呼伦贝尔沙地杨柴人工林更新复壮技术研究

Rejuvenation Technique of Hedysarum mongolicum Plantation in Hulunbeir Sandy Land

以鄂温克旗东苏木沙地13年生人工杨柴林为试验对象,开展了杨柴人工林更新复壮技术研究,结果表明:(1)平茬对杨柴林的复壮效果十分明显,5月份平茬各项调查指标均大于6月份。(2)5种平茬高度(0～5、10、20、30和40cm)处理中以留茬0～5cm时,新枝数、生长高度、生物量等指标最大,且与其他处理有显著差异;(3)平茬带宽对杨柴生长有显著影响,且在一定范围内,随带宽的增大,杨柴生长的高度、株数、生物量等指标明显提高。(4)带状与块状处理对杨柴生长的影响近似,随带宽的变大,两者之间无显著差异。

Taking 13-year-old Hedysarum mongolicum plantation in Dongsumu sandy Land of Erwenke Banner as research object,rejuvenation techniques of Hedysarum mongolicum were conducted.Result shows that:(1)The effect of stubble on Hedysarum mongolica is very obvious.All survey indicators of May are greater than that of June.(2)Among the treatment of five kinds of stumping heights(0-5 cm,10 cm,20 cm,30 cm,40 cm),the growth indicators such as the number of new branches,height,and biomass are the largest while the stubble mulch being 0-5 cm,and there are significant differences with other treatments.(3)Four types of stumping widths(2 m,4 m,6 m,8 m)are processed.The stumping bandwidth has a significant effect on the growth,and with the increase of bandwidth within a certain range;the growth indexes such as height,number of plants and biomass increase obviously.(4)The effect of treatment(strip and mixture by group)on the growth of is similar,and there is no significant difference between the two as the bandwidth increases.