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以开封市为例,探讨了长期施肥条件下城市边缘区不同作物土壤酶活性的变化及其与土壤养分的关系。结果表明,土壤酶活性受施肥处理影响明显,其中蛋白酶、过氧化氢酶、转化酶和脲酶活性在化肥处理中均受到抑制,在有机肥中却得到大幅提升,碱性磷酸酶活性变化与之正好相反;在混施处理中各酶活性均有不同程度的增强,其中以脲酶活性增强尤为突出。土壤酶活性在各作物之间表现出一定的差异,但总的来说差异不显著。土壤各酶之间及酶与土壤肥力因素之间存在显著或极显著相关关系,因此土壤酶活性可以作为城市边缘区土壤环境质量评价的生物肥力指标之一。
Taking Kaifeng City as an example, this paper discussed the changes of soil enzyme activities and their relationships with soil nutrients under different fertilization conditions in urban fringe areas. The results showed that soil enzyme activity was significantly affected by fertilization treatment, and the activities of protease, catalase, invertase and urease were both inhibited in the treatment of chemical fertilizers, but significantly increased in the organic manure. The changes of alkaline phosphatase activity On the contrary, the enzyme activities in the mixed treatment increased to different extents, especially urease activity was particularly prominent. Soil enzyme activity showed some differences among the crops, but the difference was not significant in general. Soil enzymes and soil fertility and enzyme between the significant or very significant correlation between the soil enzyme activity can be used as the urban edge of the assessment of soil environmental quality one of the indicators of biological fertility.