CAJ | 학술논문

秦岭锐齿栎林、油松林和华山松林(包括0～60cm 土层)营养元素总贮量达29.2500～390.1739t.hm-2，其大小为锐齿栎林>华山松> 油松林，土壤中营养现贮量占系统总量的93.10%～99.39%，植被层和凋落物层仅占0.57%～ 3 .00%和0.10%～1.99%；3林分乔木层生物量、木材蓄积量和营养元素积累量平均值分别为 1 20.483t.hm-2、129.384m3.hm-2和1226.9kg.hm-2，锐齿栎林>油松林>华山松林。3林分林下植被层生物量现存量和营养元素积累量平均值分别为1 .553t.hm-2和53.1kg.hm-2，锐齿栎林最大，华山松林最小。林下凋落物现存量和营养元素积累量平均值分别为17.475t.hm-2和502.5kg.hm -2，3林分凋落物现存量、营养元素含量及其积累量都存在明显的差异。锐齿栎林、油松林和华山松林营养元素年吸收量、归还量、存留量和平均归还率分别为334.4、147.2和264 .3，195.5、66.9和84.1，138.8、80.4和180.2kg.hm-2和0.585、0.454 和 0.318， 3林分各营养元素的年吸收量、归还量和存留量也存在一定的差异。锐齿栎林干和皮中Ca和Mg含量远远高于油松林和华山松林的，锐齿栎林多代连作势必导致营养元素的大量流失，特别是Ca和Mg，会破坏土壤原有离子动态平衡，引起林地土壤理化性质改变，林地生产潜力逐渐下降。
진령예치력림、유송림화화산송림(포괄0～60cm 토 층)영양원소총저량체29.2500～390.1739t.hm-2，기대소위예치력림>화산송> 유 송림，토양중영양현저량점계통총량적93.10%～99.39%，식피층화조락물층부점0.57%～ 3 .00%화0.10%～1.99%；3림분교목층생물량、목재축적량화영양원소적루량평균치분별위 1 20.483t.hm-2、129.384m3.hm-2화1226.9kg.hm-2，예 치력림>유송림>화산송림。3림분림하식피층생물량현존량화영양원소적루량평균치분별위1 .553t.hm-2화53.1kg.hm-2，예치력림최대，화산송림최소。림하조 락물현존량화영양원소적루량평균치분별위17.475t.hm-2화502.5kg.hm -2，3림분조락물현존량、영양원소함량급기적루량도존재명현적차이。예치력림、유송 림 화화산송림영양원소년흡수량、귀환량、존류량화평균귀환솔분별위334.4、147.2화264 .3，195.5、66.9화84.1，138.8、80.4화180.2kg.hm-2화0.585、0.454 화 0.318， 3림분각영양원소적년흡수량、귀환량화존류량야존재일정적차이。예치력림간화 피중Ca화Mg함량원원고우유송림화화산송림적，예치력림다대련작세필도치영양원소적대량 류실，특별시Ca화Mg，회파배토양원유리자동태평형，인기임지토양이화성질개변，임지생 산잠력축점하강。
The forest ecosystems of sharptooth oak (Quercus alien a var.acuteserrata Maxim.)，Chinese pine(Pinus tabulaeformis Carr.)and Armand pine(P.armandi Franch) in Mt. Qinling including soil layer 0～60cm contained total nutrient elements 29.2500～390.1739t.hm-2,which put i n ord e r sharptooth oak>Chinese pine>Armand pine stand,with percentage of soil 93.10% ～ 99.39% and of vegetation 0.57%～3.00% and of litter 0.10%～1.99%.The total n utri ent accumulation contents of the ecosystems were Mg>Ca>K>N>P in the sharptooth o ak stand,Ca>N>K>Mg>P in the Chinese pine stand and K>N>P>Ca>Mg in the Armand pin e stand,but which of vegetation and litter were Ca>N>K>Mg>P in the sharptooth oa k stand,N>Ca>K>Mg>P in the Chinese pine stand and N>Ca>K>Mg>P in the Armand pine stand.The average standing crop,average stocked volume and average nutrient acc umulation contents of arbor layers among the three stands were 120.483t.hm 2,129.384m3.hm-2 and 1226.9kg.hm-2 respectively,in which the sharptooth oak stand with higher 60.20%,35.50% and 74.36% respectively th an average was the largest and Armand pine stand was the smallest among the thre e stands.The sharptooth oak stand average production and average volume incremen t were 7.423t.hm-2 and 6.743m3.hm-2,which were higher than a verage 54.20% and 29.58% respectively,among them Armand pine stand was lowest.T he different organs among the three stands have different nutrient percentage co ntents.The nutrient accumulation contents and its' distribution of different o rgans among different stands have marked difference,those in arbor layer put in order barks>stems>roots>branches>leaves to sharptooth oak stand,branches>needles >roots>stems>barks to Chinese pine stand and branches>needles>barks>stems=roots to Armand pine stand;the