有机肥配施生物炭对土壤肥力和花生产量的影响OA

This study aims to clarify the effects of combined application of organic fertilizer and biochar on soil fertil-ity,peanut yield,and quality in the main peanut production region of eastern Henan province,providing a theoretical basis for improving the soil environment and establishing a scientific and environmentally friendly fertilization system in this area.A field experiment was conducted in Minquan County,Shangqiu City,Henan province,using the high-oil and high-yield peanut variety Shanghua 21 as the test material.A randomized block design was employed with six treatments:conventional fertilization as the control(CK),conventional fertilization+organic fertilizer(Y1),and conventional fertilization+organ-ic fertilizer combined with four different biochar application rates(2.5 t/hm2,3.0 t/hm2,3.5 t/hm2,4.0 t/hm2,labeled Y2 to Y5,respectively).The experiment lasted for two consecutive years.Soil samples from the 0-20 cm layer were collected at peanut maturity stage to determine soil organic matter content,available nutrient content,and en-zyme activity indicators.Peanut yield and quality-related indicators were measured simultaneously.The results showed that compared with CK,treatments Y3 and Y4 performed better in enhancing soil organic matter content,available nutrient content,nitrate nitrogen content,ammonium nitrogen content,and soil enzyme activity.In 2024,compared with CK,treatments Y3 and Y4 significantly increased peanut pod yield and kernel yield(P＜0.05).Furthermore,compared with CK,treatments Y2 and Y3 significantly increased the oleic acid and linoleic acid content in peanut kernels over the two-year experiment(P＜0.05).Additionally,correlation analysis revealed that soil organic matter content and sucrase activity were significantly positively correlated with peanut yield(P＜0.01),and soil urease activity was significantly positively correlated with kernel oleic acid and linoleic acid content(P＜0.01).In conclusion,applying an appropriate amount of biochar in sandy loam soil can improve soil nutrient status,leading to increased peanut yield and optimized quality.Among the treatments,Y3 and Y4 showed better overall performance in improving soil nutrient levels and peanut yield,while Y2 and Y3 were more effective in enhancing peanut kernel quality.