Abstract
Hazelnut is one of the four major nuts in the world and has high nutritional and economic value. This study employed Illumina sequencing of ITS rDNA and 16S rRNA genes to identify the seasonal changes in soil microbial community, the predominant environmental factors driving microbial community composition, and the differences in soil microbial composition among different species of the genus Corylus. We found that the soil microbial community composition of species of Corylus changed significantly with the change in seasons. Corylus heterophylla and Corylus kweichowensis had more ectomycorrhiza in their soil compared to Corylus avellane. The main factor influencing fungal community composition in soil was the available potassium, while that of bacteria was the total phosphorus content. Co-occurrence network analysis revealed that the ratio of positive interaction to negative interaction in soil of C. heterophylla and Ping’ou (C. heterophylla × C. avellane) was higher, while the negative interaction of soil community structure in C. avellane was greater. The bacterial community was more stable than the fungal community according to microbial diversity and co-occurrence network analyses. The findings of this research may facilitate improvements to the production and soil system management in hazel planting processes.
Highlights
IntroductionHazelnut, produced by a shrub or small tree of Corylus Linn
Corylus avellane was introduced in China at the end of the 19th century, and a new hybrid hazel germplasm named Ping’ou which was hybridized by C. heterophylla and C. avellane had the advantages of strong resistance, high yield, and large fruit was obtained in the 1980s [4,5]
C/N in the present study demonstrated that acidic conditions were not conducive to the absorption of water and nutrients for the four species of the genus Corylus
Summary
Hazelnut, produced by a shrub or small tree of Corylus Linn. In the family Betulaceae, is one of the four major dried fruits in the world and was reported to have originated in southwest China in the middle Eocene (~43.6 million years ago) [1,2]. Among Chinese hazel plants, Corylus heterophylla, mainly distributed in northern China, has been developed and utilized, while Corylus kweichowensis, predominantly distributed in southern China, has important potential utilization value [3]. Corylus avellane was introduced in China at the end of the 19th century, and a new hybrid hazel germplasm named Ping’ou which was hybridized by C. heterophylla and C. avellane had the advantages of strong resistance, high yield, and large fruit was obtained in the 1980s [4,5]
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