论文部分内容阅读
在实验室条件下 ,蚯蚓的活动能提高高沙土、黄泥土、红壤中氮素矿化量 ,但对 3种土壤中矿质氮含量的影响不同 ,以对高沙土的影响最为显著 ,对黄泥土的影响最小。向土壤中加入 0～ 40 0mg/kg的锌对土壤氮素矿化量没有明显影响。加锌量在 2 0 0mg/kg以下时对土壤硝化作用和反硝化作用有促进作用 ,高于该水平则有抑制作用。加锌量在 0～ 40 0mg/kg范围内 ,蚯蚓对土壤氮素矿化、硝化和反硝化活性的促进作用不受加锌量的影响
Under laboratory conditions, the activities of earthworms increased the amount of nitrogen mineralization in high-sandy soil, yellow soil and red soil, but had different effects on the mineral nitrogen content in the three soils, which had the most significant impact on high-sandy soil. The least impact. Adding 0-40 mg / kg zinc to soil had no significant effect on soil nitrogen mineralization. Adding zinc below 200 mg / kg can promote soil nitrification and denitrification, but inhibit the growth of soil above this level. The amount of zinc in the range of 0 ~ 40 0mg / kg, earthworm on the role of soil nitrogen mineralization, nitrification and denitrification activity is not affected by the amount of added zinc