东北林业大学学报
東北林業大學學報
동북임업대학학보
JOURNAL OF NORTHEAST FORESTRY UNIVERSITY
2014年
12期
30-36
,共7页
细根根系结构%土壤理化特性%地表层%拟合模型
細根根繫結構%土壤理化特性%地錶層%擬閤模型
세근근계결구%토양이화특성%지표층%의합모형
Fine root structure%Soil physical and chemical properties%Near-surface%Fitting model
以豫南山区20年生的不同林分类型为研究对象，通过野外调查和室内分析，对林地地表层细根结构参数和土壤理化特性指标以及两者之间的关系进行研究。结果表明：麻栎—马尾松混交林土壤全氮质量分数、有效氮质量分数和有机质质量分数均高于麻栎林和马尾松纯林，且主要集中在林地0～10 cm土层中；各根系结构参数值均随土层深度增加而减少；根质量密度最大的林分类型为马尾松纯林，达到2．268 mg· cm－3；各林分类型林地表层的根系以直径在0．3～0．7 mm的细根为主。土壤有机质质量分数和土壤有效氮质量分数均与根质量密度、根长密度、根表面积密度和根体积密度存在显著的相关关系（ P＜0．05）；土壤密度与根系结构参数存在不显著的负相关关系（ P＞0．05）；三次曲线能很好的拟合土壤有效氮质量分数与根长密度、根表面积密度、根体积密度的关系，而对土壤有机质质量分数和根系各参数拟合效果较好的是幂函数或S形曲线。
以豫南山區20年生的不同林分類型為研究對象，通過野外調查和室內分析，對林地地錶層細根結構參數和土壤理化特性指標以及兩者之間的關繫進行研究。結果錶明：痳櫟—馬尾鬆混交林土壤全氮質量分數、有效氮質量分數和有機質質量分數均高于痳櫟林和馬尾鬆純林，且主要集中在林地0～10 cm土層中；各根繫結構參數值均隨土層深度增加而減少；根質量密度最大的林分類型為馬尾鬆純林，達到2．268 mg· cm－3；各林分類型林地錶層的根繫以直徑在0．3～0．7 mm的細根為主。土壤有機質質量分數和土壤有效氮質量分數均與根質量密度、根長密度、根錶麵積密度和根體積密度存在顯著的相關關繫（ P＜0．05）；土壤密度與根繫結構參數存在不顯著的負相關關繫（ P＞0．05）；三次麯線能很好的擬閤土壤有效氮質量分數與根長密度、根錶麵積密度、根體積密度的關繫，而對土壤有機質質量分數和根繫各參數擬閤效果較好的是冪函數或S形麯線。
이예남산구20년생적불동림분류형위연구대상，통과야외조사화실내분석，대임지지표층세근결구삼수화토양이화특성지표이급량자지간적관계진행연구。결과표명：마력—마미송혼교림토양전담질량분수、유효담질량분수화유궤질질량분수균고우마력림화마미송순림，차주요집중재임지0～10 cm토층중；각근계결구삼수치균수토층심도증가이감소；근질량밀도최대적림분류형위마미송순림，체도2．268 mg· cm－3；각림분류형임지표층적근계이직경재0．3～0．7 mm적세근위주。토양유궤질질량분수화토양유효담질량분수균여근질량밀도、근장밀도、근표면적밀도화근체적밀도존재현저적상관관계（ P＜0．05）；토양밀도여근계결구삼수존재불현저적부상관관계（ P＞0．05）；삼차곡선능흔호적의합토양유효담질량분수여근장밀도、근표면적밀도、근체적밀도적관계，이대토양유궤질질량분수화근계각삼수의합효과교호적시멱함수혹S형곡선。
We analyzed data from 20-year different forests types in southern mountains of Henan Province by using sampling and laboratory analysis methods to study the values and relationships between the root structural parameters , and soil physical-chemical characteristics of near-surface.The contents of soil total nitrogen , available nitrogen and organic matter of Quercus acutissima-Pinus mas onina a mixed forest were better than those of Quercus acutissima forest and Pinus massoniana forest, and were mainly distributed in 0-10 cm depth, and all values of root structural indicators decreased with soil depth .The value of root biomass in Quercus acutisis ma-Pinus masos niana mixed forest was 2.268 mg· cm-3 , largest than the other for-est types, and the roots of near-surface were fine roots with the average root diameters of 0.3-0.7 mm.Soil organic matter and soil available nitrogen had significant correlation with root length density , root surface area density and the volume den-sity ( P<0.05) , and soil bulk density had no significant negative correlation with root structure parameters ( P>0.05) , and cubic model could fit the relation of the available nitrogen with soil volume density well , soil root length density and root surface area density , while soil organic matter and root parameters were better fitted with a power function and S-shaped curve.
