摘要
相同立地和伐前林分、年龄相近的天然阔叶林与人工杉木林对比评价结果表明 :天然阔叶林地上部分有效持水量和 0cm～ 4 0cm土壤蓄水量均大于人工杉木林 ;天然阔叶林 0cm～ 2 0cm土壤有机质含量高于人工杉木林 ;全氮、全磷含量高于人工杉木林 。
Thefunctionandroleofnaturalbroad_leavedforest (NBF)inthemid_subtropical zonehasnotbeenrealizedclearlyforlongtime,whichleadtocutbroad_leavedandplant coniferousforestinlargeareas.ThemanagementofNBFisextensivelyandcarelessly ,and theNBFisdestroyedseriously .ItisweakforNBFmanagementineitherforestrypracticeor scientificresearch .ThevalueofNBFcanbeexpoundedthroughcomparingwithman_made forest.ComparisonbetweenNBFandChinesefirplantation (CFP)inthesamesite,pre_ fellingandage (3～ 1 8years)shows:(1 )Theeffectivewater_holdingaboveground (mainly reflectedinlitter)andwaterstorageby 0～ 40cmsoil(mainlyreflectedin 0～ 2 0cmsoil)of NBFarelargerthanthatofCFP ,thevariationismostremarkable.(2 )Thecontentof organicmaterialin 0～ 2 0cmsoilofNBFislargerthanthatofCFP ,thevariationismost remarkable.Thecontentoftotalnitrogenandphosphorusin 0～ 2 0cmsoilofNBFisalso largerthanthatofCFP ,thevariationisremarkable.(3)Thecontentoforganicmaterialin 2 0～ 40cmsoilofNBFislargerthanthatofCFP ,thevariationisremarkable.(4 )Thesoil charactersofselectioncuttingbroad_leavedforestcanalmostberesumedtothestatebefore selectioncuttingafter 1 7years.Thesoilphysicalandchemicalcharactersoftheforestby artificialmeasurespromotingregeneration (nomatterwhatitisfirstorsecondgeneration) haven’tremarkablevariationwiththatofselectioncuttingbroad_leavedforest.Therefore , thefunctionofNBFinwaterconservationandsoilfertilitymaintenanceisevidentlybetter thanCFP .
出处
《山地学报》
CSCD
2000年第1期69-75,共7页
Mountain Research
基金
福建省自然科学基金!资助项目 (C970 35 )
关键词
福建
天然阔叶林
人工杉林
对比评价
水土保持
naturalbroad_leavedforest,Chinesefir plantation ,waterconservation ,soil fertility
