High-risk fruit trees in summer

At present, pear, apple production in the "old, low, poor" problem, that old varieties, low grade, poor quality, can not meet market needs. Its variety structure is also unreasonable, there are few premature fruits, the market is tight, there are too many varieties in the late-maturing varieties, and the slow-growing season causes poor sales. Therefore, it is necessary to adjust the variety structure and use high-risk alternatives to transform inferior orchards. The advantage of high accessibility in the summer is that it is easy to distinguish breeds because of the different shapes of different breeds, such as the shape and size of the leaves, the growth of the branches, the characteristics of the tree, and the shape of the fruit. The resulting trees can also be rated for good or bad quality. For the trees identified as inferior varieties, high grafting can be performed. Grafting in the growing season is easy to survive, generally higher than the survival rate of grafting in winter, and it can be operated for a long time. It can be grafted from the maturity of new shoots to the stop of growth, so that it can be easily connected during the year. Generally, it can be carried out from June to September. Summer budding and abdominal connection can be used. The shoots are taken from the fine cultivar tree to obtain a full-grown, full-filled, shoot-free shoot for scion. Using ordinary "D" type budding method, grafted at the base of the main branch of the grafted tree. After 10 days, the survival rate was checked and it was found that when the buds were not alive, the positions were replaced in a timely manner. Two weeks after the survival of the tie, so as not to affect the growth. The replanting site must be the current year or 1 to 2 years old branches in order to change the young saplings. Abdominal connection generally uses 3 to 5 buds of long scion, and branches that grow into flower buds can also be scioned, which can result in 1 year in advance. A scion is placed every 25 cm on the base or branch of the anvil branch. Use a knife to cut at an angle of less than 30 degrees, deep to the xylem, cut 5 to 6 centimeters long, scion cut into a wedge shape about 5 centimeters long, quickly inserted into the incision in the rootstock, align the layers, and then wrap the plastic film strips tight. At the same time wrap the top of the scion, reduce the evaporation of water, and check the survival condition after half a month. Unclamped buds are patched as soon as possible. In the past, you can't solve the problem and leave it to be solved in the spring of the following year. Generally 10 to 12 scions are grafted per square meter of tree crown projection. It is worth noting that the dry season must be filled with water for 1 time before grafting, otherwise it will not be easy to survive. After grafting to survive, before the budding in the spring of the following year, the new buds and parts above the panicle are cut (saw) off to promote budding and ear growth. Eradicate budding on the rootstock in a timely manner. When the new shoot grows to 60 centimeters or so, it picks up the heart and pulls it to promote flower bud formation. Areas with strong winds should be set up to protect new shoots so as not to be blown by the wind. Under the conditions of strengthening fertilizer and water management and pest control, the general results can be obtained in the second year. We have high-risk huanghuali on a 2-year-old pear anvil, which has a survival rate of 100%. In the 3rd year, 3 to 5 main branches are formed. After the branches are drawn and picked up, the flower buds are formed. In the 4th year, the yield per mu is more than 1,000 kg.

Diesel Engine Spare Parts

Diesel Engine Spare Parts,Engine Cylinder Liner,Engine Piston,Marine Engine Spare Parts,Diesel Generator Spare Parts

ZhouShan HeCheng Machinery Co., LTD. , https://www.hcmarineparts.com