Effects of Water-collecting and Impermeability Measures on Soil Moisture, Nitrate Nitrogen and Fine Roots of Dense Planting Dwarf Rootstock Apple Orchard
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    Abstract:

    In order to improve the utilization efficiency of soil water and fertilizer, the water-collecting and impermeability measures suitable for the development of apple orchards in Weibei area were explored. Through field experiments, the effects of different water-collecting and impermeability measures on soil moisture, nitrate nitrogen and fine roots of dense planting dwarf rootstock apple orchard were analyzed. The results showed that: In the vertical direction, the treatment of seepage control layer, ridging coated, ridging laminating impermeable layer process could effectively increase the soil moisture content, nitrate nitrogen content and fine root length density of 0—40 cm soil layer, and the soil moisture content and fine root length density under the treatment of ridging coated and ridging laminating impermeable layer process were higher than those under the treatment of seepage control layer. The nitrate nitrogen content was lower than that under the treatment of seepage control layer. In the range of 50—100 cm soil layer, three processing measures all reduced soil nitrate nitrogen content, effectively alleviated the leaching accumulation of nitrate nitrogen. In the horizontal direction, the soil water content and root length density in the planting area (under plants and between plants) increased by 15.1%, 5.0%, and the nitrate nitrogen content decreased by 8.6% under the treatment of ridging coated and ridging laminating impermeable layer process. But there was no significant difference between the treatment of seepage control layer and clean tillage. In the fertilization area (midpoints), the three treatments increased the soil moisture content and the density of fine root length, and decreased the soil nitrate nitrogen content. Treatment of ridging laminating impermeable layer process had the best effect, which increased the soil moisture content and the density of fine root length by 48.6%,48.3%, respectively, and reduced the nitrate nitrogen content by 17.4%. Among all the measures, the treatment of ridging laminating impermeable layer process had the best control effect on orchard soil environment and fruit tree root system. The results of this study provided a reference for the application and popularization of the water-collecting and impermeability measures in dense planting dwarf rootstock apple orchard in Weibei area.

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History
  • Received:March 03,2023
  • Revised:
  • Adopted:
  • Online: December 27,2023
  • Published: December 28,2023