Effects of soil pH value on photosynthetic characteristics of lemon saplings grafted with two rootstocks
In order to explore the physiological adaptability of lemon saplings grafted with different rootstocks to soil pH value environment,using 2-year-old lemon saplings grafted with Poncirus trifoliate Raf and Citrus Junos.ex Tanaka as experimental materials,the diurnal variation of photosynthetic parameters of mature leaves in lemon saplings grafted with two rootstocks under different soil pH value treatments were measured by using LCpro-SD portable photosynthesis system.The results showed that the photosynthetic capacity of lemon saplings grafted with two rootstocks was the strongest in neutral soil environment,and either acid or alkali soil environment could inhibit the photosynthesis of lemon saplings.Through the comprehensive comparison of the maximum net photosynthetic rate,daily average net photosynthetic rate and net photosynthetic rate at each time of lemon saplings grafted with two rootstocks under different soil pH value treatments,it was found that the photosynthetic performance of lemon saplings grafted with Poncirus trifoliate Raf was better than lemon saplings grafted with Citrus Junos.ex Tanaka under different soil pH value treatments,indicating that the lemon saplings grafted with Citrus Junos.ex Tanaka had a wider range of adaptation to soil pH value.
soil pH valuerootstocknet photosynthetic ratestomatal conductancetranspiration rateintercellular CO2 concentration
万方数据
维普
