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[Effects of nitrogen additions on soil hydrolase and oxidase activities in Pinus elliottii plantations.]

Authors :
Zhang C
Zou HT
Zhang XY
Kou L
Yang Y
Sun XM
Li SG
Wang HM
Source :
Ying yong sheng tai xue bao = The journal of applied ecology [Ying Yong Sheng Tai Xue Bao] 2016 Nov 18; Vol. 27 (11), pp. 3427-3434.
Publication Year :
2016

Abstract

We evaluated responses of hydrolase and oxidase activities in a subtropical Pinus elliottii plantation through a nitrogen (N) addition field experiment (dosage level: 0, 40, 120 kg N·hm <superscript>-2</superscript> ·a <superscript>-1</superscript> ). The results showed that N additions significantly decreased the carbon, nitrogen and phosphorus related hydrolase and oxidase activities. The activities of β-1,4-glucosidase (BG), cellobiohydrolase (CBH), β-1,4-N-acetylglucosaminidase (NAG) and peroxidase (PER) activities were decreased by 16.5%-51.1% due to N additions, and the decrease was more remarkable in the higher N addition treatment. The activities of α-1,4-glucosidase (aG), β-1,4-xylosidase (BX), acid phosphatase (AP) and phenol oxidase (PPO) were decreased by 14.5%-38.6% by N additions, however, there was no significant difference among the different N addition treatments. Soil enzyme activities varied obviously in different seasons. The activities of BG, NAG, BX, CBH, AP and PPO were in the order of March > June > October, and aG and PER activities were in the order of October > March > June. Most of the soil hydrolase and oxidase activities were positively correlated with soil pH, but negatively with NO <subscript>3</subscript> <superscript>-</superscript> -N content. It indicated that N additions inhibited soil hydrolase and oxidase activities by reducing soil pH and increasing soil nitrification. N additions inhibited the soil organic matter mineralization and turnover in the subtropical area, and the effects were obvious with the increasing dosage of N additions.

Details

Language :
Chinese
ISSN :
1001-9332
Volume :
27
Issue :
11
Database :
MEDLINE
Journal :
Ying yong sheng tai xue bao = The journal of applied ecology
Publication Type :
Academic Journal
Accession number :
29696838
Full Text :
https://doi.org/10.13287/j.1001-9332.201611.016