Phosphorus affects enzymatic activity and chemical properties of cotton soil

Yang Gao, Huiyi Huang, Hongyi Zhao, Houqiang Xia, Miao Sun, Zongyun Li, Pengcheng Li, Cangsong Zheng, Helin Dong and Jingran Liu
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Yang Gao: Jiangsu Key Laboratory of Phylogenomics and Comparative Genomics, School of Life Science, Jiangsu Normal University, Xuzhou, P.R. China
Huiyi Huang: Jiangsu Key Laboratory of Phylogenomics and Comparative Genomics, School of Life Science, Jiangsu Normal University, Xuzhou, P.R. China
Hongyi Zhao: Jiangsu Key Laboratory of Phylogenomics and Comparative Genomics, School of Life Science, Jiangsu Normal University, Xuzhou, P.R. China
Houqiang Xia: Jiangsu Key Laboratory of Phylogenomics and Comparative Genomics, School of Life Science, Jiangsu Normal University, Xuzhou, P.R. China
Miao Sun: State Key Laboratory of Cotton Biology, Institute of Cotton Research of Chinese Academy of Agricultural Sciences, Anyang, Henan, P.R. China
Zongyun Li: Jiangsu Key Laboratory of Phylogenomics and Comparative Genomics, School of Life Science, Jiangsu Normal University, Xuzhou, P.R. China
Pengcheng Li: State Key Laboratory of Cotton Biology, Institute of Cotton Research of Chinese Academy of Agricultural Sciences, Anyang, Henan, P.R. China
Cangsong Zheng: State Key Laboratory of Cotton Biology, Institute of Cotton Research of Chinese Academy of Agricultural Sciences, Anyang, Henan, P.R. China
Helin Dong: State Key Laboratory of Cotton Biology, Institute of Cotton Research of Chinese Academy of Agricultural Sciences, Anyang, Henan, P.R. China
Jingran Liu: Jiangsu Key Laboratory of Phylogenomics and Comparative Genomics, School of Life Science, Jiangsu Normal University, Xuzhou, P.R. China

Plant, Soil and Environment, 2019, vol. 65, issue 7, 361-368

Abstract: Pot experiments were conducted in 2017 with two cotton cultivars (CCRI 79 and LMY 28) and three phosphorus (P) levels: 3, 8 and 12 mg P2O5/kg as P0, P1 and P2, respectively. In this study, the soil water-soluble organic carbon content increased as the soil available P (AP) increased, while there were no significant variations for soil total organic matter content among the three AP levels. The activities of invertase, cellulase and urease in cotton soil decreased significantly in the P0. There were positive correlations between invertase and cellulose activities with soil organic carbon and inorganic-nitrogen (N); these correlated negatively with soil C/N ratio and AP level. In addition, high soil AP can raise soil AP and enhance alkaline phosphatase activity, which had a significant negative relationship with the soil C/P ratio. Urease activity had a significant positive relationship with soil NH4+-N, C/P and N/P, as well as a negative correlation with soil C/N. Moreover, soil NH4+-N and NO3--N in the P1 and P2 were lower than in the P0, which might be an effect of high AP on soil N availability.

Keywords: soil available phosphorus; soil enzymes; C; N and P availability; plant nutrition; fertilization; soil microorganisms (search for similar items in EconPapers)
Date: 2019
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DOI: 10.17221/296/2019-PSE

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