摘要
以泰国空心菜为材料,采用盆栽试验研究了在土壤铬(Ⅲ)胁迫下空心菜生长、生理生化和铬(Ⅲ)吸收量及植物叶片光谱的变化规律,并建立叶片实测元素含量与叶片光谱特征参数之间的拟合关系,通过叶片光谱及其特征参数反演叶片金属元素含量。旨在阐明重金属铬(Ⅲ)对空心菜的毒害作用机理。结果表明,土壤铬(Ⅲ)浓度对泰国空心菜的生长表现为低浓度促进,高浓度抑制,随着土壤铬(III)浓度增大,泰国空心菜叶片含水率、叶片叶绿素a、b和a+b含量整体呈下降趋势;土壤中铬(Ⅲ)浓度在200 mg·kg-1左右对泰国空心菜的生长最有益,达到1500mg·kg-1时的毒害较为明显。
Water spinach, for materials,chromium in soil were studied using pot experiment under(Ⅲ)stress water spinach growth, physiological and biochemical and chromium(Ⅲ)uptake and plant leaves the change rule of the spectrum.And establish the leaf measured element content and leaf spectral fitting relation between the characteristic parameters, By leaf spectrum, and its characteristic parameters inversion metal elements content in leaf. To clarify the toxicity of heavy metal chromium in water convolvulus mechanism. The results showed that soil chromium concentration low concentrations on the growth and concentration high concentrations inhibition growth of water spinach in Thailand in the promotion. As soil chromium(Ⅲ)concentration increased, The water spinach leaf moisture content water spinach leaf chlorophyll a, b, a + b and content of the moisture content is on the decline as a whole. Chromium(Ⅲ) in soil around 200 mg·kg-1 concentration in the most beneficial influence on the growth of Thailand water spinach, up to 1500 mg·kg-1 of poisoning is more obvious.
引文
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