不同地区茶园土壤硝化潜势特征研究

doi:10.13305/j.cnki.jts.2019.06.012

Abstract

Abstract: In order to characterize the nitrification activities of tea plantation soils in different areas, totally 30 typical soil samples from 12 provinces were collected. The soil nitrification potential was determined by using the shaken-soil-slurry method. The multiple regression analysis and partial least squares regression (PLS) were carried out to characterize the main impact factors. The nitrification potential in tea plantation soils ranged from 0.24 to 5.31 mg·kg^-1·h^-1, and the abundance of AOA in soil was significantly higher than that of AOB. Both AOA and AOB showed significantly positive correlation with soil nitrification potential. Abundance of ammonia oxidation microbes, C/N, nitrate, ammonium, total nitrogen and organic carbon contents were the significant important factors influencing nitrification potential, with a descending order of importance according to PLS. These results reveal that nitrification potential is still high in tea plantation soil, since AOA dominate the ammonia oxidation process. The difference of ammonia-oxidizing microorganisms, availability of soil carbon, nitrogen caused by climate, soil conditions and fertilization regimes are likely to be the main factors for the variation of the nitrification potential in tea plantation soils.

Key words: tea plantation soil, nitrification potential, ammonia-oxidizing microorganisms, soil properties

CLC Number:

NIU Siyun, NI Kang, ZHAO Chenguang, MA Lifeng, RUAN Jianyun. Characteristics of Soil Nitrification Potential in Different Tea Gardens of China[J]. Journal of Tea Science, 2019, 39(6): 731-741.

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Characteristics of Soil Nitrification Potential in Different Tea Gardens of China

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