生态学杂志2024，Vol.43Issue(9)：2607-2614,8.DOI:10.13292/j.1000-4890.202409.019
不同密度下樟子松非结构性碳水化合物变化规律
Changes of non-structural carbohydrates of Pinus sylvestris var.mongolica under different stand densities
摘要
Abstract
To understand effects of stand density on the allocation of non-structural carbohydrates(NSC)in Pinus sylvestris var.mongolica,we analyzed concentrations of NSC and its components(soluble sugars and starch)in dif-ferent organs of 39-year-old P.sylvestris var.mongolica monoculture with different stand densities(490,750,1110,1550,1800,1930,2560 and 3520 trees·hm-2).The results showed that NSC concentrations in needles,branches and roots ranged from 50.51 to 82.12 mg·g-1,from 58.24 to 76.28 mg·g-1,and from 13.90 to 56.82 mg·g-1,respectively.When stand density increased from 490 to 1550 trees·hm-2,soluble sugars concentration of young needles decreased,starch concentration increased,and NSC concentration remained stable.When stand density increased from 1550 to 3520 trees·hm-2,concentrations of soluble sugars,starch and NSC in young nee-dles showed downward trends.With the increases of stand density,concentrations of soluble sugars,starch and NSC in old needles first increased and then decreased,and concentrations of soluble sugars and NSC in young and old branches exhibited trends of increasing-decreasing-increasing,while concentrations of soluble sugars,starch and NSC in the roots first reduced and then rose.The optimal management density for mature P.sylvestris var.mongolica plantation should be 1110 trees·hm-2,in which concentrations of soluble sugars and NSC in young needles and branches were high and reached the maximum in old needles and branches,indicating more carbohydrate produc-tion and branch growth promotion.关键词
可溶性糖/淀粉/密度调控/碳分配/科尔沁沙地Key words
soluble sugar/starch/density control/carbon allocation/Horqin Sandy Land引用本文复制引用
王凯,邢仕奇,张日升,刘建华..不同密度下樟子松非结构性碳水化合物变化规律[J].生态学杂志,2024,43(9):2607-2614,8.基金项目
国家自然科学基金项目(31400613)和辽宁省教育厅重点攻关项目(LJKZZ20220050)资助. （31400613）
