山区谷子连作障碍机理研究

doi:10.7668/hbnxb.20191551

摘要/Abstract

摘要： 为明确山区谷子规模化种植条件下的连作障碍机理，对具有代表性的河北省丰宁县黄旗镇（春谷区）和临城县西冷水村（夏谷区）连作0~3 a土壤样品的土壤全氮、速效磷、速效钾的含量、土壤pH值、谷子植株相关抗逆酶活性和土壤中微生物群落种类和丰度进行测定和分析，从生理和病理两方面初步揭示了连作障碍机理。结果表明，随着连作年份的增加，土壤全氮持续降低，速效磷和速效钾含量先增高再降低，土壤pH值逐年增高，植株SOD活性持续升高，POD和CAT活性先升高后降低；随着连作年份的增加，土壤微生物群落种类和数量出现一定规律性的变化，放线菌、芽孢杆菌等部分有益菌群丰度逐年降低，黑粉菌等致病菌群丰度逐年升高。

关键词: 谷子, 连作障碍, 基因组测序

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

中图分类号:

S515.01

李琳, 王根平, 师志刚, 张婷, 罗焱杰, 程汝宏, 董立, 高翔. 山区谷子连作障碍机理研究[J]. 华北农学报, 2020, 35(S1): 152-160. doi: 10.7668/hbnxb.20191551.

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.

http://www.hbnxb.net/CN/Y2020/V35/IS1/152

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