Genotypic differences in manganese efficiency:: field experiments with winter barley (Hordeum vulgare L.)
Genotypic differences in manganese efficiency:: field experiments with winter barley (Hordeum vulgare L.)
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DOI：
10.1007/s11104-004-5048-9
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发表时间：
2005-05-01
期刊：
影响因子：
4.9
通讯作者：
Husted, S
中科院分区：
文献类型：
--
作者：
Hebbern, CA;Pedas, P;Husted, S
在丹麦北部的一项小区试验中，8个不同的冬小麦品种在此前已证明缺锰的土壤上种植，以评估在两种处理下的田间表现和粮食产量：叶面施锰和不施叶面锰肥。其中两种基因型的锰效率较高，其中一种基因型的锰效率连续三年较低；其他基因型的结果差异很大。以籽粒产量为基础的锰效率与不同营养生长期的全地上部锰浓度、生物量或锰吸收量之间不存在相关性。在末次施锰后7周，叶绿素a荧光分析能够区分两个处理，而锰浓度、地上部生物量和锰积累量则不能区分。对照地块重复叶面喷施不可能完全缓解缺锰。考虑到试验点的生长条件和植物组织中的低锰，有可能是缺锰的程度足够严重，以至于锰的效率机制崩溃。
Eight different winter barley genotypes were grown in a plot experiment in northern Denmark, on soil where Mn deficiency had been previously demonstrated, to assess field performance and grain yield under two treatments: with foliar Mn fertilisation and without foliar Mn fertilisation. A high Mn efficiency was demonstrated for two of the genotypes and a low Mn efficiency was observed for one of the genotypes in three consecutive years; highly variable results were obtained for other genotypes. Mn efficiency based on grain yields could not be related to whole shoot Mn concentration, biomass or Mn uptake at various vegetative growth stages. Chlorophyll a fluorescence analysis was able to differentiate between the two Mn treatments up to 7 weeks after the last Mn application, whereas Mn concentrations, shoot biomass and Mn accumulation could not. It was not possible to fully alleviate Mn deficiency by repeated foliar spraying on the control plots. Given the growing conditions at the trial site and the low Mn in plant tissue, it is possible that Mn deficiency was extreme enough that Mn efficiency mechanisms broke down.