ホテイアオイ(Eichhornia crassipes (Mart.) Solms)の生育及び繁殖に関する研究 : 第2報水中の窒素形態の差異が生育ならびに繁殖に及ぼす影響

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An experiment was designed to study the influence of the sources of nitrogen supplied on the growth. The sources of nitrogen were ammonium (NH_4-N), nitrate (NO_3-N) and the two (NH_4-N+NO_3-N) . 1) Maximum growth of both NH_4-N and NH_4-N+NO_3-N plants occured in neutral or slightly basic water, while the growth of NO_3-N plants were greater in acidic water than those in neutral or slightly basic water. 2) The new plants grew well in the NO_3-N at pH 5 and pH 6, but they reached maximum growth in the NH_4-N+NO_3-N at pH 7 and pH 8. 3) Measurements of the initial and final pH levels of the culture waters indicated that ammonium was absorbed more selectively than nitrate by the plants in the nutrient with NH_4-N+NO_3-N. 4) Both total nitrogen content and total phosphorus content of the NH_4-N plants were higher than those of the plants in NO_3-N, while the calcium content of NH_4-N plants was low.
日本雑草学会の論文
1978-10-25