弱光对大樱桃坐果及果实品质的影响

Effects of Low Light Intensity on Sweet Cherry Fruit Setting and Quality

本研究以 7年生露地甜樱桃‘红灯’为试材 ,通过对一定结果量枝条进行遮阳处理 ,研究了不同光照强度 (1 0 0 % ,70 % ,48% ,30 %和 1 1 % )及不同弱光时期 (果实生长 期、 期、 期 )对樱桃坐果及果实品质的影响。结果表明 :与自然光相比 ,1 1 0 0～ 1 50 0μmol.m-2 .s-1 以下弱光处理均显著降低了樱桃坐果率、单果重、果实可溶性固形物含量和果皮花青苷含量。在上述 3个生长时期中 , 期遮荫对果实影响最大 , 期次之 ,

To study the effect of low light intensity on fruit setting and fruit quality, shading treatment was applied on limbs of seven year old sweet cherries ( Prunus avium L.cv. Hongdeng ) by using different materials to reduce light levels to 70% full sun (FS),48%,30% and 11%FS during the whole period of fruit growth. The effect of different shading times was also evaluated by treating limbs with 11%FS during three stages of fruit growth. The following results were obtained: the limbs shading had reduced fruit set, fruit weight, SSC and anthocyanin content in fruit compared fruit on unshaded shoots; The shading during stage Ⅰhad the greatest effect on reducing fruit set and fruit quality, while shading during stage Ⅲ had the least pronounced effect. It was concluded that stage Ⅰis the most sensitive stage of the fruit growth to low light intensity stress.