Utilize the seedling raising process of black pine to engraft white bark pine
" technical field " the present invention relates to a kind of botanical seedling culturing new technology, particularly belongs to a kind of seedling raising process that utilizes area, north of the Changjiang River black pine to engraft white bark pine.
" background technology " Chinese lace-bark pine claims kahikatea (Pinus bungeana zucc), Pinaceae, Chinese endemic tree again.Aiphyllium, 30 meters of Gao Keda, branch is dredged living and horizontal exhibition, is the umbrella shape tree crown, and is dark green tall and graceful, have characteristic, its bark is peculiar, and green leaf white spirit is as if the silver dragon, branches and leaves need not be pruned the nature moulding between the growth stage, the tree performance grace, and attitude is more beautiful when old, is the distinctive famous and precious seeds of China.Can stand-30 ℃ of severe cold.It is the precious green tree species of the rare aiphyllium in the north.But its shortcoming is a poor growth, has only main root flourishing, and lateral root is less, and a little less than the wind loading rating, adaptability is relatively poor.And the common black pine well developed root system of northern area, the wind resistance strong stress resistance, growth is fast, and seedling is cheap, suitable large tracts of land popularizing planting.If do the stock grafting Chinese lace-bark pine with black pine, both are had complementary advantages, but conventional graft technology is difficult to survive, especially more difficult in northern grafting, main cause is that the technology operation easier is very big, and survival rate is very low, and the expert is considered as the forbidden zone by forestry.By retrieval, in area, the north of the Changjiang River, do not appear in the newspapers with black pine grafting kahikatea.
" summary of the invention " purpose of the present invention promptly is to provide a kind of seedling raising process that utilizes area, north of the Changjiang River black pine to engraft white bark pine, on the basis that keeps the graceful characteristics of Chinese lace-bark pine tree performance, merge the characteristics that the black pine growth is fast, wind loading rating is strong, to reach the purpose that both are had complementary advantages.
The seedling raising process that utilizes area, north of the Changjiang River black pine to engraft white bark pine disclosed in this invention is characterized in that:
1, raw material: do stock with 2 years living black pines, do scion with the living Chinese lace-bark pine end of the branch 4~5cm of growing point place section then;
2, grafting time: hibernation period, i.e. during the January of November then to next year;
3, grafting part: grafting below the growth top of black pine;
4, illumination, Temperature and Humidity Control: in temperature controlled compartment, carry out grafting, shade, avoid the sunlight direct irradiation; Temperature is controlled at 15~25 ℃; Relative moisture is controlled at 60~80%;
5, grafting method: keep the female stem of rudiment during grafting, promptly the growth top of black pine after waiting to survive, cuts institute's retain the stubble; Stretch tight with film in grafting part and to twine; In June, the sapling of grafting survival is shifted out temperature controlled compartment, transplant the land for growing field crops; Before shifting out the greenhouse, the grafting part film that twines that stretches tight is abolished.
The present invention utilizes the characteristics that the fast advantage of black pine well developed root system, wind resistance strong stress resistance, growth and Chinese lace-bark pine are equal, belong to together, give full play to the famous and precious advantage of viewing and admiring of Chinese lace-bark pine, cultivate into famous and precious novel species seedling " grafting Chinese lace-bark pine ", reached the effect that both are had complementary advantages, increased the north evergreen, beautify seeds.
" embodiment " selects for use 100 2 years living black pines to do stock, does scion from the Chinese lace-bark pine end of the branch intercepting growing point 4cm section of giving birth to then, implements grafting in late November.Owing to be difficult to survive under field conditions (factors), must under artificial greenhouse experiment, carry out.Will shade in the artificial greenhouse, avoid the sunlight direct irradiation, temperature is controlled at 15~23 ℃, and is generally high about 10 ℃ than outdoor temperature.Humidity will be controlled at relative moisture below 80%, and humidity is too high, and is easily susceptible, and survival rate is extremely low.Less demanding to soil condition.
During grafting, grafting part is selected in the below, growth top of black pine.Stretching tight with film in grafting part twines, and keeps the female stem of rudiment, after waiting to be sure of to survive, institute's retain the stubble is cut again.In early June, the sapling of grafting survival is shifted out the greenhouse, transplant the land for growing field crops.Before shifting out the greenhouse, film is abolished.
The inventor is in order to check the invention effect, in 2003,2004 did a large amount of field trials in continuous 2 years, grafting nursery stock 7942 strains altogether, survive 7639 strains, survival rate surpasses 95%, growth rate is more than two times of grafting Chinese lace-bark pine sapling not, cultivate the seedling of equal specification and can save the 4-5 year, and disease and insect resistance, resistance obviously strengthens, especially the wind loading rating extra-heavy, substantially there is not dilapidated phenomenon, substantially improve the existing shortcoming of Chinese lace-bark pine, and successfully preserved its original merit, possessed the black pine good characteristic simultaneously, because its growth rate is obviously faster than grafting not, so the grafting price is several times of grafting not.Have high economic society and be worth, should widely popularize plantation.