nutrient accumulation contents of different organs were sharptooth oak>Armand pine>Chinese pine stand in leaves or needles and roots,Ar mand pine>Chi nese pine>sharptooth oak stand to N,P and Mg and contrary to K and Mg in branche s,sharptooth oak>Chinese pine>Armand pine stand to determined elements except to Mg Armand pine>Chinese pine stand in stems,sharptooth oak>Chinese pine or Arman d pine stand to determined elements and Armand pine>Chinese pine stand to N and Ca contrary to P and K similar to Mg in barks;the nutrient accumulation contents of Ca took 50% of the total contents in sharptooth oak stand,but took 24% and 2 8% of those in Chinese pine and Armand pine stand respectively.The average stand ing crop and its nutrient accumulation contents of underplants among three stand s were 1.553t.hm-2and 53.1kg.hm-2respectively,in which sharp tooth oak stand with higher than average 79.65% and 69.49% respectively was the largest and armand pine stan d was the smallest among the stands.The average standing crop and average nutrie nt accumulation contents of litter among the stands were 17.475t.hm-2 a nd 502.5kg.hm-2res pectively,the former put in order Armand pine>Chinese pine>sharptooth oak stand and the latter Chinese pine>Armand pine>sharptooth oak stand,but sharptooth oak> Armand pine>Chinese pine stand according to annual falling litter and sharptooth oak>Chinese pine>Armand pine stand to nutrient percentage contents.The standing accumulation contents of sharptooth oak,Chinese pine and Armand pine stand in s oil layer 0～60cm were 387765.7,27788.0 and 209220.50kg.hm-2respect iv ely,among them have largely difference of different soil layers in the three sta nds.The annual nutrient uptake,return and store of the sharptooth oak,Chinese pi ne and Armand pine stand were 334.4,147.2 and 264.3kg.hm-2,195.5,66.9 and 84.1kg.hm-2 and 138.8,80.4 and 180.2kg.hm-2 respective ly with differe nc e of the determined elements.The total nutrient return rate in the sharptooth oa k, Chinese pine and Armand pine stand was 0.585,0.454 and 0.318 respectively. The nutrient contents of Ca in stems of the sharptooth oak stand was near to 4 and 7times as in stems of the Chinese pine and Armand pine stand r espectively;the nutrient accumulation contents of K,Ca and Mg in barks of the sharptooth oak sta nd was 4 and 4,19 and 14,5 and 5times as in barks of the Chinese pine and Ar mand pine stand respectively,the biomass standing crop and nutrient accumulation contents of stems and barks in the sharptooth oak,Chinese pine and Armand pine stand respectively took 56%,67% and 57%,24% and 53%,28% of the total biomass and accumulation contents of arbor layers,the nutrient loss of the three stands was 1425.6,204.4 and 197.5kg.hm-2respectively because of felling and usin g.The larger proportion of nutrient accumulation contents(especially Ca and Mg)i n stems and barks of sharptooth oak stand lost by felling and using to might be cause leading to the soil acidification and structure destruction and final fert ili ty decline.