Comparative analysis of differences in shapes,crown and yield formation of pear trees under three simplified trellising cultivations
The early crown and yield formation of trees with two simplified trellising methods,including single trunk with single main branch,double trunks with double main branches were investigated and analyzed for many years with the double-armed anterograde tree shape of pear as control.The results showed that compared with the double-armed anterograde tree shape,the trunk thickening of the trees of these two simplified shapes was slower,and the main branch growth was faster,and the difference from that of control was significant or extremely significant.The number of large,medium and small fruiting branches reached peak in the 5th,3rd and 3rd year after planting,respectively,all of which were more than 1 year earlier than that of control.The number of flower buds was higher from the year of planting to the fifth year after planting,and the difference was significant or extremely significant.The cumulative yield per unit area of the trees of two simplified shapes increased by 3,009.93 kg/667 m2 and 2,830.18 kg/667 m2,and the cumulative net income increased by 23,429.44 RMB yuan/667 m2 and 21,991.44 RMB yuan/667 m2,respectively,in the 2nd to 6th year after planting.The effect of accelerating crown formation,and shortening the time of entering the peak production cycle and recovering the cost of garden construction was significant.
peartrellising cultivationsimplified tree shapecrownyield
万方数据
维普
