Seasonal changes in redox properties of peat, nutrition and phenology of Menyanthes trifoliata L. in a floating peat mat in Mizorogaike Pond, central Japan
Seasonal changes in redox properties of peat, nutrition and phenology of Menyanthes trifoliata L. in a floating peat mat in Mizorogaike Pond, central Japan
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DOI：
10.1023/b:aeco.0000035171.00202.5c
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发表时间：
2004-01-01
期刊：
影响因子：
1.8
通讯作者：
Haraguchi, A
中科院分区：
文献类型：
--
作者：
Haraguchi, A
在日本中部Mizorogaike池塘的漂浮泥炭垫中，研究了三叶蔓草（Menyanthes trifoliata L.）的单叶数量、养分吸收率和元素浓度的季节变化，并参考了泥炭的氧化还原电位。三叶草叶片种群在5月迅速增加，6月达到最大值，7月下降至最大密度的12%。三叶草的叶密度再次增加，在9月达到第二次最大值，然后在12月降至零。6 ~ 7月叶密度的减少与地表泥炭氧化还原电位（Eh）的最小值相对应。三叶草根际低Eh与植物6 ~ 7月叶片暂时消失有关。6 ~ 8月，三叶草根系中K、Mg、Ca、Fe等养分含量最低。以三叶草断根铷吸收率评价的三叶草养分吸收率在6月和7月达到最小值。泥炭的氧化还原特性会影响米佐罗盖克塘三叶草根系的养分吸收活性，进而影响其叶片物候。
Seasonal changes in leaf population per area, nutrient absorption rate and elemental concentration of Menyanthes trifoliata L. were studied in a floating peat mat in Mizorogaike Pond, central Japan, with reference to the peat redox potential. Leaf population of M. trifoliata showed a rapid increase in May, reached the maximum in June, and then decreased to 12% of the maximum density in July. The foliage density of M. trifoliata again increased and reached its second maximum in September, and then it decreased to zero in December. The decrease of the foliage density from June to July corresponded to the minimum of redox potential (Eh) of the surface peat. Low Eh in the rhizosphere of M. trifoliata relates to the temporary disappearance of the foliage of the plant from June to July. Nutrient concentration (K, Mg, Ca, Fe) in M. trifoliata roots showed minimum in June to August. The nutrient absorption rate of M. trifoliata evaluated from the rubidium absorption rate of excised root of M. trifoliata showed a minimum value in June and July. Peat redox properties would affect the nutrient absorption activity of the roots and the consequent foliage phenology of M. trifoliata in Mizorogaike Pond.