秋季叶面喷施尿素对酿酒葡萄光合作用和果实品质的影响

以“赤霞珠”葡萄为试材,在秋季对叶面喷施不同浓度的尿素,研究其对叶片光合作用和果实品质的影响,以期为提高酿酒葡萄叶片的光合作用和果实品质提供理论依据.结果表明:在酿酒葡萄的生长后期,叶面喷施1％～4％的尿素可明显提高葡萄叶片气孔导度和叶绿素含量,提高了叶片中蛋白质含量和光合作用关键酶活性,净光合速率也得到明显的提高.其中,3％尿素处理不但显著提高了叶片光合作用关键酶活性和净光合速率,也显著提高了酿酒葡萄果实的品质.因此,秋季叶面喷施适当浓度的尿素可通过调节气孔导度、叶绿素含量和光合作用关键酶活性来提高叶片光合速率,最终提高果实品质.

Effect of Foliar Application of Urea in Autumn on the Photosynthesis and Berry Quality in Wine Grape

'Cabernet Sauvignon'grape was used as materials to study the effect of the folia application of urea at different concentration in autumn on the photosynthesis and berry quality,provides the theory basis for increase the photosynthesis and the berry quality of wine grape.The results showed that the 1%~4% urea folia application in the mid to late growth period could increase the stomata conductance and the chlorophyll content,increase the leaf protein content and the activities of the key enzymes of photosyn...