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为了探讨Zn对不同品种油菜光合特性、籽粒Zn含量的影响,采用盆栽试验比较了5种Zn浓度(0、1.0、5.0、10.0、20.0mg/kg)处理下5个油菜品种的生长、光合特性、籽粒Zn含量及积累量的差异。结果表明,5个油菜品种的根、茎、叶、籽粒及植株干重、光合特性、Zn含量和积累量在品种之间、Zn处理浓度之间的差异显著,品种与Zn浓度的交互效应也达到显著水平。当Zn≤5.0mg/kg时,Zn增加了净光合速率(Pn)、气孔导度(Gs)以及蒸腾速率(Tr),提高了油菜茎、叶、籽粒及总干重。5个品种的籽粒Zn积累量以及ENW、NTHYC和H33的籽粒Zn含量随Zn浓度先增加,在5.0mg/kgZn时达到最大值,然后下降。ENW的籽粒Zn含量和籽粒Zn积累量在5.0mg/kg和10.0mg/kgZn处理时为5个品种最高或次高,分别为172.34mg/kg和164.10mg/kg、2.932mg/pot和2.575mg/pot。
In order to investigate the effect of Zn on photosynthetic characteristics and Zn content in different varieties of rapeseed, the pot experiment was conducted to compare the growth and photosynthetic characteristics of five rapeseed cultivars with five Zn concentrations (0, 1.0, 5.0, 10.0 and 20.0 mg / kg) , Zn content and accumulation of grain differences. The results showed that the root, stem, leaf, grain weight and dry weight, photosynthetic characteristics, Zn content and accumulation of five rape cultivars were significantly different among cultivars and Zn treatments, Reached a significant level. When Zn≤5.0mg / kg, Zn increased the net photosynthetic rate (Pn), stomatal conductance (Gs) and transpiration rate (Tr), and increased the stem, leaf, grain and total dry weight of rapeseed. The Zn accumulation of five cultivars and the Zn concentration of ENW, NTHYC and H33 increased first with Zn concentration and reached the maximum at 5.0 mg / kg Zn and then decreased. The highest Zn level and the Zn accumulation level of ENW were the highest or the second highest level of 5 cultivars at 5.0mg / kg and 10.0mg / kg Zn treatments, which were 172.34mg / kg and 164.10mg / kg, 2.932mg / pot and 2.575mg / pot.