Effect of long-term tea plantations on spore abundance of AM fungi and its relationship with some physicochemical properties of soil

Document Type : Research

Authors

1 Tea Research Center, Horticultural Science Research Institute, AREEO, Lahijan, Iran

2 Faculty member of Genetics and breeding of tea reasearch institute. lahijan.iran

3 Assistant Professor of Tea Research Center; HSRI; AREEO; Iran.

4 Tea Research Center

10.22092/rhsj.2023.360893.1042

Abstract

Monoculture and unbalanced use of some chemical fertilizers have upset the microbial activity of tea plantations. Change of mycorrhizal fungi status is a good indicator of measuring the sustainability of agricultural management. Thus, this study was carried out to determine the abundance of AMF spores and their relationship with some soil properties of Iranian tea plantation. For this purpose, 155 composite sample of soil was taken of 0-30 cm. Spores of AMF extracted by wet sieving and root colonization was determined by cross-sectional method. Soil properties including pH, soil texture, organic carbon and available potassium were determined.by conventional methods and available phosphorus by Bery-1 method. The results showed that only 66% of soils had AMF spores with an average 9.310-g. The identification of spores revealed that two morphotype Glomus sp was dominant in soil. Soil analysis showed that 37% of soils had pH<4.5. The mean of soils O.C and P content was 2.1%. 54.3 mgkg-1 respectively, so that 46% of soils have very high amounts of Pave and 49% of soils had Kexe <150 mgkg-1. The correlation coefficients showed that only pH and Pava had a positive (r=0.43, p<0.001) and negative (r=-0.54, p<0.001) correlation, respectively with AMF spores.The spore density were very low in studied soil, which indicates negative effect of long-term tea cultivation on the AMF in the rhizosphere. pH and Pava are among the influencing factors in reducing the AMF spore No. Therefore, by recommending the use of P fertilizers based on the soil test, the soil pH correction and application K fertilizers, inoculating tea seedlings with commercial bio-fertilizers of different species, mixed plantation of tea with N-fixing shaded trees such as Albizia and alder is one of the ways of proper management of plant nutrition, improvement of mycorrhizal status of tea seedlings and soil quality.

Keywords

Research in Horticultural Sciences
Volume 2, Issue 2
January 2024
Pages 227-242

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