Preparation of organic fertilizer from livestock manure and its effects on soil nutrition and tomato quality
Using livestock and poultry manure as the main raw material and corn straw bran as the conditioner,organic fertilizer(OF)and bio-organic fertilizer(BOF)products were produced by biological nano-composite molecular film static composting,and all products were in line with standards of NY 884-2021.Five parallel tomato cultivation experiments were designed,namely,CK(no fertilizer),CF(100% potassium sulfate compound fertilizer,400 kg/hm2),COF(80% potassium sulfate compound fertilizer+20% OF3 000 kg/hm2),CBO(80% potassium sulfate compound fertilizer+20% BOF 3 000 kg/hm2),and COB(70% potassium sulfate compound fertilizer+20% OF 2 000 kg/hm2+10% BOF 1 000 kg/hm2).After the experiment,the nutrient contents of soil,organic matter,total nitrogen,and available potassium,as well as fruit quality indicators such as soluble sugar and vitamin C content were measured.The results showed that the application of organic fertilizer could relatively increase the available nitrogen,phosphorus,and potassium in the soil,and reducing chemical fertilizer application by 20% to 30% had little effect on tomato yield.Compared to the single application of chemical fertilizer,the combined application of organic and inorganic fertilizers could significantly improve fruit quality,such as increasing soluble sugar and vitamin C content while effectively reducing the content of titratable acid and nitrate(p<0.05).Through the analysis of the main component of the impact of soil physicochemical indicators on the soil layer,it was found that the impact of each fertilization method on the soil physicochemical indicators was ranked as follows:CBO,COB,COF,CK,and CF.The correlation between six physicochemical indicators in the soil layer and tomato quality was analyzed by redundancy analysis and it was found that all six physicochemical indicators in the soil layer were significantly correlated with tomato quality(p<0.05).
万方数据
维普
