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Effects of different fertilizers and urea combined application on nitrogen transformation enzyme activities in tea-garden soil of Chongqing *

Chinese Journal of Applied & Environmental Biology[ISSN:1006-687X/CN:51-1482/Q]

Issue:
2020 06
Page:
1-11
Research Field:
Articles
Publishing date:

Info

Title:
Effects of different fertilizers and urea combined application on nitrogen transformation enzyme activities in tea-garden soil of Chongqing *
Author(s):
YANG Haibin LI Zhonglin DENG Min SHENG Zhonglei ZHANG Ying HU Fangjie WU Xiuhong XU ze**
Tea R esearch Institute of Chongqing Academy of Agricultural Sciences, Yongchuan 402160, China
Keywords:
fertilization regimes urea nitrogen transformation enzyme tea-garden soil
CLC:
-
PACS:
DOI:
10.19675/j.cnki.1006-687x.2019.09010
DocumentCode:

Abstract:
In order to reveal the effects of different fertilizers and urea combined application on nitrogen transformation enzyme activities in tea-garden soil. The locational fertilization tests were conducted to assess the effects of different fertilization regimes on the activities of nitrate reductase, nitrite reductase, urease, N-acetyl-β-D-glucosaminidase and L- leucine aminopeptide in tea-garden soil of Chongqing. The experiment consisted of five different base fertilizer treatments, including the mushroom residue, biological carbon combined with compound fertilizer, organic fertilizer, biochar organic fertilizer and compound fertilizer ( CK), and urea as top dressing fertilizer. Soil was sampled during the spring tea, summer tea, autumn tea and winter tube periods in the tea-garden . The results indicated that soil nitrogen transformation enzyme activities showed obvious dynamics during different periods of tea production. The highest and lowest values of soil nitrate reductase, nitrite reductase, urease and N-acetyl-β-D-glucosaminidase were observed in spring and summer tea periods, respectively. Different fertilizers and urea combined application significantly affected nitrogen transformation enzyme activities. Compared to the CK organic fertilizer and urea combined application had the best effect on the improvement of nitrate reductase activity in spring, summer and autumn tea periods, with an increase of 4.83%, 4.49% and 7.87%, respectively; mushroom residues and urea combined application had the most effect on the improvement of soil nitrite reductase, urease, and N-acetyl-β-D-glucosidase activity, with an increase of 32.48%, 46.43%, and 75.24%, respectively; different base fertilizers and urea combined application inhibited soil L- leucine aminopeptide activity. The redundancy analysis suggested that soil microbial biomass nitrogen was the dominant factor affecting the activities of soil nitrogen transformation enzyme. When urea is applied as fertilizer in tea-gardens in Chongqing, the use of mushroom residues as the base fertilizer is beneficial to maintain soil nitrogen transformation enzyme activity.

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Last Update: 2020-04-28