【摘要】 在科尔沁沙地南缘的章古台沙地,选择轻度染病的樟子松中龄林为对象,进行4种方式的林分结构调整试验。结果表明:结构调整促进了林分生长,控制了松枯梢病的发展,改善了林下植被状况和林分土壤水分状况,缓解了林分在干旱期的水分胁迫。综合不同结构调整方式促进樟子松人工林生长和改善林分环境条件的效果:伐3留2、伐4留2方式好于伐2留2、伐3留3方式,生产上可根据现有樟子松人工林的生长状况,结合混交树种特性,采用适宜的调整方式。更多还原

【Abstract】 Experiments of structure adjustment with four modes were conducted by selecting half-matured & mildinfected Pinus sylvestris var.mongolicaplantation on Zhanggutai sandy land of southern of Horqin Sandy land.Result shows that structure-adjustment measures promote growth of stand,restrain development of Sphaerosis sapinea,improve conditions of understory vegetation and conditions of soil moisture for the stand,relieve water stress during the drought season.The measures of cutting three-row leaving two-row and cutting four-row leaving two-row are optimal in promoting the growth of plantation and improving the circumstance condition of the stands than that of cutting two-row leaving two-rowing and cutting three-row leaving three-row.Optimal adjustment methods should be taken according to the growth status of Pinus sylvestris var.mongolicaplantation and the character of mixed tree species.更多还原