کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4381989 1617791 2015 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Soil extracellular enzyme activities are sensitive indicators of detrital inputs and carbon availability
ترجمه فارسی عنوان
فعالیت های آنزیمی خارج سلولی خاک شاخص های حساس ورودی های مضر و کربن هستند
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک بوم شناسی، تکامل، رفتار و سامانه شناسی
چکیده انگلیسی


• Amount of light fraction material was greater in control and litter addition plots.
• In previous years roots and litter removal caused decrease in β-glucosidase activities.
• Phenol oxidase activity were significantly related to the amount of light fraction C.
• β-Glucosidase activity was significantly related to the amount of light fraction C.

In a litter manipulation experiment in a temperate deciduous oak forest in Central Europe, we examined soil carbon contents and density fractions, as well as β-glucosidase and polyphenol oxidase enzyme activities, which play central roles in the degradation of litter and soil organic matter. Our measurements were taken in the DIRT (detritus input and removal treatments) plots, where manipulations include doubling of leaf litter or woody debris inputs, as well as removal of litter, trenching to prevent root inputs, and removal of all litter inputs. After 10 years of manipulation, soil C content did not vary predictably among plots, although the amount of light fraction material was greater in control and litter addition plots compared to litter removal plots. Even after 10 years of litter addition, there were no significant differences in activities of either enzyme in double litter plots compared to control plots, a result consistent with other observed measures of microbial activity. However, removal of roots and litter caused significant decreases in β-glucosidase activities very quickly, and these differences increased over time. However, polyphenol oxidase activities were not significant different among treatments. Enzyme activities were not correlated with total soil carbon contents, but activities of both enzymes were significantly and positively related to the amount of light fraction carbon, suggesting that enzymes respond to increases in labile carbon availability.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Soil Ecology - Volume 92, August 2015, Pages 18–23
نویسندگان
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