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长白松引种调查报告 总被引:2,自引:0,他引:2
河北省山地树种单纯 ,作为用材和公益林的针叶树尤显贫乏 ,致使人工林组成不合理、林地生产力不高 ,社会生态效益难以充分发挥。要扭转这一局面 ,根本办法是进行乔灌木的树种改良 ,引种驯化则是重要途径之一。为此 ,我们从 2 0世纪 80年代开始 ,相继引进一批针叶树和治沙灌木 ,其中 ,长白松引种已达 1 7年 ,完成了种子繁殖、扦插育苗、荒山造林及开花结实的生长发育周期。1 产地与引种地的自然条件长白松 (美人松、长白赤松 )学名 P.sylvestriformis,产于吉林省长白山北坡海拔80 0~ 1 6 0 0 m山地 ,乔木 ,树高达 30 m,树干通直 ,光滑 ,树… 相似文献
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通过对大兴安岭林区引种西伯利亚红松的必要性和可行性的探讨以及对满归和塔河两个林业局西伯利亚红松引种实验生长数据的调查分析,推断西伯利亚红松确实是一个耐严寒、耐贫瘠的优良品种,在大兴安岭林区不仅能够成活,而且生长良好,引种前景十分广阔。 相似文献
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通过对大兴安岭林区引种西伯利亚红松的必要性和可行性的探讨以及对满归和塔河两个林业局西伯利亚红松引种实验生长数据的调查分析,推断西伯利亚红松确实是一个耐严寒、耐贫瘠的优良品种,在大兴安岭林区不仅能够成活,而且生长良好,引种前景十分厂阔。 相似文献
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樟子松在我省发展较快,已成为重要的造林绿化树种之一。长白松俗称美人松,仅见于长白山二道白河及和龙境内中部山脊上有零星小片天然林。长白松外形挺拔秀丽、娇娆多姿,是我省很有希望的造林绿化树种,应当有计划的进行扩大引种试验。因此,本文就两个树种的苗期生长特性及有关问题,做一初步的分析研究。 相似文献
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针对黑龙江省西部半干旱地区农防林树种较为单一的问题,从20世纪60年代开始按照气候相似论及品种同源性理论先后从国内外引进常绿针叶树品种17个,历经40余a定点试验,从生长发育、抗逆性及适宜性等方面进行了长期观测。结果表明:国外引进的10个品种先后3次在6个地点试验,因不能适应该区严寒、干旱的气候条件而在苗期即被淘汰。国内的7个品种中东宁赤松、长白松、兴凯湖松、红松在该区从播种育苗到试验造林获得成功。从生长特性看,其生长速度为兴凯湖松>樟子松≥红松>长白松>东宁赤松;抗逆性上,东宁赤松最弱,其余3个品种与樟子松稍有差异;从生长特性及树种特性上看,兴凯湖松、长白松较适宜作为农防林树种,红松作为农防林则还需进一步驯化。 相似文献
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lntroductionAtmosphericconcentrationofCo2isrisingdra-maticaIIyandadoubIingofthepresentconcentrationwouIdoccurinmidnextcentury,duetoburnoffossilfuelanddestroyofforest(Gates1983,Tauszetal.1996).EIevatedatmosphericCO2willchangeitsgradientdistributioninforestecoboundary,andwillproduceagreateffectontreesandthewholeforestecosystem.Atpresent,studiesoneffectsofelevatedCozonplantshavebeenapopuIartopic,especiallyoncropsrice(BateretaI.199o).HaveIkaetal.(1984)hasgainedmanyachievementsonsoybean.How-e… 相似文献
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One-year-old seedlings of Pinus koraiensis, Pinus sylvestriformis, Phellodendron amurense were grown in open-top chambers (OTCs) with 700 and 500 mmol/mol CO2 concentrations, control chamber and on open site (ambient CO2, about 350 mmol/mol CO2) respectively at the Open Research Station of Changbai Mountain Forest Ecosystems, Chinese Academy of Sciences, and the growth course responses of three species to elevated CO2 and temperature during one growing season was studied from May to Oct. 1999. The results showed that increase in CO2 concentration enhanced the growth of seedlings and the effect of 700 mmol/mol CO2 was more remarkable than 500 mmol/mol CO2 on seedling growth. Under the condition of doubly elevated CO2 concentration, the biomass increased by 38% in average for coniferous seedlings and 60% for broad-leaved seedlings. With continuous treatment of high CO2 concentration, the monthly-accumulated biomass of shade-tolerant Pinus koraiensis seedlings was bigger in July than in August and September, while those of Pinus sylvestriformis and Phellodendron amurense seedlings showed an increase in July and August, or did not decrese until September. During the hot August, high CO2 concentration enhanced the growth of Pinus koraiensis seedlings by increasing temperature, but it did not show dominance in other two species. 相似文献
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天然长白松干形的研究 总被引:3,自引:0,他引:3
长白松是我国特有的松科松属植物,仅见于长白山海拔630~1 400 m之间,因其特殊的分类地位和优良的遗传性而受到普遍关注。本文对第一代天然长白松林的干形进行了分析研究,结果表明:正形数的变动系数最小,相对比较稳定;从正形率系列看,q0.7以下的变动系数均小于10%,随着直径上移,变动系数增大;形数随形率增大而增加,且相关关系紧密;利用样条函数理论,拟合出长白松干形曲线的样条函数方程组,利用计算机程序可容易地计算出立木材积,与实测值相比较80%样木的误差小于3%,精度较高。海拔700 m处的长白松立木干形优于海拔1 100 m处的干形,尖削度小,干形圆满,出材率高。 相似文献
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Effect of elevated ambient CO2 concentration on water use efficiency of Pinus sylvestriformis 总被引:1,自引:0,他引:1
IntroductionEvidencefrommanystudiesshowsthattheconcentrationofatmosphericCO,isdramaticallyraisingandadoubIingofthepresentCO,concentrationwouIdoccurduringthelasthaIfofthenextcentury.Therisingofatmospheric.CO,concentrationisstrongIycorrelatedwiththeincreaseinglobaIconsumptionoffossiIfueIsandaIsoaffectedsignificantIybytheclearingofforest(Bazzaz199o).PfantsgrowingatvariousambientconcentrationofCo,showgreatdifferences,includingtheprocessesofgrowthandphysiology.Photosynthesisandtran-spiration… 相似文献
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Net photosynthetic rates (NPRs) of four species seedlings,Pinus koraiensis, Pinus sylvestriformis, Fraxinus mandshurica andPhellodendron amurense, were measured at different CO2 concentrations and time respectively in Changbai Mountain during the growing season in 1999. The seedlings were cultivated
in open-top chambers (OTCs), located outdoors and exposed to natural sunlight. The experimental objects were divided into
four groups by tree species. CO2 concentrations in chambers were kept at 500 μL·L−1 and 700 μL·L−1 and contrast chamber and contrast field were set. The results showed that the effects of elevated CO2 on NPR of the trees strongly depended on tree species and time. NPRs ofPinus koreainsis andPinus sylvestriformis seedlings increased with the rising of CO2 concentration, while that ofPhellodendron amurense andFraxinus mandshurica increased at some time and decreased at another time.
This project was supported by Chinese Academy of Sciences
Responsible editor: Chai Ruihai 相似文献