Stabilization of oxidative enzymes in desert soil may limit organic matter accumulation
Stabilization of oxidative enzymes in desert soil may limit organic matter accumulation
复制标题
DOI：
10.1016/j.soilbio.2007.09.002
复制
发表时间：
2008-02
影响因子：
9.7
通讯作者：
Martina Štursová;R. Sinsabaugh
中科院分区：
文献类型：
--
作者：
Martina Štursová;R. Sinsabaugh
在美国新墨西哥州中部的Sevilleta长期生态研究基地，荒漠草原土壤中的酚氧化酶和过氧化物酶活性远高于温带土壤。与水解酶活性不同，活性均匀分布在> 1 mm至<38μm的颗粒中，不受高压灭菌的影响。吸附的酶很容易提取，并通过煮沸灭活。高土壤pH值，高稳定的氧化酶活性和碳酸盐为苯酚的降解创造了最佳条件，增加了分解潜力，限制了土壤有机质的积累。
Phenol oxidase and peroxidase activities in desert grassland soils at the Sevilleta Long Term Ecological Research site in central New Mexico (USA) are far greater than those of temperate soils. Activity is uniformly distributed across particles ranging from >1mm to <38μm and is unaffected by autoclaving, in contrast to hydrolase activities. The sorbed enzymes are readily extractable and inactivated by boiling. High soil pH, high stabilized oxidative enzyme activity, and carbonates create optimal conditions for degradation of phenols which increase decomposition potentials and limit soil organic matter accumulation.