【摘要】 以沙田柚成年树为供试材料,在幼果期(4～5月)采用不同浓度对沙田柚树冠叶面进行喷施。试验结果表明,果丰灵可提高沙田柚叶片的光合速率、气孔导度、蒸腾速率及胞间CO2 浓度,改善叶片的气体交换特性;用果丰灵处理能增大沙田柚果实,增加单果重,在一定程度上降低可滴定酸含量,增加可溶性糖和维生素C的含量。因此,适时适量使用果丰灵可改善沙田柚产量性状和品质性状。更多还原

【Abstract】 Three concentrations of Guofengling, a plant growth regulator, were sprayed on the leaves of the adult plants of Citrus grandis variety Shatianyou during young fruit stage to learn the effects of the regulator on the growth of the plant. The results showed the regulator could improve the gas exchange in the leaf by accelerating the net photosynthetic rate (Pn), stomata conductance (Cs), transpiration rate (Tr) and intercellular CO2 concentration (Ci). Therefore, it could increase the size, perfruitweight and the content of soluble sugars and vitamin C of the fruit, and reduce in certain range the content of titrable acidity. As a result, applying the regulator timely and properly would improve the yield and quality of the fruit.更多还原