1. Biological characteristics and distribution of the mammoth
The populustomentosacarr belongs to a tall wood, up to 30 m, with a chest length of darm, a straight trunk of trees and a crown cone. Skin ash is white, smooth, the base of the old tree is rougher and the colours are cleavaged. A larger ovulation or spherical form with or without hair and hair on the edge of a bud. The leaves on the precipitous branch are triangles of cylindrical leaves, with a tip of the front end, a near-heart or transect of the base, and a large sawn on the edge. The leaves on the old tree are small, have wave teeth, and the twigs, the leaves of the young, and the leaves of the young bear, and on the back of the leaves, have secret grey white wool, and the old are falling off or leave very thin wool. The female and male species, with a soft bouquet, had a flowering period of march, with a fruiting period of 14 cm in the middle of april, with a split of two petals。
Mao bai yang has been growing in our country for more than 2000 years. Liaoning, southern inner mongolia, henan, hebei, shandong, shaanxi, hubei, jiangsu, zhejiang, gansu, ningxia, etc. Are distributed and cultivated. Among them, the yellow river is a viable distribution area. Cultivation is practised in the shenyang, dalian, camp, jinzhou and guang island regions of my province, but in relatively small numbers, and has tended to increase significantly in recent years. In cities such as beijing and tianjin, which are important greening species. It has long been praised by the people of china and the outside world for the size of the trees, their strength, their power and their vision。
Mao yang is a temperate tree that requires cool, wet weather, poor cold resistance and vulnerability to freezing, as demonstrated at shenyang agricultural university botanical garden。
The mammoth is a species of radiant trees, with a long life and rapid growth, full crowns and trunks, which are the best species of greening around the side, agricultural forest networks and fast-growing and productive forests, with high material quality and a wide range of applications, and are important raw materials for the fibre industry in addition to the active materials。
Mao yang is resistant to tobacco and pollution and is an important tree species for urban greening and for the greening of mines, and has not yet been found to be exposed to light shoulder steroids in shandong, hebei, kyoyo and zin regions. This is the best tree that i have chosen to bear against silhouettes in the sanbe forest area of my province。
2 marriage methods and main technical measures
Based on the principle of genetic variation, a combination of natural selection and artificial selection is used to attract mutilators and, depending on its biological characteristics, in particular its non-sexual reproductive difficulties, to conduct a marriage test with the following main methods。
2. 1 fung-bing-bing
2. 1. 1 dowry test principles. After wedging, wedges divide the thin-wall cells that form a layer of aluminum, forming a healing tissue, filled with gaps in the conjoining parts, connecting the thin-wall cells of aluminum and a loaming tissue, and then continuing to divide them into new wood, pelvis and conductive tissues, connecting the aluminum to the conductive tissue of aluminum, ensuring the transmission of nutrients and water, and becoming a new plant。
2. 1. 2 the selection of the earring period is appropriate for early winter and early spring. From the parent tree, a one-year sprout of well-developed, disease-free, non-mechanical damage, shorter nostrils, full and full of seed is chosen for the ears. The beams shall be picked at the end of the autumn and then shall be hidden. The test was based on a year-old branch from the qin emperor island seafront。
2. 1. 3 the preparation of aluminum is made from roots to ensure first that the number of roots cannot be less than 80 per cent of a reasonable number of plants and is evenly distributed and that there is no continuous space. The age of deforestation is mid-age or near-maturity, and it should occur in winter or early spring to avoid evaporation of the roots. The roots are at 5-10 cm. Low and plentiful, and not easy。
2. 1. 4 the time of matrimony after the flow of nectar tree fluid, the cortex and wood parts can be separated, i. E. The beginning of the matrimony when the skin can be squeezed with the hand, usually in mid-april。
2. 1. 5 the first step in the method of mating is to select the ears: to cut out the slightly sharp, unsaturated and poorly wooded parts of the shin, and to use the same length of the branches, which are fully full of non-mechanical wounds; and to cut the ears: to cut them with four knives, to cut the side of the sprout by 0. 3 to 0. 5 cm below the back of the sprout, to slash the sides of the sprout by one blade and two and three blades by one blade, to make both sides appear slightly into layers, to cut the side of the slash on the side of the slash, to cut the long, to cut the face up to 1. 5 cm, to keep 1 to 2 stubbles above the stubble, and to cut them by 1. 0 cm。
(b) pay attention to the accuracy and speed of the blade, to the level of the knife, and to the extent that the ear is sharpened and inserted to prevent dry water; the third is an incision of the ear: in the middle of the logs and pelvis of the roots, the blades open the small stitches, which are then inserted into the ear, and the top of the slopes is attached to the wood. Be careful not to pierce the skin of the aluminum, not to be too white. Two or three ears each, two ears each, one to the east and one to the west, with a “one” font, three ears each, and a positive triangle; four are mud interfaces: when you've got the ear and the wood, you squeeze it with your hand. (c) stay on the interface and then stow the interface with mixed clay, and immediately use the surface wet soil to purge the ear and the root to the point where it remains。
2. 1. 6 management after marriage. At that time, one more platinum, as much as possible, will be left with 10 cm in order to prevent windfall and to remove the twigs from the roots. During the growing season, weeds around the roots are removed in a timely manner, with conditions of one to two fats, promotion of forest and wood growth, and pest control。
