| Changes of soil moisture and mineral\|nitrogen contents in apple orchards of Loess Plateau under the regulation of different water\|collecting and impermeability techniques |
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| DOI：10.7606/j.issn.1000-7601.2020.03.03 |
| Key Words: apple orchard ridging coated technology artificial seepage control layer soil moisture nitrate nitrogen |
| Author Name | Affiliation | | CHEN Jiayu | Institute of Soil and Water Conservation, Northwest A&F University, Yangling, Shaanxi 712100, China | | XIE Yongsheng | Institute of Soil and Water Conservation, Northwest A&F University, Yangling, Shaanxi 712100, China
Institute of Soil and Water Conservation, Chinese Academy of Science and Ministry of Water Resources, Yangling, Shaanxi 712100, China | | LUO Han | Institute of Soil and Water Conservation, Northwest A&F University, Yangling, Shaanxi 712100, China
Institute of Soil and Water Conservation, Chinese Academy of Science and Ministry of Water Resources, Yangling, Shaanxi 712100, China | | ZHANG Bingxue | Institute of Soil and Water Conservation, Chinese Academy of Science and Ministry of Water Resources, Yangling, Shaanxi 712100, China | | SUO Gaidi | College of Resource and Environment, Anhui Science and Technology University, Chuzhou, Anhui 233100, China | | ZHANG Wenbo | Institute of Soil and Water Conservation, Northwest A&F University, Yangling, Shaanxi 712100, China |
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| Abstract: |
| In the Loess Plateau environment, the changes of soil moisture and mineral\|nitrogen (N) contents under the control of different water\|collecting infiltration impermeability technologies were studied and analyzed for apple trees in apple orchards. Additionally, this research explored the anti\|seepage water accumulation technology suitable for the sustainable development of orchards in dry areas. Through the research, it is summarized that ridging coated treatment (I), seepage control layer (II) and ridging laminating impermeable layer process (III) increased soil moisture in 0~300 cm soil layer and decreased the nitrate content. The best overall effect was with the ridging coated with impervious layer handles (III), which increased soil water content by 9.60%, reduced nitrate N content by 57.15%. In contrast, ridging coated treatment (I) uniformly increased soil water content in 0~200 cm soil layer by 7.73%, even reduced the nitrate content by 60.08%; impervious layer handles (II) increased the soil surface water content of 0 to 40 cm soil layer by 7.37%, reduced nitrate N content in 40~200 cm middle soil by 74.38%. This study showed that different water\|collecting impermeability techniques reduced the leaching of ammonium nitrate by changing the spatial and temporal distribution of water. This improved the utilization efficiency of water and fertilizer. In addition, the treatment of ridging laminating impermeable layer process combined the advantages of two technologies: ridge film mulching and artificial impermeable layer, which effectively regulated soil water movement and reduced nitrate N leaching. This is a feasible technical measure to improve soil water and fertilizer status, increase orchard yield, and make fruit industry sustainable development on the Loess Plateau. |
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