水土保持植物类芦对氮磷钾养分水平的响应
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国家自然科学基金(40801099,40901129)


Effects of nitrogen, phosphorus and potassium levels on the growth of Neyraudia reynaudiana of soil and water conservation plant
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    【目的】探索不同氮磷钾水平对类芦 Neyraudia reynaudiana 生长状况的影响.【方法】采用营养液砂培试验,对优良水土保持植物类芦在不同氮、磷和钾供应水平下的响应规律进行了研究.【结果和结论】0.750 mmol·L-1 的氮和0.030 mmol·L-1 的钾会显著影响类芦生长,降低类芦地上部和地下部生物量;低磷(0.005 mmol·L-1)对类芦地上部生物量无显著影响,但会显著降低地下部生物量;低磷和低钾(0.030 mmol·L-1)对类芦生长的影响显著小于0.750 mmol·L-1 氮水平的影响,在低磷和低钾条件下,类芦根系长度和根表面积显著增加,表现出对低磷和低钾胁迫较强的适应和自我调节能力.用类芦进行植被恢复时,氮素的补充更为重要.

    Abstract:

    【Objective】To explore the effects of nitrogen, phosphorus and potassium levels on the growth of burmareed, Neyraudia reynaudiana .【Method】Nutrient solution-sand culture experiment was applied to study the response of burmareed which was a very excellent soil and water conservation plant at different nitrogen, phosphorus and potassium levels.【Result and conclusion】The results indicated that 0.750 mmol·L-1 N and 0.030 mmol·L-1 K significantly affected the burmareed growth and reduced the aboveground and underground biomass of burmareed. The concentration of 0.005 mmol·L-1 P did not affect the aboveground biomass, but significantly reduced the underground biomass. The effect of 0.750 mmol·L-1 N on the growth of burmareed was significantly stronger than that of 0.030 mmol·L-1 P and 0.030 mmol·L-1 K. In low P and K condition, burmareed could increase root length and surface area, which displayed its strong capacity of adapting and self-adjusting for low P and K stress. Supplement of nitrogen is very important for revegetation with burmareed.

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冯宏,戴军,吴家龙,郭彦彪.水土保持植物类芦对氮磷钾养分水平的响应[J].华南农业大学学报,2015,36(2):31-35

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  • 收稿日期:2014-03-25
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  • 在线发布日期: 2015-02-13