2. 2 root marriage to mao yang
2. 2. 1 the principle of marriage is the same as the root of marriage。
2. 2. 2 the selection of the remembracing。
2. 2. 3 arsenal wood is prepared. The logs are selected for one year of life with a small drill, which is flatened before the marriage, with a part of the ground remaining between 3 and 5 cm, cutting the upper mouth to the ground and pouring water once before the marriage。
2. 2. 4 at the time of the marriage, the marriage is to be contracted with the root。
2. 2. 5 methodological steps to be followed in marriage: first, in the ear: in the root; second, in the ear: in the root; the third is the cutting of the aluminum: it chooses a one-year-old little drill, with 3 to 5 cm on the ground and a cut to the surface; the four are the emits: in the middle of the wood of the aluminum and of the tenacity of the leather, the stitches of the blade are cut open, which are then inserted into the ear, and the top of the slope is attached to the wood. (b) be careful that the skin of the aluminum cannot be pierced, be overly white, be strangled, and be kept to a minimum, in order to reduce the loss of moisture, evaporation of nutrients and the effects on life; five are binding interfaces: the ears are tied to the wood and plastic strips are tied。
The left hand grips the wood, presses the lower end of the ear and the lower end of the plastic bar with its thumb, and sets the other end of the right hand to the lower end, entanglementing with a ring, laxity, entanglement, entanglement through the interface, tightness of the upper end of the interface, entanglement from the top to the lower end, entanglement to the lower end of the bar, and crushing the plastic strip to prevent relaxation。
2. 2. 6 the management of the marriage shall be followed by a perforation of water once after the marriage, and shall begin to move after 10d, with leaves around 20d and plastic strips to be removed when three to four pieces of leaves are released. Since then, it will be necessary to remove the twigs from the logs in a timely manner, to strengthen field management, to remove grass, pine soil, fattening and watering, to prevent and treat diseases and pests and to create a good growth environment for the mammoths。
2. 3 breathing mao yang
The one-year-old staggered liaoning yang was chosen to make gillwood, cut off the side branches and sprouts each tree at a distance of between 15 and 20 cm, with roughly three to five sprouts each and one sprouts each, together with plastic strips, to be removed after 7d wounds have been healed. At the end of the autumn, the whole branch will be cut alive, then it will enter the cellar and hide in winter, and the next spring will be used for marriage or planting. The sprouts not only produce high rates of activity, but also produce more specks, which are a “short and flat” method of breeding the mahogany. Roots can also be used for afforestation。
A total of 869 sprouts, 3,000 sprouts, 2460 live sprouts and 82 per cent live。
3. Test results and analysis
3. 1 comparison of test results
3. 1. 1 a comparison of the incidence of marriage is shown in table 1 below。
3. 2 analysis of test results
3. 2. 1 analysis of the survival rate second is the large area of nutrients and the availability of adequate water fertilizer; three are the result of earth-breathing, so that the water in the ear is not evaporated, and it is not easy to break. (b) the reason for the low rate of marriage: firstly, the selection of the ears is not strong enough; the second is that plastic strips are not entangled in a reasonable and timely manner, and the third is that the roots are incorrigible and do not produce soil, are prone to collision and wind。
3. 2. 2 growth analysis the growth of fermented and luminous yangs, regardless of their high growth and run-off growth, is due to their small size, their high nutritional range, their abundant water fertilizer and, in particular, their near-one-fold increase in the earth's run-off compared with the normal-planted small-scale driller。
The matrimony is carried out in nurseries and, from a nursery point of view, the maximum value of its long and high growth is equal to that of one year of life in liaoning, which is higher than that of a small diamond。
3. 2. 3 cost-benefit analysis the replacement of low-yield forests and agricultural forest networks is not only long-term but also costly. In the case of the rehabilitation of the farm forest network to plant liaoning yang, for example, the cost of afforestation compared to the cost of marrying mau liang yang can be seen as representing only 21. 6 per cent of the cost of reforestation, or about 1/5 per cent, which is half the cost of normal afforestation. Details are given in table 5。
Conclusion
The use of high-quality, fast-growing mammoths for rooting, rooting, budding and successful trials has opened new avenues for the rehabilitation of low-yielding yang trees in our province's san-nord protected forest area, the renewal of agricultural forest networks, greening of towns and villages, water, canal forests in the road sector and the rehabilitation of road forests, among others。
The simple, easy-to-do method of grafting a mahogany with a high rate of activity, high growth, soil and climate adaptation, and low cost, is of wider outreach value in my region。
On the basis of the biological characteristics of mao yang and the climatic conditions in the three-north-protected forest areas, after nearly three years of investigation, the area of jinzhou and zhong island is now safe from winter and unfrozen, and on the larvae that we have grown wed, we should be careful to prevent and combat the harm caused by the white plum-wing moth。
In order to address the problem of one year of graft and low-life rates, we will in the future introduce the test of haze, seedling, earth-breeding and seedlings in order to produce more high-quality mammoths for reforestation and to create greater economic benefits。
