灌施木醋液对土壤性质和植物生长的影响

摘要

Wood vinegar is an organic mixture which comes from condensation and separation of by-products of wood procession .Wood vinegar is acidic in property and contains over 500 kinds of organic compounds , benefiting the growth of plant and increasing the resistance to diseases .A series of pot cultivation experiments were carried out to study the effects of wood vinegar on Lou soil properties ( pH, EC, organic matter content , and structure ) and pepper growth .The results show that soil pH is decreased and soil EC is increased with the increase of adding amount of wood vinegar to soil .Applying wood vinegar with dilution of less than 5 times could increase soil organic C content , contribute to the formation of aggregates of ≥2 mm and 0.25-2 mm size classes .However , applying wood vinegar with dilution of less than 5 times harms the growth of pepper and even lead the death of pepper plants . Applying wood vinegar with dilution of more than 50 times promotes the growth and increases the yield of pepper . Therefore , irrigating wood vinegar with dilution of 3-5 times is recommended during fallow periods , dilution of 50-250 times during crop growth season .%本研究以木醋液为研究材料，采用培养试验的方法，研究了灌施不同稀释倍数的木醋液对土性状（ pH、电导率、土壤结构、有机碳）和辣椒生长的影响。结果表明，灌施木醋液后土壤pH随灌施量的增大而降低，EC值随灌施量增大而升高；灌施木醋液（稀释倍数小于5倍）能够显著提高土壤有机碳的含量，可增加≥2 mm、0.252 mm级别土壤团聚体的数量，有利于大团聚体的形成。生物试验表明，稀释5倍以下的木醋液对辣椒产生毒害作用，稀释50倍以上的木醋液可以促进辣椒生长，并增加其产量。综合考虑，建议在农田休闲季节灌施木醋液的稀释倍数为35倍左右，在作物生长季节灌施木醋液的稀释倍数为50250倍。