环境条件对不同品种小麦缺Mn的影响

Effect of environmental condition on Mn deficiency of different wheat varieties.

在温室和网室中进行盆栽试验 ,研究不同环境条件和杂草对冬小麦缺Mn的影响 ,同时探讨不同小麦品种对缺Mn的耐性 ,发现生长在温室中的小麦其缺Mn症尤为严重 ,而从网室转移到温室的小麦因苗期在网室中受降雨渍水影响吸收了较多Mn2 +,缺Mn症就较轻 ,表明环境因子中降雨是影响小麦Mn营养的一个重要因素 ;供试的 3个品种中 331 7较耐缺Mn ,其Mn的吸收量明显高于敏感品种 .此外 ,试验还发现与小麦伴生的杂草麦麦草对Mn吸收能力强 ,是小麦根际Mn营养的有力争夺者 .

Pot experiments in greenhouse and screen house were conducted to investigate the effect of environmental conditions on Mn deficiency of winter wheat (Tritum aestivum) and the endurance of three wheat varieties to Mn deficiency. It was observed that the wheat grown in greenhouse appeared serious Mn deficient sysmptom, but that transferred from screen house to greenhouse only showed slight Mn deficient symptom, due to its absorbing much Mn 2+ originated from rainfall and waterlogging, indicating that rainfall is one of the important environmental factors affecting the Mn nutrition of wheat. The variety 3317 had a higher endurance of Mn deficiency and could absorb more Mn than the other two varieties. It is also found that Maimai weed had a strong capability of absorbing Mn, which is a major competitor with wheat to the Mn absorption in soil rhizosphere.