摘要：Cuevas VC, Banaay CGB2022Trichoderma inoculants and straw compost improved resilience and yield in Cu-contaminated rice paddiesNusantara Bioscience 14: 1-9Rice paddies in Marinduque, Philippines, are copper-contaminated from tailings of two mining companies formerly operating in the provinceAt present, paddy-soil copper concentration ranges from 22-386 mg kg-1Crops suffer from copper toxicity and water stress due to climate-related eventsThe field study was conducted to investigate the ability of in situ composted rice straw and Trichoderma microbial inoculant (TMI) to mitigate rice productivity constraintsIn treated set-ups, rice straw was scattered on the paddy after harvestTriple 14 mineral fertilizer was mixed with Trichoderma compost activator, broadcasted over the straws, and subsequently incorporated into the soil during land preparationRice seeds were TMI-coated before sowingRice straw composting was not done in control set-ups, and seeds were uncoatedMineral fertilizers were applied to both set-upsFurthermore, set-ups were categorized based on soil Cu content, such as normal, moderate, and highFour replicates were made per season and categoryIn treated paddies, rice leaves did not show yellowing, indicating adequate N mineralization and plant uptakeThe difference in yield was significantly higher (81%) in treated paddies compared to controlDuring severe drought conditions, the mean yield in treated paddies was 1.8 t ha-1, while that of control paddies was zeroThe yield was significantly correlated with K inputs mainly by compost in treated paddiesThe application of rice straw compost and Trichoderma inoculants can be an adaptive strategy for climate change resilience and mitigation of copper toxicity in crops.
