Effects of petroleum spray oils on photosynthetic characteristics of Skaggas Bonnaza navel orange
In order to investigate the effects of petroleum spray oil (PSO) on photosynthetic characters of citrus, five PSOs were sprayed on the leaves of 30-year-old Skaggas Bonnaza navel orange (Citrus sinensis Osbeck) trees. The results showed that, in a certain period of time after spraying, all PSOs decreased leaf net photosynthetic rate, stomatal conductance and transpiration rate, but increased intercellular CO2 concentration rate. However, most photosynthetic characters of Citrole treated leaves were higher than those of control 4 d after spraying. EnSpray treated leaves showed no significant difference. Compared with the control, from the 7 th day after spraying: JieDi treated leaves returned to normal from 25 d after spraying. At the end of this experiment ( 65 d after spraying), the photosynthetic characteristics of leaves treated with Jie Man-ling and Tai-ji were significantly lower than those of control. Both non-stomatal and stomatal behaviors induced by PSO decreased leaf Pn, but non-stomatal behavior was the main reason.
国家科技期刊平台
NSTL
万方数据
维普
