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<p>Water scarcity is prevalent in many countries and poses severe constraints on the agricultural production. Irrigation with sewage has emerged as an effective solution to mitigate this issue. In order to find the optimal reuse strategy for rural domestic sewage, eight treatments with different gradients were designed for irrigating <i>Zizania aquatica</i>. The results showed that too high concentration of pollutants in the domestic sewage would inhibit microbial activities and adversely affect soil nutrient accumulation, thus suppressing the growth of plants. Therefore, it is not recommended to apply fertilizer to <i>Zizania aquatica</i> when domestic sewage is used as irrigation water, but let the plants absorb the nutrients in sewage. This way not only saves water (60.35&#xa0;L·(cap*d)<sup>−1</sup>) and fertilizer (225 kgN·hm<sup>− 2</sup>) consumption, but also increases the yield of <i>Zizania aquatica</i> by up to 76.34%. This study innovatively proposes a strategy for the reuse of rural domestic sewage, which offers a new perspective for alleviating water shortages and provides practical references for regions worldwide.</p>

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Study on reuse strategy of rural domestic sewage through irrigating Zizania aquatica with different treatment gradients

  • 期刊论文

  • 发表日期：

    2026年7月17日

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  • Jun Wang,
  • Fang Liu,
  • Xiaofei Wu,
  • Feng Shen,
  • Zhiping Huang

摘要

Water scarcity is prevalent in many countries and poses severe constraints on the agricultural production. Irrigation with sewage has emerged as an effective solution to mitigate this issue. In order to find the optimal reuse strategy for rural domestic sewage, eight treatments with different gradients were designed for irrigating Zizania aquatica. The results showed that too high concentration of pollutants in the domestic sewage would inhibit microbial activities and adversely affect soil nutrient accumulation, thus suppressing the growth of plants. Therefore, it is not recommended to apply fertilizer to Zizania aquatica when domestic sewage is used as irrigation water, but let the plants absorb the nutrients in sewage. This way not only saves water (60.35 L·(cap*d)−1) and fertilizer (225 kgN·hm− 2) consumption, but also increases the yield of Zizania aquatica by up to 76.34%. This study innovatively proposes a strategy for the reuse of rural domestic sewage, which offers a new perspective for alleviating water shortages and provides practical references for regions worldwide.