油菜素内酯及配施外源钙对日光温室越冬茬番茄生长、坐果及产量的影响

Effects of Combined Application of Brassinolide and Exogenous Calcium on Growth,Fruit Setting and Yield of Over-winter Tomato in Solar Greenhouse

为检验油菜素内酯(BR)的应用效果,采用大田试验的方法,研究不同浓度BR及其配施外源钙对日光温室越冬茬番茄生长、生理特性变化、坐果及产量的影响。结果表明,在试验浓度范围内,高浓度BR处理对番茄前期株高生长起到一定的抑制作用;适宜浓度的BR处理使株高增加。高浓度BR处理使番茄叶片MDA含量显著增高,且降低可溶性糖含量;适宜浓度的BR处理可降低番茄叶片MDA含量和相对电导率,增加番茄叶片的脯氨酸含量和可溶性糖含量,提高番茄的叶绿素含量。高浓度的BR处理会抑制番茄坐果,降低番茄第1花序的产量;适宜浓度的BR处理可提高番茄各层花序的坐果率,提高番茄产量。BR配施外源钙处理对番茄前期生长、生理指标优化、提高番茄坐果率和产量的加成效应不明显。综上,BR配施外源钙处理的效果不显著,适宜浓度的BR可以单独在日光温室越冬茬番茄生产上应用,以提高番茄的抗逆性和产量。

To test the application effect of brassinolide(BR),a field experiment was conducted,and the effects of different concentrations of BR and exogenous calcium on the growth,physiological characteristics,fruit setting and yield of tomato in solar greenhouse were studied.The results showed that:in the experimental concentration range,high concentration of BR treatment inhibited the growth of tomato plant height in the early stage,while the appropriate concentration of BR treatment increased plant height.High concentration of BR increased MDA content and decreased soluble sugar content in tomato leaves.Appropriate concentration of BR treatment could reduce MDA content and relative electrical conductivity of tomato leaves,increase the proline content and soluble sugar content of tomato leaves,and increase the chlorophyll content of tomato.High concentration of BR could inhibit tomato fruit setting and reduce the yield of the first inflorescence,while the appropriate concentration of BR treatment could increase the fruit setting rate of each layer of inflorescence and the yield of tomato.The additive effect of BR combined with exogenous calcium on tomato growth,physiological indexes,fruit setting rate and yield was not obvious.To sum up,the effect of BR combined with exogenous calcium is not significant,and the appropriate concentration of BR could be used alone in the production of overwintering tomato in solar greenhouse to improve the stress resistance and yield of tomato.