Effects of Different Pruning Intensities on Growth and Fruiting Characteristics of Corylus heterophylla Fish.× C.avellana L.
Three 5-a Corylus heterophylla Fish.×C.avellana L.:Xinzhen 1 (84-254),Xinzhen 2 (82-11),and Xinzhen 3 (84-310) were selected as the test materials in Urumqi,Xinjiang.The objective of this study was to compare the effects of different pruning intensities (control,light,medium,and heavy) on new branch growth,leaf characteristics,net photosynthetic rates,and fruiting characteristics.The new branch lengths and diameters of different pruning intensities were increased by 183.18％ and 42.05％,respectively,compared with control.With increasing pruning intensity,the leaf areas and chlorophyll SPAD value were increased to different extent.The leaf net photosynthetic rates of light pruning in Xinzhen 3 were significantly improved by 20.40％ compared with control.The fruit setting rates and single-fruit weights of different pruning intensities in Xinzhen 1 and Xinzhen 2 were significantly increased by 19.93％,12.82％ and 14.88％,9.48％,respectively,compared with control.Compared with the control,light pruning in Xinzhen 3 significantly improved the fruit setting rates and single plant yields by 35.46％ and 15.00％,respectively,whilst medium and heavy pruning decreased the fruit numbers and yields per plant by 14.04％ and 23.29％,respectively.Therefore,there were differences in the shortterm response of different C.heterophylla×C.avellana varieties to pruning.Different pruning intensities in Xinzhen 1 and Xinzhen 2 improved the new branch growth,fruit setting rates and single plant yields,but had no significant improvement in yields.Light pruning in Xinzhen 3 significantly improved the photosynthetic capacity,promoted the new branch growth,and increased the fruit setting rates and yields.
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万方数据
维普
