单株留芽量及结果母枝剪留长度对猕猴桃结果性能的影响

对栽植株行距3m×4m的美味猕猴桃秦美品种连续进行了3年试验,单株分别剪留250、300、350、400个芽处理后,平均单株新梢数、叶面积指数、落叶率与留芽数量呈正相关,叶幕下层的光强度、净光合率与留芽数量呈负相关;单株果枝数、果实数及单位面积产量均以留400芽处理最高,但平均单果重最小,88g以上的优质果产量最低。综合评价以单株剪留350个有效芽的效果最佳,优级果产量达到2102.7kg/666.7m2。结果母枝分别剪留7、12、17个有效芽处理后,平均每母枝的结果枝数、果实数、产量与留芽数量呈正相关,均以17芽处理最高,分别达到9.5个、30.4个和3.09kg,各处理间的单果重差异不显著。

Effect of Bud Number Per Vine and Cane Length on Characters of Fruiting and Leaf Canopy in Kiwifruit

Experiment on bud number per vine and cane length of kiwifruit plants(Actinidia deliciosa C.F.Liang et A.R.Fer-guson.cv.Qinmei)was conducted for3years continually.At a spacing of3m×4m,vines were pruned to leave250,300,350and400buds per vine respectively,shoot number,leaf index and leaf falling percentage were positively correlated,PFD and Pn under canopy were negatively correlated with bud number per vine.Treatment of400buds was highest in fruiting shoots,fruit number and yield per unit area,but was lowest in average fruit weight and yield of fruit with weight of over88g.Treatment of350buds,with yield of fruit with weight over88g.being2102.7kg /666.7m 2 ,was significantly better than oth-er treatments.After canes were pruned to leave7,12and17buds respectively,the fruiting shoots,fruit number and yield per cane were positively correlated with bud number per cane;the treatment of leaving17buds was the best one,its fruiting shoots,fruit number and production were9.5,30.4and3.09kg respectively.There was no significant difference in average fruit weight among the treatments of bud number left per cane.