膜下滴灌追肥对黄秋葵果荚营养品质、老化进程及土壤理化性质的影响OA

Taking'fruit okra'as experimental material,a randomized block design was adopted to set up five mulched drip irrigation top-dressing treatments,CK(sakfu 30 kg),T1(sakfu 30 kg+urea 2 kg),and T2-T4(sakfu 20 kg combined with amino acid water-soluble fertilizer 500×+rootle shi 1 L,seaweed extract water-soluble fertilizer 1 500 ×+rootle shi 1 L,and chitosan 2 kg+rootle shi 1 L,respectively).After three top-dressing applications,soil physicochemical properties,enzyme activities,pod senescence indicators and fruit quality were determined to screen for the optimal top-dressing scheme that could improve soil conditions,delay pod senescence and enhance fruit quality,in order to provide reference for delaying the aging of okra through cultivation measures in production.The results showed that compared with CK,treatments T2-T4 with reduced chemical fertilizer and increased functional organic fertilizer showed significant effects.At the soil level,soil physicochemical properties and enzyme activities were significantly improved.Specifically,T2 treatment significantly increased soil urease and invertase activities,and available nitrogen and phosphorus contents compared with CK,while reducing pod cellulose content to delay senescence,and significantly improving fruit quality indicators such as soluble sugar,soluble protein and total flavonoids.In conclusion,reducing chemical fertilizer combined with functional organic fertilizer could effectively improve soil environment,delay pod senescence and enhance fruit quality,with T2 treatment showing the best comprehensive effects and being recommended for practical production application.