沼液对姜荷花生长及土壤酶活性的影响OA

Under intensive cultivation,continuous cropping of Curcuma alismatifolia Gagnep fields often leads to replanting obstacles,resulting in yield reduction and quality deterioration.To investigate the alleviating effects of biogas slurry on continuous cropping barriers in Curcuma alismatifolia Gagnep,a pot experiment was conducted using the'Curcuma Laddawan'variety of Curcuma alismatifolia Gagnep.Plants were grown in both continuous and non-continuous soils and treated with five concentrations of biogas slurry(0%,25%,50%,75%and 100%).The results showed that biogas slurry application significantly improved plant height,leaf length,leaf width,and pseudostem diameter,enhanced antioxidant enzyme activity(such as peroxidase),and promoted the accumulation of soluble sugars.In addition,soil enzyme activities,including urease,sucrase,and catalase were markedly increased with higher biogas slurry concentrations,with more pronounced restoration effects observed in continuous cropping soils.Comprehensive analysis indicated that biogas slurry concentrations of 50%-75%were most effective in promoting plant growth and morphological development.For non-continuous soils,a concentration range of 25%-50%was recommended,whereas for soils with significant replanting obstacles,50%-75%was optimal to achieve both nutrient supplementation and microecological restoration.These findings provided a theoretical basis for the resource utilization of biogas slurry and the sustainable management of continuous cropping barriers in Curcuma alismatifolia Gagnep cultivation.