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首页> 外文期刊>Soil Science Society of America Journal >Effects of Forest Postharvest Management Practices on Enzyme Activities in Decomposing Litter
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Effects of Forest Postharvest Management Practices on Enzyme Activities in Decomposing Litter

机译：森林采后管理实践对分解垃圾中酶活性的影响

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摘要

Forest harvesting and site preparation alter many features of the soil environment affecting biological activity and litter decomposition. One aspect of biological activity, "lignocellulase" enzyme activity, has been found to be a good predictor of litter mass loss. We determined the effects of postharvest treatments (SLASH, BROADCAST BURN, and CHIP AND PILE treatments with the intact FOREST treatment as a control) on lignocellulose degrading and nutrient releasing enzyme activities (ß-glucosidase, cellobiohydrolase, ß-xylosidase, N-acetyl-glucosaminidase, phenol oxidase, and phosphatase) in decomposing pine litter in litterbags and in the forest floor and compared them with patterns of decomposition. In the forest floor, the SLASH treatment decreased phenol oxidase and phosphatase activities by half; the CHIP AND PILE treatment decreased ß-glucosidase, cellobiohydrolase, phenol oxidase, and phosphatase activities by 50 to 75%; and the BROADCAST BURN treatment decreased N-acetyl-glucosaminidase, phenol oxidase, and phosphatase activities by 30 to 60%. In the litterbag litter, phenol oxidase activity, N-acetyl-glucosaminidase activity, and mass loss were lower in the BROADCAST BURN treatment than in the FOREST treatment. SLASH and CHIP AND PILE treatments did not affect enzyme activities or decomposition of the litterbag litter. The relationship between enzyme activities and incremental mass loss was significant in the FOREST and CHIP AND PILE treatments for ß-glucosidase, cellobiohydrolase, and N-acetyl-glucosaminidase enzymes (r > 0.50, p < 0.05), but not significant in the BROADCAST BURN and SLASH treatments. Although reduced enzyme activities were accompanied by lower decomposition rates, enzyme activities were not always a dominant control of decomposition in certain highly disturbed treatments.
机译：森林采伐和场地整备改变了 土壤环境的许多特征，影响了生物活性和凋落物 分解。已经发现生物学活性的一个方面，“木质纤维素酶” 酶的活性，可以很好地预测凋落物 的质量损失。我们确定了收获后处理 （以 完整森林作为对照的SLASH，BROADCAST BURN和CHIP AND PILE处理）对木质纤维素降解 和分解松树枯枝落叶中养分释放酶的活性（ß-葡萄糖苷酶， 纤维二糖水解酶，ß-木糖苷酶，N-乙酰氨基葡萄糖苷酶， 酚氧化酶和磷酸酶） 放在垃圾袋和林地中，并与 分解模式进行比较。在林地中，SLASH处理 将苯酚氧化酶和磷酸酶活性降低了一半； CHIP AND PILE处理降低了ß-葡萄糖苷酶， 纤维二糖水解酶，苯酚氧化酶和磷酸酶活性 降低50％至75％；而BROADCAST BURN处理可使N-乙酰氨基葡萄糖苷酶， 酚氧化酶和磷酸酶活性降低30％至60％。在 的垃圾袋中，BROADCAST BURN处理 的苯酚氧化酶活性，N-乙酰基-氨基葡萄糖苷酶 活性和质量损失均低于。森林治疗。 SLASH，CHIP AND PILE处理 不会影响酶活性或垃圾袋 的分解。酶活性与增量 质量损失之间的关系在森林和ß-葡糖苷酶，纤维二糖水解酶和N-乙酰氨基葡萄糖苷酶 <的CHIP AND PILE处理 / sup>酶（r> 0.50，p <0.05），但在 BROADCAST BURN和SLASH处理中不显着。尽管降低的酶 活性伴随较低的分解速率，但在某些高度干扰的处理中，酶 活性并不总是控制分解 的主导作用。 >

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  • 来源
    《Soil Science Society of America Journal》 |2003年第4期|1250-1256|共7页
  • 作者

    M. P. Waldrop; J. G. McColl; R. F. Powers;

  • 作者单位

    Dep. of Environmental Science, Policy, and Management, Univ. of California, 151 Hilgard Hall, Berkeley, CA 94720,Current address: School of Natural Resources and Environment, Univ. of Michigan, 430 E. University Ave, Ann Arbor, MI 48109;

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