| Cite this article: | 李松旌,樊向阳,崔二苹,等.滴头流量对再生水灌溉作物根区典型微生物群落结构的影响[J].灌溉排水学报,0,():-. |
| lisongjing,fanxiangyang,cuierping,et al.滴头流量对再生水灌溉作物根区典型微生物群落结构的影响[J].灌溉排水学报,0,():-. |
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| DOI： |
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| Effects of Drippers Flow Rates on Typical Microbial Community Structure in Root Zone Soil of Crops Irrigated with Reclaimed Water |
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lisongjing1,2, fanxiangyang1,3,4, cuierping1,3,4, lishengshu1,3,4, huchao1,3,4, cuibingjian1,3,4, liuyuan1,3,4, lizhongyang1,3,4, zhaozhijuan1,3,4
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1.Farmland Irrigation Research Institute, Chinese Academy of Agricultural Sciences;2.Graduate School of Chinese Academy of Agricultural Sciences;3.Key Laboratory of High-efficient and Safe Utilization of Agriculture Water Resources, Chinese Academy of Agricultural Sciences;4.Agricultural Water Soil Environmental Field Research Station of Xinxiang
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| Abstract: |
| As an important part of the soil ecosystem, soil microorganisms play an important role in the formation of soil structure, the circulation of nutrients, the adsorption and degradation of pollutants. Root zone soil is an active interface for material exchange in the soil-plant system, and its nutrient, enzyme activity and microbial community structure directly determine the growth of plants. Different irrigation methods will cause differences in the distribution of soil moisture and soil physical and chemical properties, which may lead to differences in soil microbial structure. However, reclaimed water as a potential source of agricultural irrigation, there are few reports on the structure and function of soil microbial community from the perspective of irrigation rate for different dripper flow rates with reclaimed water irrigation. 【Objective】In order to explore the effects and differences of emitter flow rates on the structure and function of soil typical microbial community in the root zone soil under drip irrigation with reclaimed water. 【Method】The experiment was conducted in the intelligent artificial climate chamber of Xinxiang Agricultural Soil and Water Environment Field Scientific Observation and Experimental Station, Chinese Academy of Agricultural Sciences from November 2019 to January 2020. The pot experiment was carried out to study the effect of microbial community distribution and its influencing factors at different tomato root zone soil layers under drip irrigation (2, 4, 8 L/h) with traditional flood irrigation as the control. After the experiment, microbial community structure indexes of soil samples were determined by 16S rDNA microbial diversity sequencing method.【Result】The study found that the microbial diversity index of each drip irrigation treatment was higher than that of the control flood irrigation treatment, and the difference reached a significant level in the 5～10 cm soil layer (P<0.05). Different treatments had no effect on the dominant flora at the phylum level and genus level, but the relative abundance of the microbial community could be affected by affecting the soil environmental factors in the tomato root zone (such as pH, EC, total phosphorus, etc.). The emitter flow rate of 2 L/h treatment increased the total phosphorus content in the soil layer of 10～15 cm compared with other treatments, thereby significantly increased the relative abundance of Bacteroidetes. Compared with the control group, the drip irrigation treatments increased the pH of soil layer from 10～15 cm, and reduced the relative abundance of Sphingomonas. When the flow rate of the emitter was 2 L/h and in the 0～5 cm soil layer, the abundance of each functional microbial pathway was the highest. 【Conclusion】The results showed that different emitter flow rates under reclaimed water irrigation can change the physical and chemical properties of the soil, thereby changing the soil microbial community structure and distribution characteristics in the root zone of crops, and increasing the abundance of some functional flora. This study indicated that the selection of appropriate drip irrigation rate is of great significance to the regulation of soil microorganisms in reclaimed water irrigation. |
| Key words: reclaimed water irrigation; drip irrigation; flow rates of dripper; root zone soil; microflora |
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