The Super Trees Characteristics And Seedling Cultivation Of Cary A Dabieshanensisis

Since there are large difference within Carya dabieshanensisis in the natural community,this paper compared the super tree characteristics such as natural community phenology index(germination,flowering,nut enlargement and maturity),growth(nut diameter,nut weight,full grain weight),nut character traits(seed yield,kernel rate,unsaturated fatty acid composition and content),resistance index(resistance,resistant to diseases)The author tried to find out the yield,resistance and stability of the plant in the different site conditions.The paper tested Carya dabieshanensisis peregrination treated by seed increase temperature storage,seed with shell,wrapped by non-woven fabric.The result showed that increasing temperature germination processing,seed with shell,wrapped by non-woven fabric treatment could significantly improve the Carya dabieshanensisis germination.And the ud seedling length.Comparing seed increase temperature germination and with shell and non-woven fabrics,a source effects on germination.The result also showed that the treatment for increased the temperature for seed,without shell and with non-woven fabrics improved germination percentage and the growth for seedlings for Carya dabieshanensisis.Simultaneously,the correlation between geography and the growth for seeding was great.The method for increased the temperature of seeds leaded to early germination at the middle of February,25 days earlier than that of the conventional sowing,which means that the growth period and the growth rate increased by 25 days.On the March 1st,the treatment for picking and seeding while,55.13% of the seeds hadn't sprouted,44.96% of the seeds just sprouted,none of the bud seedlings and mature shoots.Under the sowing condition that sand storage after autumn,33.16% of the seeds hadn't sprouted,62.19% of the seeds just sprouted,3.75% of the seeds were bud seedlings.While under the condition of warming germination,not sprouting seed's ratio was only 12.44%,sprouting seeds was31.31%,and the mature budding seeds up to 52.26%.Obviously,the Carya dabieshanensis with shell could limit its peregrination,and the UN germinated seeds accounted for 81.5%,and the proportion of seed budding percentage,kind seeding and mature bud seeding were11.8%,6.7% and 0,respectively.However,when removing shell push,sprouting is relatively good,the sprouting seeds,seed germination,bud seedling and mature shoots proportion are 12.4%,,30%,5.3% and 52.2%,respectively.The improper way for harvested understory vegetation may lead to water and soil lossand decreased the soil fertility.Studied on combination cultural patterns such as Carya dabieshanensis with shrub(Edgeworthia chrysantha),herb(Polygonatum sibiricum).When forest canopy density reached to 0.6 ~ 0.7,the growth and reproduction of forest micro-environment are extremely suitable for Polygonatum sibiricum,Bletilla striata,Rhizoma Paridis and other Chinese herbal medicines as well.In slow slope plots planted Edgeworthia chrysantha,the bulk soil preparation,planting hole specifications for 0.5 m ×0.5 m × 0.4 m to root extension.The initial density is 450~600 strain /hm2,the forest maintained at 300~450 strains per ha finally.Transplanting stock were planted in two to three years seedlings,the time for spring planting is soil thawing prior to germination.The time for the fall of engraftment is the leaves to soil before freezing.Due to the long duration of Edgeworthia chrysantha,Harvest bud after processing regarded as Chinese herbal medicine sales,autumn harvest cut branches after drying regarded as industrial raw material sales.Recovery principles for mowing partial robust limbs and using leave part of limbs and twigs to cultivate,making plant growth sustainable and promoting the production of sustainability.Meanwhile,300 mu can generate ?105 million`s profits per year.The forest of Carya dabieshanensis vigorous root system can conserve water and soil for medicinal herb sunder forest,such as Edgeworthia chrysantha and Polygonatum sibiricum.The testing areas belongs to water erosion type region in southern hilly area,the soil loss tolerance is 500t/km2·a;according to the prediction,the number of reducing soil erosion was about 389 t/a in testing area;in the winter,Carya dabieshanensis leaves would wither and fall,which can increase the light and the temperature and humidity,provided adequate light and temperature for under story herbs,thus benefiting the growth of Chinese herbal;leaves are also herbal natural organic fertilizer,the carbon sequestration is about8.459kg/m2 totally under the integrated operating model of Carya dabieshanensis forest,and increased by 10.58% compared with the system of natural secondary forest total forest carbon sequestration,the amount of forest total carbon sequestration and biomass,the forest carbon sink,and the regional stability of forest ecosystem are all be improved.