Effect of Calcium Cyanamide on Soil Fungal Community in Successive Tea-Cuttings Nursery

Qinli Qiu, Dongmei Fan, Yinmao Wang, Danyi Huang, Yu Wang, Junhui Ma and Xiaochang Wang
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Qinli Qiu: Tea Research Institute, Zhejiang University, #866 Yuhangtang Road, Hangzhou 310058, China
Dongmei Fan: Tea Research Institute, Zhejiang University, #866 Yuhangtang Road, Hangzhou 310058, China
Yinmao Wang: Tea Research Institute, Zhejiang University, #866 Yuhangtang Road, Hangzhou 310058, China
Danyi Huang: Tea Research Institute, Zhejiang University, #866 Yuhangtang Road, Hangzhou 310058, China
Yu Wang: Tea Research Institute, Zhejiang University, #866 Yuhangtang Road, Hangzhou 310058, China
Junhui Ma: Lishui Agricultural Bureau, Lishui 323000, China
Xiaochang Wang: Tea Research Institute, Zhejiang University, #866 Yuhangtang Road, Hangzhou 310058, China

Agriculture, 2021, vol. 11, issue 8, 1-17

Abstract: The effects of calcium cyanamide on the soil fungal communities in successive tea-cuttings nursery soils were investigated based on Illumina high-throughput sequencing. The field experiment was carried out with three treatments, including control (CK), flooding (F) and calcium cyanamide (CC). The treatment with calcium cyanamide increased pH (~1 unit) and reduced the accumulation of phenols (~50%), available phosphorus (~28%) and exchangeable Al (~90%) significantly, and improved soil quality. The predominant phylum in all treatments was Ascomycota . FUNGuild revealed that the dominant trophic mode was saprotrophy in tea-cuttings nursery soil. Plant pathogens had a low abundance in the calcium cyanamide treatment. Alpha diversity analysis showed lower richness in the calcium cyanamide than the other treatments. Network analysis showed a poorly connected but highly modularized network in the calcium cyanamide treatment, with the crucial OTUs functions related to anti-pathogenicity. The results showed that calcium cyanamide should be recommended for improving long-term tea nurseries by increasing the survival rate of tea seedlings due to increasing soil pH value, reducing aluminum toxicity, decreasing the accumulation of polyphenols, diminishing pathogenic fungi and making the taxa related to anti-pathogenicity occupy a more important niche.

Keywords: calcium cyanamide; successive tea-cuttings nursery; fungal community composition; molecular ecological network; FUNGuild (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2021
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