ABSTRACT

To evaluate the impact of F in soil on seed germination, growth performance and biochemical parameters of Chinese cabbage (Brassica campestris L.) and oilseed rape (Brassica napus L.), a pot experiment was conducted by amending soil with 0, 200, 400, 600, 800 and 1000 mg F kg⁻¹ spiked soil. During aging of exogenous F in soil, an increase in the soil pH and concentrations of all F fractions was noted at elevated F concentrations. Fluorine in the soil was mainly found in the residual fraction (88% and 86%). The results of pot experiment revealed that the percentages of seed germination rate, chlorophylls concentration, and the dry biomass of Chinese cabbage and oilseed rape decreased by 31, 23, 16%, and 24, 38, 31%, respectively, as compared with their respective controls. The free proline concentration increased by 40% for Chinese cabbage and by 151% for oilseed rape. It was observed that F mainly accumulated in the roots of both plants, and the bioaccumulation factor and translocation factor remained <1. This study showed more remarkable effects of F on oilseed rape than those on Chinese cabbage.

摘要

为评价土壤中 F 对大白菜（Brassica campestris L.）和油菜（Brassica napus L.）种子萌发、生长性能和生化指标的影响，采用 0、200、400 改良土壤进行盆栽试验。 , 600, 800 和 1000 mg F kg ^-1尖刺土壤。在土壤中外源 F 的老化过程中，在 F 浓度升高时，注意到土壤 pH 值和所有 F 组分的浓度增加。土壤中的氟主要存在于残留部分（88% 和 86%）中。盆栽试验结果表明，大白菜和油菜的种子发芽率、叶绿素浓度和干生物量的百分比分别下降了31%、23%、16%和24%、38%、31%。相应的控件。大白菜的游离脯氨酸浓度增加了 40%，油菜的游离脯氨酸浓度增加了 151%。观察到F主要在两种植物的根中积累，生物积累因子和易位因子保持<1。这项研究表明，F 对油菜的影响比对大白菜的影响更显着。