The Effects of Sludge Extract on Plant Morphology and Yield
This study focuses on Tagetes erecta L.,Zinnia elegans and Impatiens balsamina,three common garden plants with both ornamental and practical value.Using pot experiments,the effects of the application of sludge extract on plant height,weight,stem diameter,flower diameter and yield of these plants were investigated.The effects of the application of sludge extract were examined at different dilution ratios(400,500,600,700,800 times),with the optimal application concentration determined through comprehensive evaluation.The application of sludge extract significantly promoted the growth of the three plants,with significant increases in plant height(up to twice),weight,and flower yield versus the water control group.The effects were comparable to or superior to some commercially available foliar fertilizers.The optimal dilution ratio was around 600 times;however,excessive concentration inhibited plant growth.Additionally,there was a clear correlation between different treatments,suggesting that the application of sludge extract can be moderately adjusted according to the production needs.The comprehensive study results demonstrate that converting sludge extract into liquid fertilizer provides a new avenue for the utilization of sludge as a resource in wastewater treatment plants.
万方数据
维普
