Effect of bicarbonate and root zone temperature on uptake of Zn, Fe, Mn and Cu by different rice cultivars ( Oryza sativa L.) grown in calcareous soil
Effect of bicarbonate and root zone temperature on uptake of Zn, Fe, Mn and Cu by different rice cultivars ( Oryza sativa L.) grown in calcareous soil
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DOI：
10.1007/978-94-011-1880-4_143
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发表时间：
1993-10
期刊：
影响因子：
4.9
通讯作者：
X. Yang;V. Römheld;H. Marschner
中科院分区：
文献类型：
--
作者：
X. Yang;V. Römheld;H. Marschner
在石灰性土壤（Inceptisol）上进行盆栽试验，以阐明碳酸氢盐（0和20 mM）和根区温度（15°和25°C）对“锌高效”和“锌低效”水稻品种吸收Zn、Fe、Mn和Cu的影响。在25°C下，Biclidine降低了“锌低效”品种地上部锌的浓度和总吸收量，尤其是IR 26，但对锌高效品种没有影响。Bicycline降低了锌低效品种地上部铁的浓度和吸收，特别是IR 26。在15°C和25°C下，在重碳酸盐处理中，锌低效品种和所有品种的Mn浓度和总吸收量较低。然而，在所有品种的浓度和铜的吸收不受碳酸氢根。与25°C根区温度相比，15 °C下锌低效品种地上部Zn和Cu的含量和总吸收量均低于锌高效品种。结果表明，水稻的锌效率与植物对土壤溶液中碳酸氢根浓度升高的高耐受性有关。
Pot experiments were conducted with a calcareous soil (Inceptisol) to elucidate the effects of bicarbonate (0 and 20 mM) and root zone temperature (15° and 25°C) on the uptake of Zn, Fe, Mn and Cu by "Zn-efficient" and "Zn-inefficient" rice cultivars. Bicarbonate decreased concentrations and total uptake of Zn in shoots of "Zn-inefficient" cultivars, especially of IR 26 at 25°C, but not in Zn-efficient cultivars. Bicarbonate decreased concentrations and uptake of Fe in shoots of Zn inefficient cultivars, particularly in IR 26. Concentrations and total uptake of Mn were lower in bicarbonate treatment in the Zn-inefficient cultivars at 15°C, and in all cultivars at 25°C. However, concentration and uptake of Cu were not affected by bicarbonate in all cultivars. Compared to the 25°C root zone temperature, the concentrations and total uptake of both Zn and Cu in shoots at 15°C were lower in Zn-inefficient than in the Zn-efficient cultivars. The results indicate that Zn-efficiency in rice is causally related to high tolerance of plant to elavated bicarbonate concentrations in soil solution.