基于VG模型的生物有机肥对土壤水分特性的影响
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“十二五”农村领域国家科技计划课题(2011BAD12B00 )


Using VG model to study impacts of bio-organic fertilizer on characteristics of soil moisture
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    摘要:

    土壤水分特性受土壤质地、结构、有机质、容重等因素的影响较大。为更好地了解施用生物有机肥培养的土壤水分特性,通过对室内培养的土壤进行测定,分析不同容重下不同肥料处理对土壤含水量、水分常数以及水分有效性的影响,并利用VG模型进行参数求解。结果表明:VG模型能较好拟合土壤水分特征曲线;在相同容重不同处理条件下,施加EM(effective microorganisms,有效微生物群)有机肥的土壤含水量最大,其次是施加土壤改良剂,最小的是不加任何试剂;在施加EM原液处理中,随着EM原液稀释浓度的增加,土壤含水量有不断增大的趋势;在相同处理不同容重条件下,随着容重的增大,土壤持水性和土壤水分有效性不断降低。

    Abstract:

    To investigate the moisture characteristics of soil cultivated indoors by bio-organic fertilizer,effects of different fertilizer were analyzed under varied bulk density conditions.Parameters of moisture,moisture constants,and moisture availability of soil were evaluated by using VG model.The results showed that the VG model can well fit with the moisture characteristic curve of soil.Under the same bulk density with different processing conditions,applying EM organic fertilizer influenced soil moisture mostly,following by applying a soil modifier,the least is the case without any agent.As the increase of diluted concentrations of EM dope,soil moisture increased.Under different bulk density with the same processing conditions,soil moisture-keeping nature and the availability of soil moisture reduced gradually as the increase of bulk density.

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杨红,杜辉,陶雪娟,朱玉英.基于VG模型的生物有机肥对土壤水分特性的影响[J].华中农业大学学报,2013,32(5):66-71

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  • 收稿日期:2013-02-17
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