fertility and decreasing CO2 emissions. To date, longer-term field studies regarding the effects of reusing PR in small-scale pineapple cultivation are still scarce. Using combined field and laboratory experiments, we aim to compare different PR reuse treatments against the common practice of using only mineral fertiliser and their effects on GHG (CO2 and N2O) emissions and nutrient cycling (C/N/P/K).
Keywords: C sequestration, field trial, resource efficiency, soil fertility
Contact Address: Reena Macagga, Leibniz Centre for Agric. Landscape Res. (ZALF), Müncheberg, Germany, e-mail: reena.macaggazalf.de