温室栽培条件下土壤碳库变化特征及其与养分有效性的关系

来源 :中国农学通报 | 被引量 : 0次 | 上传用户:Green__lucky
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为揭示温室生产对土壤质量及其肥力状况的影响,选取辽宁沈阳、北宁两地具有代表性的温室为对象,通过对温室生产现状的详细调查和测土分析,研究了土壤有机碳、相关碳库指标与土壤肥力的演变特征及其相互关系,结果表明:(1)温室土壤耕层(0~20cm)有机碳及活性有机碳的含量较露地土壤有明显增加,20cm以下则逐渐降低且低于露地土壤,其中活性有机碳的增减变化是温室土壤碳库变化的主体部分,表现出随温室使用年限延长的波动变化特征。(2)温室栽培条件下,土壤碳库活度及碳库管理指数均随使用年限的延长呈先增后减的周期性变化,变化周期为4年左右,与实际生产中温室土壤的可持续利用周期具有一致性。(3)土壤活性有机碳含量与土壤速效磷、速效钾、有效硫、有效镁、有效铁和有效锌等养分因子的含量呈极显著正相关关系,其含量变化特征可为研究温室土壤肥力质量的演变提供重要参考。 In order to reveal the impact of greenhouse production on soil quality and its fertility status, a representative greenhouse in Shenyang and Beining of Liaoning Province was selected as the object. Through detailed investigation and soil testing of greenhouse production status, the effects of soil organic carbon, The results showed that: (1) The content of organic carbon and active organic carbon in the topsoil (0-20 cm) in greenhouse increased obviously compared with that in open soil, but gradually decreased in the depth of 20 cm In open-field soils, the change of active organic carbon was the main part of the change of soil carbon pool in greenhouse, which showed the characteristics of fluctuation with the prolongation of greenhouse service life. (2) Under greenhouse cultivation, the soil carbon pool activity and carbon stock management index increased periodically and then decreased with the extension of the service life, and the period of change was about 4 years. Compared with the actual production of greenhouse soil in sustainable development Use cycle is consistent. (3) The content of soil active organic carbon was significantly and positively correlated with the contents of available nutrients such as available phosphorus, available potassium, available sulfur, available magnesium, available iron and available zinc, and the content of soil active organic carbon could be used to study the fertility quality of greenhouse soil The evolution provides an important reference.
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