Research on the Mechanism of Continuous Cropping Obstacle of Millet in the Mountains

doi:10.7668/hbnxb.20191551

Abstract

Abstract: In order to clarify the continuous cropping barrier mechanism under the condition of large-scale cropping of millet in mountainous areas,representative soil samples were collected from 0-3 years of continuous cropping in Huangqi of Fengning County and Xichengshui of Lincheng County.Through the determination and analysis of the content of total nitrogen,available phosphorus and available potassium,soil pH value,stress-resistance activity of millet plants,and microbial community species and abundance in the soil,the mechanism of continuous cropping obstacle was preliminarily revealed from the physiological and pathological aspects.The results showed that with the increase of continuous cropping years,soil total nitrogen continued to decrease,the content of available phosphorus and available potassium first increased and then decreased,the soil pH value increased year by year,the activity of SOD continued to increase,and the activity of POD and CAT first increased and then decreased.With the increase of continuous cropping years,the species and quantity of soil microbial community changed regularly,the abundance of some beneficial bacteria such as Actinobacteria and Gemmatimonadetes decreased year by year,and the abundance of pathogenic bacteria such as Ustilaginomycetes increased year by year.

Key words: Millet, Continuous cropping obstacle, Genome sequencing

CLC Number:

S515.01

LI Lin, WANG Genping, SHI Zhigang, ZHANG Ting, LUO Yanjie, CHENG Ruhong, DONG Li, GAO Xiang. Research on the Mechanism of Continuous Cropping Obstacle of Millet in the Mountains[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2020, 35(S1): 152-160. doi: 10.7668/hbnxb.20191551.

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