Mazumder Payal, Pm Akhil, Khwairakpam Meena, Mishra Umesh, Kalamdhad Ajay S
Centre for the Environment, Indian Institute of Technology Guwahati, Guwahati, Assam, 781039, India.
Department of Civil Engineering, National Institute of Technology Agartala, Tripura, 799046, India.
J Environ Manage. 2021 Jul 1;289:112461. doi: 10.1016/j.jenvman.2021.112461. Epub 2021 Apr 5.
The application of compost has been recognized as one of the most promising approaches for preserving soil quality and crop production. The present study exhaustively investigates the impact of Water Hyacinth Compost (WHC), Hydrilla verticillata Compost (HVC) and Vegetable Waste Compost (VWC) on soil nutrient quality and engineering properties [Bulk Density (BD), water retention and specific gravity]. For the study, six different proportions constituting 5, 10, 15, 25, 35 and 45% of the composts by weight of the soil were taken. The soil compost mixtures were evaluated at different periods (0, 15, 30, 45, 60 and 120 days) for various nutrients [Na, Mg, P, K, Ca, Total Organic Carbon (TOC), Total Kjeldahl Nitrogen (TKN)], BD, water retention capacity, change in specific gravity and Cation Exchange Capacity (CEC) values. It was observed that when the percentage of compost was increased to 15-45%, it resulted in enhanced nutrient value of the soil. Also, for WHC, HVC and VWC 60 days was sufficient to improve the soil quality to its maximum extend. Based on the optimized physico-chemical properties generated from the Response Surface Methodology (RSM) model, it was found that compared to WHC and HVC, the VWC performed better results viz., generating low BD (0.87 g/cm), high water retention capacity (45.63%) and degree of saturation (77.49%) of the soil. While WHC, HVC and VWC can be used to improve soil nutrient content and overall physico-chemical parameters in long terms, VWC could be more efficient and beneficial to degraded soil for restoring soil health.
堆肥的应用已被公认为是保持土壤质量和作物产量最具前景的方法之一。本研究详尽调查了凤眼莲堆肥（WHC）、黑藻堆肥（HVC）和蔬菜废弃物堆肥（VWC）对土壤养分质量和工程性质[容重（BD）、持水性和比重]的影响。在本研究中，采用了六种不同比例的堆肥，按土壤重量计分别为5%、10%、15%、25%、35%和45%。在不同时期（0、15、30、45、60和120天）对土壤-堆肥混合物的各种养分[钠、镁、磷、钾、钙、总有机碳（TOC）、凯氏定氮法总氮（TKN）]、BD、持水能力、比重变化和阳离子交换容量（CEC）值进行了评估。结果发现，当堆肥百分比增加到15%-45%时，土壤的养分价值得到提高。此外，对于WHC、HVC和VWC，60天足以使土壤质量得到最大程度的改善。基于响应面法（RSM）模型生成的优化物理化学性质，发现与WHC和HVC相比，VWC表现出更好的结果，即产生较低的BD（0.87 g/cm）、较高的持水能力（45.63%）和土壤饱和度（77.49%）。虽然从长远来看，WHC、HVC和VWC都可用于改善土壤养分含量和整体物理化学参数，但VWC对退化土壤恢复土壤健康可能更高效且有益。
