铝胁迫下钙对油茶营养元素吸收积累的影响

doi:10.14088/j.cnki.issn0439-8114.2022.22.003

摘要/Abstract

摘要： 为探索钙在铝胁迫下对油茶（Camellia oleifera）营养元素吸收积累的影响,以普通油茶品种湘林XCL 15扦插苗为材料,设置不同浓度钙铝处理的对比试验,测定油茶根、茎和叶片中铝、钙、氮、磷、钾、镁等9种必需的营养元素含量。结果表明,铝胁迫显著提高了油茶各器官铝含量和根系铜含量,抑制了其对钙、氮、镁、锌和钾的吸收积累,与对照处理相比,分别下降了24.05%~54.93%、30.2%~47.0%、34.15%~47.7%、31.48%~55.93%和6.70%~30.05%。铝胁迫下油茶各器官磷含量和茎、叶铁含量无明显变化,但根系铁含量显著下降。外源钙的施入显著降低了油茶铝含量,抑制了对铝的吸收积累。随着外源钙浓度的升高,钙、氮、磷、钾、镁等元素的含量逐渐增加,尤其是在3.0 mmol/L钙处理下效果最显著,而高浓度钙（5.0 mmol/L）则会抑制油茶对氮和锌的积累以及根系铜的积累。综上所述,适量外源钙的施入可以促进油茶对营养元素的吸收积累。

关键词: 油茶（Camellia oleifera）, 铝胁迫, 钙, 营养元素

Abstract: To explore the effect of calcium on nutrient element uptake and accumulation in Camellia oleifera under aluminum stress, a comparative experiment with different concentrations of calcium and aluminum treatments was set up with common Camellia oleifera variety Xianglin XCL 15 cuttings as the material to determine the contents of nine essential nutrients, including aluminum, calcium, nitrogen, phosphorus, potassium and magnesium, in Camellia oleifera roots, stems and leaves. The results showed that aluminum stress significantly increased the aluminum content and root copper content of all organs of Camellia oleifera and inhibited the uptake and accumulation of calcium, nitrogen, magnesium, zinc and potassium, which decreased by 24.05%~54.93%, 30.2%~47.0%, 34.15%~47.7%, 31.48%~55.93% and 6.70%~30.05%, respectively, compared with the control treatment. There was no significant change in phosphorus content and stem and leaf iron content in all organs of Camellia oleifera under aluminum stress, but the root iron content decreased significantly. The application of exogenous calcium significantly reduced the aluminum content of Camellia oleifera and inhibited the accumulation of aluminum uptake. With the increase of exogenous calcium concentration, the contents of calcium, nitrogen, phosphorus, potassium and magnesium gradually increased, especially the most significant effect under 3.0 mmol/L calcium treatment, while the high concentration of calcium （5.0 mmol/L） inhibited the accumulation of nitrogen and zinc and the accumulation of copper in the root system of Camellia oleifera. In conclusion, the application of the moderate amount of exogenous calcium could promote the uptake and accumulation of nutrient elements in Camellia oleifera.

Key words: Camellia oleifera, aluminum stress, calcium, nutrient elements

中图分类号:

S512

黄丽媛, 胡光伟, 王琼, 刘珍. 铝胁迫下钙对油茶营养元素吸收积累的影响[J]. 湖北农业科学, 2022, 61(22): 19-24.

HUANG Li-yuan, HU Guang-wei, WANG Qiong, LIU Zhen. Effect of calcium on nutrient uptake and accumulation in Camellia oleifera under aluminum stress[J]. HUBEI AGRICULTURAL SCIENCES, 2022, 61(22): 19-24.

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