嫩枝短截对“西林1号”早实核桃发枝情况的影响

The Influence of the Cutting Back Pruning on the Growth of an Early Fruiting Walnut Variety

研究结果表明：不同短截处理对“西林１号”早实核桃新发枝的长度和粗度有极显著的影响，以２０ｃｍ短截处理效果最好，嫩枝去顶次之。５ｃｍ以下短截处理的新发枝生长量最小，应避免使用。并且母枝留芽数与萌芽率呈极显著的负线性回归关系，与发枝率呈极显著的非线性回归关系。

The ways of different cutting back pruning showed remarkable influences on the growth of new sprout length and thickness.The best way of the pruning is 20cm cutting back,head cutting of the new side shoots is next.The relationship between the number of remaining buds and pullulation rate of the new buds on the initial branch appeared significant negative linearity,the number of remaining buds and the sprouting rate however,showed a significant unlinear regression relationship.The growth of the new sprouts after 5cm cutting back is greatly inhibited,therefore,heavy cutting back pruning in summer should be avoided.