Study On Establishment And Management Of Chinese Spruce Seed Productions Stands In Qingling Mountains

Shaanxi Xin Qin Lingyun fir forest Jiashan construction and management technology for Seed Research, received the following results:(1) Established the ability of natural regeneration of spruce seed production stands as the best choice garden construction site and their site conditions suitable method of dominant factors.(2)Construction Qin Lingyun fir seed production stands as the most appropriate site conditions:altitude 2000-2200m; mountain bottom, the bottom, gentle slope Department; mountain brown soil, the thickness of 100-200cm; water well, good drainage; aspect North South East West; vegetation to become, over cooked Hua class marked the best site conditions.(3) Qin Lingyun cedar construction and management for Seed series of technical standards:Best Seedling Level:Ages 20 years, the average tree height 4-6m, the average diameter 4-6cm,2.0m above the average crown.Foster good mother tree seedlings main measures:the low elevation (1400-1600m) site training height of 4-6.0m of the site or in the low-altitude seedlings of spruce plantation site, direct selection criteria consistent with seedlings of saplings with migration to high altitude the ball of soil suitable habitat.Best of afforestation measures and standards:selection of appropriate types of site conditions; along with topographic contour lines parallel perpendicular direction, by spacing 4m×6m, the density was 55 plants/acre strip clear standards for irrigation, points like the land, and planted the ball with soil.Qin Lingyun Shan wild tree seed production standards:in mid-September each year, on the selected mother trees spruce seed production were observed for markers on the mother tree bears fruit, in late September or early October, selected machine (sunny, no wind) taken back to the seed, moderate Liangshai cone after the beating, collect seeds, the wind in sand after the election. Artificial fir seedling cultivation Qin Lingyun technical standards and Qin Lingyun fir seedlings Chupu grading standards see Table 5,6. (4) Qin Lingyun Shan bringing the best technical standards for Seed:Standards established by canopy density thinning time; thinning intensity was 50%; spacing from the previous 4m×6m reduced to 6m×8m, density by the required 55/mu, reduced to 25-27 (plants/acre); their stands between canopy density maintained at 0.3-0.6.(5) the use of low-altitude site in spruce seedlings of intensive cultivation, high-altitude construction of technical methods and measures for Seed, more natural fruit age (average 40 years) for nearly 20 years earlier; forest preservation rate than the previous forest Save rate (1960---1990) 36% to 99%, afforestation costs reduced by nearly 80%.This study to address site conditions for afforestation Qin Lingyun Shan selection and evaluation division, and large area technologies and solutions to create a spruce forest ecosystem construction in a similar key issues and laid the scientific foundation and methods.