A study was conducted on Robinia pseudoacacia cl.‘ Zhaiguan’ for its afforestation with truncated and un-truncated stocks,and the stem management measures for its young plantation made by truncated stocks,such as singling of sprouts,removal of lateral buds or pruning at Minquan Forest Farm in He' nan Province.The following results and conclusions were achieved in the study:(1) The appropriate type of planting stock for establishing fastgrow and high yielding R.pseudoacacia cl.‘ Zhaiguan’ plantation is the truncated stock,as compared with the plantation made by un-truncated stocks,the survival rate of plantation made by truncated stock was 9.50％ higher,and the height growth in the current year,the second year and the third year after planting were 13.6％,11.1％ and 11.4％ higher.(2) The mortality for stem of survived trees reached 52.30％ as the plantation made by untruncated stocks.(3) Any stem management measures in grown season of the current year,such as singling of sprouts,removal of lateral buds or cutting short of competitive branches,could reduce the DBH and height growth of R.pseudoacacia cl.‘ Zhaiguan’ in the current year if the plantation is made by truncated stocks,as the growth performance of young plantation appeared no singling of sprouts + no removal of lateral buds ＞ singling of sprouts + no removal of lateral buds ＞ singling of sprouts + removal of lateral buds,but the negative impact on growth would weaken or eliminate in the third years after planting.(4) The maximum DBH and height growth and good stem form of 3-year-old plantation would be gained,when cutting off the competitive branch on top crown of trees in the winter of the current year or early next spring before growing season while no any stem management measures were conducted after planting with the truncated stocks in grown season of the current year.
Robinia pseudoacacia cl.‘Zhaiguan’young plantationtype of planting stockstem management
NETL
NSTL
维普
万方数据
