CAJ | 학술논문

在辽西半干旱地区,以苗圃地播种获得的刺槐1年生幼苗为对象,研究了刺槐实生苗不同留苗密度对苗木质量的影响。结果表明：留苗密度在12万~20万株？hm-2范围内,产出的Ⅰ级苗木的数量最多,达到6万~9万株？hm-2,且Ⅰ和Ⅱ级苗占总留苗株数的百分率达90%以上；留苗密度<12株？hm-2,Ⅰ和Ⅱ级苗占总留苗株数的百分率能够达90%以上,但产出的Ⅰ级苗木的数量减少；留苗密度>20株？hm-2,Ⅰ和Ⅱ级苗占总留苗株数的百分率低于90%,且产出的Ⅰ级苗木的数量减少。
재료서반간한지구,이묘포지파충획득적자괴1년생유묘위대상,연구료자괴실생묘불동류묘밀도대묘목질량적영향。결과표명：류묘밀도재12만~20만주？hm-2범위내,산출적Ⅰ급묘목적수량최다,체도6만~9만주？hm-2,차Ⅰ화Ⅱ급묘점총류묘주수적백분솔체90%이상；류묘밀도<12주？hm-2,Ⅰ화Ⅱ급묘점총류묘주수적백분솔능구체90%이상,단산출적Ⅰ급묘목적수량감소；류묘밀도>20주？hm-2,Ⅰ화Ⅱ급묘점총류묘주수적백분솔저우90%,차산출적Ⅰ급묘목적수량감소。
In the semi-arid areas of western Liaoning Province,taking 1-year-old Robinia pseudoacacia as obj ects, the effects of Robinia pseudoacacia seedlings with different densities on their qualities were studied.Result shows that GradeⅠemerged the largest number (60 000-90 000 ?hm-2 )while the density being 120 000-200 000 trees ? hm-2;seedlings of GradeⅠ and Grade Ⅱ occupied more than 90% of the total seedlings left in the seedbed ;when the densities of seedlings left in the seedbed are less than 1 2 trees ?hm-2 ,seedlings with GradeⅠand GradeⅡoccu-pied above 90% of the total seedlings left in the seedbed,but the number of seedlings with Grade Ⅰ reduced;when density of seedlings left in the seedbed are greater than 20 trees ?hm-2 ,seedlings with GradeⅠand GradeⅡoccupied less than 90% of the total seedlings left in the seedbed,the number of seedlings with GradeⅠreduced.