有机肥替代部分化肥对南方桉树人工林土壤肥力的影响

Effect of Organic Fertilizer Replacing Part of Chemical Fertilizer on Soil Fertility of Eucalyptus Plantation in Southern China

化肥可以很好地满足作物生长发育对营养的需求,增加作物产量。然而,过度使用化肥会造成土壤污染和环境负荷增大,不利于农林业的可持续经营。为了验证有机肥替代部分化肥对于南方桉树人工林土壤肥力的影响,本研究以亚热带区域桉树人工林为研究对象,开展了肥料对比试验,通过测定土壤肥力评价指标,并采用内梅罗指数法对土壤肥力进行评价。结果表明:有机肥替代部分化肥的处理土壤肥力指数较仅施用化肥的处理有显著提高,其中有机肥替代15%化肥的处理土壤肥力指数达到了0.549。说明采用有机肥替代部分化肥的施肥方式可以显著改善土壤肥力,并在一定程度上提高土壤肥力水平。

Chemical fertilizers can effectively meet the nutritional requirements of crop growth and development,and increase yield of crop.However,excessive use of chemical fertilizers can cause soil pollution and increased environmental load,which is not conducive to the sustainable management of agriculture and forestry.In order to verify the effect of replacing part of fertilizer with organic fertilizer on the soil fertility of eucalyptus plantation in southern China,this study conducted fertilizer comparison experiment by taking the eucalyptus plantation in subtropical region as the research object,the soil fertility was evaluated by measuring soil fertility evaluation indicators and using the Nemero index method.The results showed that the soil fertility index of the organic fertilizer replacing part of chemical fertilizer treatment was significantly higher than that of the chemical fertilizer treatment,and the soil fertility index of the organic fertilizer replacing 15%chemical fertilizer treatment reached 0.549.The results indicated that the application of organic fertilizer replacing part of chemical fertilizer could significantly improve soil fertility,and increase the level of soil fertility to a certain extent.