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采用间歇淋洗好气培养法研究了东北黑土中3种不同微生物来源氨基糖(氨基葡萄糖、胞壁酸和氨基半乳糖)的矿化动态以及对葡萄糖添加和葡萄糖与氮肥配施的响应.结果表明:土壤中不同种类的氨基糖具有不同的矿化特征.培养期间胞壁酸含量减少25.4%而氨基葡萄糖含量降低7.1%,表明细菌来源的胞壁酸在土壤中的矿化速率快于真菌来源的氨基葡萄糖,但氨基葡萄糖的矿化数量(68.4 mg.kg-1)显著高于胞壁酸(15.4 mg.kg-1).葡萄糖添加以及葡萄糖与氮肥配施均显著提高了土壤中氨基葡萄糖和胞壁酸的含量,但两种处理的影响有所不同.相比之下,氨基半乳糖在土壤中矿化较慢,并且受外源物质的影响较小,表现出较高的稳定性.
The mineralization dynamics of amino sugar (glucosamine, muramic acid and galactosamine) from three different microorganisms in northeastern China were studied by intermittent leaching and aerobic culture, and the responses to glucose addition and glucose and nitrogen fertilizer application were studied. : Different kinds of amino sugars in soil have different mineralization characteristics.The content of mural acid decreased by 25.4% and the glucosamine content decreased by 7.1% during culturing, indicating that the mineralization rate of mucolytic acid in soil is faster than that of fungi But glucosamine mineralization (68.4 mg.kg-1) was significantly higher than that of muramic acid (15.4 mg.kg-1). Glucose addition and application of glucose and nitrogen significantly increased the content of glucosamine in the soil And muramic acid, but the effects of the two treatments were different.In contrast, galacto-oligosaccharides mineralized slowly in the soil, and less affected by exogenous substances, showing higher stability .