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An experiment was conducted to the invasive species Hydrilla verticellata (Hydrilla verticillata) using different levels of dry sheep and cow waste water, as well as NPK fertilizer, to determine the best fertilization method for optimal growth as a future fodder source. Results indicated significant differences between the treatments, with sheep waste at 0.5 g/L showing the best growth—total weight gain of 132.55 g, daily weight gain of 3.31 g, and a weight gain percentage of 163.64%. Comparing with, cow waste at 1.5 g/L yielded lesser results, with total weight gain of 47.77 g and a weight gain percentage of 58.97%. Notably, the use of NPK fertilizer led to plant death due to its adverse effects. Overall, organic fertilizers (sheep and cow waste) outperformed chemical fertilizers, as their slower decomposition promotes sustained plant health. The study recommends using 0.5 g/L of sheep waste for optimal H. verticellata growth, highlighting the favorable Iraqi environmental conditions for year-round production, which can help address feed shortages.

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Evaluating Fertilization Levels to Promote Hydrilla Growth as a Fodder Source in the Tigris River, Iraq

  • 会议论文

  • 发表日期：

    2026年

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  • Harith Nafie Almansour,
  • Nidhal Tahseen Taha Al-Taee

摘要

An experiment was conducted to the invasive species Hydrilla verticellata (Hydrilla verticillata) using different levels of dry sheep and cow waste water, as well as NPK fertilizer, to determine the best fertilization method for optimal growth as a future fodder source. Results indicated significant differences between the treatments, with sheep waste at 0.5 g/L showing the best growth—total weight gain of 132.55 g, daily weight gain of 3.31 g, and a weight gain percentage of 163.64%. Comparing with, cow waste at 1.5 g/L yielded lesser results, with total weight gain of 47.77 g and a weight gain percentage of 58.97%. Notably, the use of NPK fertilizer led to plant death due to its adverse effects. Overall, organic fertilizers (sheep and cow waste) outperformed chemical fertilizers, as their slower decomposition promotes sustained plant health. The study recommends using 0.5 g/L of sheep waste for optimal H. verticellata growth, highlighting the favorable Iraqi environmental conditions for year-round production, which can help address feed shortages.