POPLAR resources and cultivation practices _476

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POPLAR resources and cultivation measures

. Expected 'to 2000 to 1: recoverable stock will reach 490,000 cubic meters. 2 cultivation of poplar clones introduced since 1974,[link widoczny dla zalogowanych], Linkou, spring, Muling, The East is Red, with Ling, Tuen rivers, Weihe, Hailin Bureau and other large areas will be JJ_ l Ji Ling Jiao Li Lin, etc. forest, respectively, from l ☆: Bin, j 』j:,. Rod, If-B and so f r Qin Lou Harrison clones, for the production of Cultivation. Indigo training larger, better-Spring Forest, 1980 ~ i986 create a total of Populus. Yang Xiaoqing about 8,000 hectares. The main way the council is the cultivation of poplar: choose gentle or meadow land, drainage ditch,[link widoczny dla zalogowanych], turning rake 1 to 2 years, 2 times per year, 1 year soybean species, soil aging, the cultivation of poplar, spacing 3 × 3 ~ 6x6 meters, timely weeding, cultivation, pest control, the council also conducted a large ridge of high Mo or cultivated land preparation, growing well. Poplar cultivation by the current status of Spring Board, 15 years old can be produced per hectare of poplar wood i5o cubic meter, per cubic meter price 12o yuan, with an income of 18,000 yuan, expenditures 3ooo yuan, income and expenditure ratio of 6:1. Of the discussions and recommendations, 1, expand the cultivated area of poplar plantation, the growth rate in natural forest, and is not being used in more than flood the land development. If the spine area and the plot of 5 poplar plantation made for Holland, Chan Io ha cubic meter of growth accounting,[link widoczny dla zalogowanych], l5 years i50 cubic meters, the Black Dragon} 1: Provincial 5o77 production of 75 million hectares of forest land to cubic meters. 2, improving natural poplar forest to natural poplar (A-If Populus) growth conditions and by Xue measures, the present, is tending thinning based. However, the distribution of Populus broad terms,[link widoczny dla zalogowanych], good mix of labor, many forest rot serious distraction, the growth rate. To consider long-term management should be based genetic improvement of forest groups. In order to do long-term genetic improvement of natural poplar work good in the current forest disturbances should be selected to establish the natural gene pool, keep the In appropriate: the development of Yang Shubai region wine container, the establishment of poplar production base, poor Li Bai in the poplar growth areas, the width of planting Paul needle to induce the mixed coniferous. 8, select the product p and the choice of intensive culture of poplar species, is currently the development of poplar fluorescence key. The introduction of cultivated strains of the last plain, fast growth, but strong anti-poor, strong local resistance to the slower growth of poplar. Because, in the active aspen, Daqing Yang, Hong Yang, Yang made sweet express penalty when breeding, J VII-h. ur-line hybrid breeding ? f1. Black Dragon Conlin, research institutes and other similar, EL care pecking quasi species of Populus wide, little] the basis of a black Dang h, breeding a black × wave, black × black small, it plays black × black and other new clones, the 7 years the results of biomedical field cultivation, the growth of more than Populus 3O ~ 54%. 『『 _j Before being Il Yang, Daqing Yang, breeding of Populus and its work, bred for fast growth forests and natural conditions, materials, good variety, is entirely promising. Closely related cultivars and cultivation techniques. Cabinet and other native species of Populus ussuriensis planting methods can be general, cultivars are to take appropriate technical measures. According to forest site conditions, with low to high humidity, thick weeds and soil preparation or strip should be fully built high-profile, good soil row peaceful maturation. T temperature due to lower operation can not be too deep planting seedlings, seedling selection to 2 1 8 2 thousand dry or appropriate. Spacing should be determined depending on tree species Overall, not too thin, tending to reduce the number of years, a general 3 × 3 米 appropriate. Using a large-density, short-term rotation, to alleviate the current shortage of forest resources, economic strain and has a special significance. ▲ bark torch wrong target in the black disk Giang province, 1 species of North American origin of the tree dating back successfully in 1957 by the Beijing plant introduced from Hungary as appropriate, and in Beijing,[link widoczny dla zalogowanych], Shanxi, Shaanxi and Henan provinces i kind of success, but the black and blue guitar and other provinces have been the cold region be considered as non-growth areas. Bin County of Heilongjiang Province Forestry Bureau cadres Hongsheng comrades in i985 in April by the Yulin area in Shaanxi Province Linke Suo g 【small amount of torch tree seeds, one at low temperature 37.77C, frozen for up to 5 months when read, frost-free period only Bin 14D-day trial after five years of local cold acclimation and introduction of successful cultivation. Seedlings have been breeding more than 400 plants each year, of which 5 years old seedlings l2, said the tree up to 6m, diameter 6 cm. Torch the tree, lacquer tree Rhus spp. Tribute to Pi} species, resistance to early and saline-alkali, anti-sand pressure, thermophilic, for fear of flooding. Main features of the students made strong tillering ability and high growth 21T1 year more than 4 years old plants in 4-year period 20 strains of germination in early summer scent the air, summer green leaves and dense early autumn leaves turn red ear, is the tall ornamental tree species. Health and life as caught short (20 years), it can be used as fuelwood species arid plains, and has good ornamental value and economic benefits. (Yue onwards)