外源钙对丝瓜植株形态建成、光合色素、光合能力及根系活力的影响  

Effects of exogenous calcium on plant morphogensis,photosynthetic pigment,photosynthetic capacity and root vitality of Luffa aegyptiaca

作　　者：祝鑫 ZHU Xin(Shangqiu Rural Industry Development Center,Shangqiu 476000,China)

机构地区：[1]商丘市乡村产业发展中心,河南商丘476000

出　　处：《安徽农学通报》2024年第17期30-33,共4页Anhui Agricultural Science Bulletin

基　　金：河南省科技攻关计划项目(212102100273)。

摘　　要：为探究外源钙对丝瓜生长与生理特性的影响机理,探寻适宜丝瓜生长的外源钙浓度,本试验借助无土栽培的方式,设置不同外源钙浓度,研究其对丝瓜植株形态建成、光合色素、光合能力及根系活力的影响。结果表明,适宜浓度的外源钙对丝瓜株高、茎粗、叶面积和根长有正向促进作用,且外源钙浓度在12 mmol/L时最佳,较对照组CK分别增加19.47%、25.15%、19.60%和17.85%,差异均具有统计学意义(P<0.05)。叶片叶绿素含量随着外源钙浓度增加表现出先升高后降低的趋势。外源钙对叶片净光合速率和根系活力的影响均表现出低浓度促进、高浓度抑制的调节特点,且以外源钙浓度12 mmol/L时值相对较大,较对照组分别提高11.22%、19.01%。综合来看,12mmol/L的外源钙浓度有利于丝瓜植株的形态建成、光合能力的增强和根系活力的提升。In order to explore the mechanism of the influence of exogenous calcium on the growth and physiological characteristics of Luffa aegyptiaca and to explore its suitable exogenous calcium concentration,the effects of different concentrations of exogenous calcium on the morphogenesis,photosynthetic pigments,photosynthetic capacity,and root activity of Luffa aegyptiaca were studied using soilless cultivation.The results showed that an appropriate concentration of exogenous calcium had a positive promoting effect on Luffa aegyptiaca height,stem diameter,leaf area,and root length,and the optimal concentration of exogenous calcium was 12 mmol/L,which increased by 19.47%,25.15%,19.60%,and 17.85% compared to the control CK,respectively,and the differences were statistically significant(P<0.05).The chlorophyll content of leaves increased first and then decreased with the increase of exogenous calcium concentration.The characteristics of low concentration promotion and high concentration inhibition were showed by the effect of exogenous calcium on the net photosynthetic rate and root vitality of Luffa aegyptiaca,and the value was relatively high at an exogenous calcium concentration of 12 mmol/L,which was 11.22% and 19.01% higher than the control CK,respectively.An exogenous calcium concentration of 12 mmol/L was beneficial for the morphogenesis,enhanced photosynthetic capacity and root vitality of Luffa aegyptiaca.

关 键 词：外源钙 丝瓜 形态建成 光合色素 光合能力 根系活力 

分 类 号：S642.4[农业科学—蔬菜学]