摘要
以6年生中林1号核桃为试材,进行了春剪、秋剪和冬剪,探讨不同时期修剪对叶片营养元素含量季节变化的影响。结果表明,不同修剪时期,叶片营养元素含量的季节变化趋势相同,N,P,K,Fe,Cu含量季节变化均呈下降趋势,Ca,Mg,Mn含量总的呈上升态势,而Zn含量变化则呈波动状态。无论叶片何种元素含量季节变化,冬剪一般处于最低水平,效果最差;春剪、秋剪效果较好,且二者间不存在显著性差异。
To study the effect of different pruning periods on seasonal changes of nutrient elements contents of walnut leaves,six-year-old walnut trees of the cultivar Zhonglin 1 were pruned at different time. The pruning periods were pruning before defoliation（PBD）, winter pruning（WP）and pruning after germination（PAG）. The results showed that the change tendencies of nutrient elements contents in leaves pruned at different time were the same. Contents of N, P, K, Fe and Cu ascended with the time, contents of Ca, Mg and Mn increased, while the seasonal changes of Zn content fluctuated. The effect of WP was the worst and nutrient elements contents of leaves pruned at winter were the lowest during the seasonal changes. The effects of PBD and PAG were better and had no significant difference between them.
出处
《山西农业科学》
2018年第2期224-227,共4页
Journal of Shanxi Agricultural Sciences
基金
山西省科技攻关项目(20140311017-5)
