夏季遮荫对猕猴桃生长发育的影响

Effects of Overhead Shading in Summer on Growth and Development of Kiwifruit

以中华猕猴桃翠玉和美味猕猴桃米良一号为试材,研究不同遮荫强度对猕猴桃生长发育的影响。结果表明:适度遮荫具有显著的保叶保果效果,能显著提高猕猴桃当年的果实产量、品质和贮藏性;翠玉的最适遮荫强度在25%左右,米良一号最适遮荫强度为50%左右。过度遮荫会降低果实的内在品质,并使植株翌年萌芽率与花量下降。

In most kiwifruit production areas of China, hot summer conditions frequently result in severe premature fruit drop and leaf fall, decrease of fruit quality and storability, and even death of the whole plant. In this study, field vines of A, chinensis cultivars Cuiyu and A. deliciosa cuhivar Miliang - 1 were subjected to 25%, 50% and 75% overhead shading treatments respectively from early July to late September, with un - shaded vines as the control. Result showed that： moderate shading markedly reduced leaf fall and fruit drop, improved yield and fruit quality, and extended fruit storage life. The suitable level of shading was about 25% for Cuiyu; and 50% for Miliang- 1, However, excessive shading markedly decreased internal quality, and reduced budburst and flower number in the following year. The results indicated that overhead shading in summer could effectively overcome the harm caused by high temperature conditions in kiwifruit, but excessive shading should be avoided.