枣树几种修剪方法的对比研究

试验比较了盛果期灰枣树对不同修剪方法的反应。结果表明,枣树连年修剪,根的数量、冠幅、干周均大于(牙刂)枣处理树。萌发枣头的数量、质量和抽生有效枣拐的数量等也表现出相似的结果。修剪树有效枣股数多于(牙刂)枣树,差异显著;百果鲜重较(牙刂)枣处理多40.1g,单株产量提高15.3%。叶片总糖和全氮测定结果:修剪处理在6月下旬含量较高,此时正值枣吊、枣头生长,花芽分化,开花和幼果发育的关键时期,这对树体的生长发育和产量提高都起到良好的作用;其次,修剪与环切结合的效果优于修剪+(牙刂)枣,但次于修剪处理。

STUDIES ON SEVERAL DIFFERENT PRUNING METHODS OF CHINESE JUJUBE TREE

The experiment has compared the effect of several differen pruning methods of jujube tree. The result shows that years-pruning on jujube tree can increase the number of roots. The crown and the tree-trunk are more spacious than the Yazao treatment. It also indicates that similar result either in the aspact of the quantity and quality or in the number of sprouting effective permanent secondary branch of the new shoots. The number of effective mother fruit branch on pruning trees is more than that on Yazao trees, and has a signcificant difference. Also the 100 fresh fruits are 40.1g more than that on the Yazao trees, and the percentage of the pruning trees has 15.3% more than the Yazao trees. The carbonide and total-N determined by the leaves on bearing base branches indicate that the pruning treatment has higher content in the crucial period of the cell division of young fruit and the farst growth of new shoots (in about the last ten days of June). That will have useful effect on either the tree grouth and fruiting or the output. The combination of pruning and trunk ringing is better than the combining result of pruning and Yazao, but inferior to single pruning treatmant. So it is suggested that the pruning method can be used in the jujube tree culture, and as a transition method it may be very effective for both the tree growth and fruting if the trunk ringing and pruning methods arecombined