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Effects of Interaction of Tillage Method with Soil Conditioner on Soil Physicochemical Properties and Peanut Yield

The effects of interaction of tillage method( ridge tillage and conventional flat-tillage) with soil conditioner on soil physicochemical properties and peanut yield were studied by field experiment with split-plot randomized block design,so as to provide scientific basis for peanut high-yield cultivation in lime concretion black soil area. The results indicated that the interaction of ridge tillage with soil conditioner decreased the soil water content,bulk density and surface hardness,increased the soil p H value and salt concentration,leaf SPAD values,plant height,lateral branch length,branch number,fruit branch number. The ridge tillage increased the peanut yield by 5. 7% —12. 0%,compared with conventional flat-tillage. Soil conditioner application increased the peanut yield by 7. 4% —18. 6% under conventional flat-tillage,and 5. 6% —25. 6% under ridge tillage,compared with the treatment without soil conditioner,and the effect order of soil conditioner was straw ash biochar humic acid. Based on these results,the treatment with straw ash under ridge tillage had the highest yield and better improvement for soil,which could be recommended for demonstration application in peanut production.