| Effect of aerated irrigation on crop growth and soil fertility quality in root zone |
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| DOI：10.7606/j.issn.1000-7601.2020.01.24 |
| Key Words: aerated irrigation hypoxic stress soil fertility in root zone crop growth |
| Author Name | Affiliation | | CAO Xuesong | Institute of Water Resources for Pastoral Area of China Institute of Water Resources and Hydropower Research, Huhhot, Inner Mongolia 010020, China | | LI Heping | Institute of Water Resources for Pastoral Area of China Institute of Water Resources and Hydropower Research, Huhhot, Inner Mongolia 010020, China | | ZHENG Hexiang | Institute of Water Resources for Pastoral Area of China Institute of Water Resources and Hydropower Research, Huhhot, Inner Mongolia 010020, China | | FENG Yayang | Inner Mongolia Agricultural University, Huhhot, Inner Mongolia 010018, China | | CHEN Zhizhong | Yongji Administration Bureau Experimend Station, Linhe, inner Mongolia 015000 | | ZHAO Qinghu | HeBi Hydrology and Water Resources Survey Bureau,HeBi, Henan 458000, China |
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| Abstract: |
| Water, fertilizer, gas, heat and light are the five key factors to ensure the growth and development of crops. The traditional irrigation method not only consumes a lot of water, but also leads to insufficient soil aeration, destruction of the aggregate structure, and the balance between the five elements is broken. Soil degradation, such as soil compaction and salinization, causes soil fertility to decline, which adversely affects crop growth and development. This paper reviews the research background of aerated irrigation, the evaluation index of soil fertility quality under aerated irrigation conditions, the effect of aerated irrigation on soil and soil fertility quality, the effect of aerated irrigation on crop growth, and summarizes the effects of aerated irrigation on soil microenvironment, enzyme environment, nutrition environment and crop root system, and the regulation mechanism of aerated irrigation on soil microenvironment and crop root system. Numerous studies have shown that aerated irrigation can effectively improve the soil structure and hydraulic characteristics of the root zone, enhance the soil permeability of the crop root zone, significantly increase the number of bacteria, fungi and actinomycetes in the root zone of the crop, and increase the hydrogen peroxide in the soil. Enzyme and urease activities improve soil micro\|environment in crop root zone, and aerated irrigation can increase the content of available nitrogen and available phosphorus in soil, improve soil fertility quality, promote nutrient absorption and crop growth and development of roots, and improve irrigation water utilization efficiency, crop yield increased by more than 10%. Finally, it is concluded that there are still problems in the research and development of gas filling equipment, the time and frequency of gas filling, and the influence mechanism of aerated irrigation on soil, microorganisms, crop roots, ecological environment, etc. In the exploration stage of quantitative research, it is necessary to further study the coupling mechanism of water\|soil\|gas\|crop in aerated irrigation, in order to provide theoretical basis for future research. |
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