施氮量对盐角草生长及钠离子累积的影响

为了研究施氮对盐角草生长及其钠离子累积的影响,本研究通过5个氮肥水平大田小区试验分析了不同施氮量对盐角草生长和钠离子累积的影响.结果表明:施氮能够显著增加盐角草茎秆、籽粒和同化枝的产量;在0 ～ 600 kg/hm2范围内,盐角草的生物量及籽粒产量随着施氮量增加而呈现直线增长的趋势.施氮对盐角草茎秆、籽粒和同化枝中的Na+含量无显著影响,但盐角草同化枝中的Na+含量显著高于茎秆和籽粒.施氮能够促进盐角草各部分对Na+的累积,600 kg/hm2的施氮量条件下,盐角草的Na+累积量平均达到了9668 kg/hm2,较不施氮的2045 kg/hm2增加了370％.因此,本研究表明,施氮能够促进盐角草对盐渍土的改良效果.

The impacts of N rates on the growth and Na+ accumulation of Salicornia europaea L.

ln order to research the effects of fertilization on Na⁺ accumulation and growth of Salicornia europaea L., field experiments were conducted to study the effeets of nitrogen levels on the growth, accumulative amounts of Na⁺ Salicornia europaea L.The results indicated that the yields of grain, stem, and assimilation shoot increased with N fertil-izer application. The relationship between grain biomass, assimilation shoot yield, and the N application rate was in rec-tilinear correlation. With increasing nitrogen application, the concentration trend of Na⁺ was not significantly changed. The concentration of Na⁺ in assimilation shoot was significantly higher than that in grain and stem. The accumulative amounts of Na⁺ in Salicornia europaea L increased with N fertilizer application. Among different nitrogen treatments, the highest Na⁺ accumulative by Salicornia europaea L.was N600(9668 kg/hm²), which was 4.7 times of CK(2045 kg/hm²). Under the conditions of this experiment, fertilization could stimulate Salicornia europaea L. growth and strengthen the effectiveness of bio-remediation of saline soil.