解磷生物炭基肥料制备的优化及其对葡萄生长及土壤质量的影响OACSTPCD

Taking the phosphate solubilizing bacteria X-P18 as the object,by optimizing the preparation process of biochar-based fertilizers,the phosphate solubilizing biochar-based fertilizers with high bacterial activity were prepared.With the"Queen"grape as the test object,four treatments were designed:blank,biochar,charcoal-based fertilizer and liquid fertilizer,and the effect of biochar-based fertilizer on grape quality and soil physicochemical properties was investigated by measuring the physical and chemical properties of the soil and the quality of grapes at the harvesting period.The results of the experiment found that when the mass ratio of bacterial liquid to the added biochar was 3.0∶1.0,the adsorption time was 6 h,the rotation speed during adsorption was 100 r/min,and the protective agent was trehalose with a mass ratio of 4%,the prepared biochar-based fertilizer has the most living bacteria count.At the same time,the orchard experimental data showed that compared with the blank,the biochar-based fertilizer significantly increased the content of soil available phosphorus(221.81%),and the content of alkaline hydrolyzable nitrogen,available potassium and organic matter increased to 8.30%、20.61%and 39.54%respectively,the soil fertility improvement effect is better.Compared with the blank group,the fruit shape parameters,soluble solids and soluble sugars of the grapes treated by the carbon-based fertilizer group increased by 6.64%,8.81%,and 14.95%,the total acidity decreased by 23.18%,and the solid-acid ratio increased significantly by 40.67%.Basic fertilizer can better increase the release of soil nutrients,thereby promoting better growth of grapes and improvement of soil quality.