CAN WATER HYACINTH (EICHHORNIA CRASSIPES) BE CONTROLLED BY REDUCING NITROGEN AND PHOSPHORUS POLLUTION OF WATER BODIES
CAN WATER HYACINTH (EICHHORNIA CRASSIPES) BE CONTROLLED BY REDUCING NITROGEN AND PHOSPHORUS POLLUTION OF WATER BODIES
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DOI：
10.15666/aeer/1403_077091
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发表时间：
2016
影响因子：
0.7
通讯作者：
L. Gao
中科院分区：
文献类型：
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作者：
L. Gao
水体中营养物质浓度的增加被认为是造成普通水葫芦入侵的最重要的外部因素之一。为了检验养分有效性是否限制了该物种的生长和传播，我们利用温室和田间试验研究了水氮(N)和磷(P)浓度对其生长的影响。我们发现，在温室试验中，只有高磷浓度（>1.25 mg l -1）才能显著增加水葫芦的株数和叶片数，氮浓度超过62.5 mg l -1才能显著增加水葫芦的生物量。在大田试验中，水葫芦的无性系生长与水体中氮、磷浓度的关系不大，水体中氮、磷浓度的范围较温室内窄。这表明，通过减少污水排放来控制水葫芦是不切实际的，应该考虑水葫芦无性生长能力的重要性。
Increasing concentration of nutrients in water is regarded as one of the most important external factors responsible for the invasion of the common water hyacinth. In order to test whether nutrient availability limits the growth and spread of this species, we investigated the influence of water nitrogen (N) and phosphorus (P) concentrations on growth using both greenhouse and field experiments. We found that in the greenhouse experiment, only high P concentration (>1.25 mg l -1 ) can significantly increase numbers of ramets and leaves, and N concentration exceeding 62.5 mg l -1 can greatly increase water hyacinth biomass in a tank. In the field experiment, the clonal growth of water hyacinth was not correlated with N and P concentrations in water bodies where the range of N and P concentrations was narrow compared with their range in the greenhouse. This suggests that controlling water hyacinth through minimizing sewage discharging is impractical, the importance of the ability of water hyacinth to grow clonally should be considered.