麋鹿放养对天鹅洲草地土壤理化性质的影响

通过2次在天鹅洲麋鹿自然保护区进行土壤采样研究,发现在麋鹿的不同干扰强度下,草地土壤的理化性质有着一定的规律性变化。主要表现为,在冬季,麋鹿干扰使得有机质含量很低的强干扰样地的土壤容重降低,各个层次的土壤容重变化范围在1.27~1.40g/cm³;而在春季,麋鹿活动对土壤容重的影响不明显。在春季,麋鹿活动最为频繁的强干扰样地与其他样地相比植被盖度和地表凋落物量最小,其土壤含水量也最少,各个层次的土壤含水量变化范围在12.83~31.53g/100g干土。除个别层次外,土壤有机质含量在5个不同干扰强度样地之间差异不显著。在冬季,土壤各个层次全氮、全磷、全钾含量在强干扰样地均有升高;而在雨水较多的春季,土壤各个层次全氮、全磷、全钾含量在强干扰样地反而下降。

Effects of elk grazing on soil physical and chemical properties of grassland on Tiane Island

Grassland soil was sampled twice in the Tiane Island Nature Reserve and the physical and chemical properties had changed with different intensities of elk disturbance.In winter,soil bulk density in the heavy disturbance plot was reduced due to its lower organic matter,but in spring,soil bulk densities were not significantly affected by elk disturbance.In spring,soil moisture in the heavy disturbance plot,which had the least vegetation cover and litter layer,was the lowest of the five plots.However,the diffe...