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- Title
Allelopathic effects of soil pH on nitrogen uptake, its utilization efficiency and soil enzymes in tea bush soil.
- Authors
Ding, L.; Hong, L.; Wang, Y. H.; Wang, Y. C.; Lin, S. X.; Li, M. Z.; Yang, J. B.; Ye, J. H.; Jia, X. L.; Wang, H. B.
- Abstract
We studied the effects of soil pH (3.29, 4.74 and 5.32) on nitrogen uptake and its use efficiency by tea bush. The results showed that with the increase of soil pH value (3.29 ~ 5.32), the nitrogen utilization efficiency of tea bushes increased from 94.28 % to 461.14 %, the nitrogen absorption efficiency increased from 1.05 % to 3.95 % and the nitrogen physiological utilization efficiency increased from 89.79 % to 116.74 %. Besides with the increase of soil pH, the activity of spoil enzymes (Urease, protease, asparaginase, N-acetamide glucose ribosidase) in tea rhizosphere soil was significantly increased, while, that of nitrate reductase and nitrite reductase was decreased significantly. With the increase of soil pH, the expression of nifH gene in tea rhizosphere soil increase significantly, while expression of amoA-AOA, amoA-AOB, nirK, nirS, narG and nosZ gene was decreased. Correlation analysis showed that pH value in tea rhizosphere soil was significantly and positively correlated with nitrogen utilization efficiency, nitrogen uptake efficiency, nitrogen physiological utilization efficiency, urease activity, protease activity, asparaginase activity, N-acetamide glucose ribosidase activity and the expression of nifH gene. Correlation analysis was negatively correlated with nitrate reductase activity, nitrite reductase activity and the expression of amoA-AOA, amoA-AOB, nirK, nirS, narG and nosZ gene. The results indicated that soil acidity significantly affected the ability of soil nitrogen conversion and nitrogen absorption and utilization ability of tea bushes.
- Subjects
ALLELOPATHIC agents; SOIL acidity; NITROGEN in soils; NITROGEN absorption &; adsorption; RHIZOSPHERE
- Publication
Allelopathy Journal, 2022, Vol 56, Issue 2, p181
- ISSN
0971-4693
- Publication type
Article
- DOI
10.26651/allelo.j/2022-56-2-1397