EFFECTS OF LONG-TERM CROPPING OF TIBETAN BARLEY (KUNLUN 14) ON SOIL MICROBIAL DIVERSITY, ENZYMATIC ACTIVITIES, AND CROP PHENOTYPIC QUALITY
文献类型： 外文期刊
作者： ZHAO, Y. 1 ; YAO, Y. H. 1 ; YAO, X. H. 1 ; WU, K. L. 1 ;
作者机构： 1.Qinghai Univ, Xining 810016, Peoples R China
2.Qinghai Univ, Coll Ecoenvironm Engn, Xining 810016, Peoples R China
3.Qinghai Acad Agr & Forestry Sci, 253 Ningda Rd, Xining 810016, Peoples R China
4.Qinghai Key Lab Hulless Barley Genet & Breeding, Xining 810016, Peoples R China
5.Qinghai Subctr Natl Hulless Barley Improveme, Xining 810016, Peoples R China
关键词： continuous cropping; crop quality; microbial community; nutrient deficiency; soil microbiology
期刊名称：APPLIED ECOLOGY AND ENVIRONMENTAL RESEARCH （ 影响因子：0.816； 五年影响因子：0.896 ）
ISSN： 1589-1623
年卷期： 2022 年 20 卷 3 期
页码：
收录情况： SCI
摘要： There is limited information presenting the effect of long-term continuous cropping of Tibetan barley. The current study applied integrated high throughput sequencing and bioinformatics to determine the effect of long-term continuous cropping of Tibetan barley on the soil microbial, enzymatic characteristics and the plant agronomic traits. Results indicated that Arthrobacter, Sphingomonas, Gaiella, Bacillus, Massilia, Knoellia, Mycobacterium and Pedobacter were the dominant genera. The significant increase of these genera under increased cropping years was an indication of the constant depleted quality of the soil, promoting the survival of these bacterial genera generally associated with bioremediation of degraded soils. The microbial carbon and nitrogen biomass were significantly altered between the difference cropping years. There were statistically significant differences in the enzymatic activities among the cropping years (P < 0.05). Both the soil acid phosphatase enzymatic activity (10 ??mol/day/gram) and sucrase enzymatic activity (80 ??g/day/gram) were both highest after ten years of continuous cropping. The soil urease enzymatic activity was highest (750 ??g/day/gram) at five years of continuous cropping while the soil polyphenol oxidase enzymatic activity was highest (440 ??g/day/gram) at the control treatment. Moreover, there was a steady decline in all the agronomic traits (tillering number, number of kernels per ear, grain weight per plant, weight of a thousand seeds per plant, number of per plant and main ear length per plant) with increase in continuous cropping years, indicating the detrimental impact of long-term continuous cropping on highland barley phenotypic characteristics and yield quantity.
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