Effects of lime application alone and biochar combined application on soil quality and wheat growth in fallow fields
Through pot experiments,the effects of single application of lime based conditioners and combined application of biochar on the physical and chemical properties of fallow soil,and the growth and nutrient absorption of wheat seedlings were investigated,aiming to provide references for rapidly reducing acidity,improving quality,and enhancing crop yield in refarmed acidified soil.The results showed that compared with the control(without the application of conditioner),the application of conditioners in acidic soil(pH 5.35)increased the soil alkaline hydrolyzable nitrogen,available phosphorus,and available potassium content,with increases of 0.15%-7.93%,2.38%-8.34%and 6.68%-21.33%,respectively.It also increased the fresh and dry root weight of wheat on acidic soil,with increases of 2.78%-15.63%,1.14%-15.23%,respectively.The total root length,root volume and total surface area of single application of limestone powder increased 10.75%,13.65%and 11.98%compared to CK.The application of lime conditioner alone and combined with biochar increased the total nitrogen,total phosphorus,and total potassium content in the above-ground wheat,with increases of 2.78%-12.92%,2.27%-7.70%and 5.37%-9.44%,respectively.The increase in total nitrogen and total phosphorus content in wheat roots ranged from 18.82%-24.27%,12.24%-22.37%,respectively.The application of biochar alone had a promoting effect on soil alkaline nitrogen and available potassium content;the combination of lime based conditioners and biochar could promote the increase of soil available phosphorus content,wheat biomass,and soil nitrogen,phosphorus,and potassium nutrients.
万方数据
维普
