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首页> 外文期刊>Soil Research >Proton release from tea plant (Camellia sinensis L.) roots induced by Al(III) under hydroponic conditions.
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Proton release from tea plant (Camellia sinensis L.) roots induced by Al(III) under hydroponic conditions.

机译：水培条件下Al（III）诱导的茶树（Camellia sinensis L.）根系质子释放

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摘要

The mechanisms for soil acidification induced by tea plant growth are not well understood. Proton release from tea plant (Camellia sinensis L.) roots induced by aluminium (Al(III)) in solution-culture experiments was examined with an automatic titration system, to determine the effect of Al(III) uptake by the plants on soil acidification. Results indicated that the uptake of Al(III) by tea plants led to proton release from their roots and thus an increase in soil acidification. The uptake of Al(III) by tea plants and the amount of protons released from the roots were greater at pH 4.5 than at pH 5.0 and 4.0 and increased with increasing initial Al(III) concentration in the culture solutions. With the same initial pH, the amount of protons released from tea plant roots at a constant pH was much higher than that at non-constant pH. The presence of ammonium increased the amount of protons released from tea plant roots. Therefore, the uptake of Al by tea plants and subsequent release of protons from their roots may be an important mechanism by which they acidify soils in tea gardens.
机译：茶树生长引起的土壤酸化的机制尚不清楚。用自动滴定系统检查了溶液培养中铝（Al（III））诱导的茶树（Camellia sinensis L.）根系中质子的释放，以确定植物吸收Al（III）对土壤酸化的影响。结果表明，茶树对Al（III）的吸收导致质子从根部释放出来，从而增加了土壤酸化程度。在pH 4.5时，茶树对Al（III）的吸收和从根部释放的质子的量比在pH 5.0和4.0时更大，并且随着培养液中初始Al（III）浓度的增加而增加。在相同的初始pH值下，在恒定pH值下从茶树根部释放的质子数量要远远高于非恒定pH值。铵的存在增加了从茶树根中释放的质子的量。因此，茶树对铝的吸收和质子从其根部的释放可能是它们酸化茶园土壤的重要机制。

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