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- Title
大兴安岭北部不同海拔天然林土壤胞外酶 化学计量特征及其季节动态.
- Authors
及利; 马立新; 程政磊; 祝清超; 张岩; 杨雨春; 杨立学
- Abstract
In this study, we examined the characteristics and influence mechanism of soil extracellular enzyme activity (EEA) and enzymatic stoichiometry in different soils in forests at different altitudes (750-1420 m) in Aokelidui Mountains in the north of the Greater Khingan Mountains. The results showed that altitude, season and their interactions significantly affected the activities of pglucosidase (BG), p-1, 4-N-acetylglucosaminidase (NAG), L-leucine aminopeptidase (LAP), and acid phosphatase (AP). In May, BG and NAG activities gradually increased with increasing altitude, while AP activities increased first and then decreased with increasing altitude. In July, NAG activity increased with altitude, while AP activity increased first and then decreased. In September ,NAG activity changed significantly in different altitudes, with the highest activity at 1420 m (124.22 nmol •h-1 • g-1). With the increases of altitude, ln (BG): ln(NAG+LAP) showed a decreasing trend. Except for the altitude of 830 m, stoichiometric ratio in all altitudes was the highest in July. The ratio of logarithmic conversion of soil C,N, and P invertase activity was 1: 1.25 :0.82. Altitude and soil temperature were the main factors affecting soil extracellular enzyme activities. There was a significant positive correlation between soil temperature and BG,NAG,and AP. Enzymatic stoichiometry ln(BG) :ln(NAG+LAP) and ln(NAG+LAP) :ln(AP) showed significant positive and negative correlations with soil pH,and had a negative and positive relationship with DOC. The ratio of ln(BG) : ln(AP) was greatly affected by soil bulk density.
- Subjects
EXTRACELLULAR enzymes; ACID phosphatase; SOIL density; SOIL temperature; FOREST soils; STOICHIOMETRY; MOUNTAIN soils
- Publication
Chinese Journal of Applied Ecology / Yingyong Shengtai Xuebao, 2020, Vol 31, Issue 8, p2491
- ISSN
1001-9332
- Publication type
Article
- DOI
10.13287/j.1001-9332.202008.005