The replacement of high branches of pear trees is one of the effective ways to speed up the replacement of varieties. In order to ensure the smooth growth of new shoots, the following aspects of work should be done in production.
In addition to timely sprouting and new shoots germinating from below the grafting interface and in the surrounding area, we must remove or remove the rootstock in a timely manner to concentrate the nutrient supply of grafted varieties.
Regularly loosening high-risk pear trees generally grows vigorously, and a large number of callus tissues easily cause two thick and middle “slack neck†phenomenon at the grafting site. When the new shoot grows to more than 40 to 50 centimeters, it is necessary to check the grafted part for loosening, and then loosen and re-tighten it with a plastic strip. After 20 to 30 days, the grafting site is well-integrated and gradually removes the plastic strips according to the situation.
Set up scaffolds to prevent wind damage In recent years, there have been many strong winds, often resulting in high tree-breaking. In order to prevent wind damage, when the new shoot grows to 40 to 50 centimeters, three small bamboo poles 2 to 3 meters long are inserted under the tree to form a triangular bracket to fix it. And use the plastic rope to control the new shoots, the new shoot and the column to retain 10 to 20 cm of space for activities. Try to keep the original position and angle of the branches. One column is poorly fixed and has weak wind resistance.
Fertilizer management Pear tree shoots have a short growing period, and it is important to grasp the early growth. After grafting and survival, apply 20 to 30 kg of diammonium phosphate per acre, and pour once into the water. After the bright leaf stage, foliar fertilizers such as foliar treasure and potassium dihydrogen phosphate were sprayed to increase the growth of new shoots. In June and July, the drought should be replenished in a timely manner. After August, as little irrigation as possible should be done to prevent the shoots from becoming long and safe for winter.
Pest control grafting trees generally have less disease and mainly control pests. In the early stage of growth, the control of aphids, pear stem bees, and pear hibiscus were performed. After June, the control of leaf roller moths and cockroaches was mainly injurious. Pharmacy can choose to use insect light, Amy Music, An Lubao, green kungfu and so on.
Because of the large number of pear trees, the consumption of soil nutrients in orchards increases the number of pears in the orchard. To grow grass in the orchard can create a good ecological environment for the growth of pears, and it is also effective in increasing soil fertility. After 2 to 3 years of growth, the content of soil organic matter can reach 1.2% or more, and the orchard's fertility obviously increases, which coincides with the height of the tree's entering the fruiting period, which is very favorable for the production of high quality pear fruit.
Disclaimer: Some articles in this website have been transferred from the Internet. If you are involved in third party legal rights, please inform this website. phone
Food additives refer to chemical synthetic or natural substances added to food for the purpose of improving food quality, color, aroma and taste, as well as for the needs of anti-corrosion and processing technology. Generally, food additives may not be food and may not have nutritional value, but they must conform to the concept of the above definition, that is, do not affect the nutritional value of food, and have the function of preventing food spoilage, enhancing food sensory properties or improving food quality.
Generally speaking, food additives can be divided into natural and synthetic categories according to their source. Natural food additives refer to natural substances extracted from the metabolites of animals, plants or microorganisms as raw materials. Chemically synthesized food additives refer to substances obtained by chemical means through oxidation, reduction, condensation, polymerization, salt formation and other synthetic reactions of elements or compounds. Most of the chemicals used today are synthetic food additives.
According to the use, the classification of food additives in various countries is almost the same, the difference is mainly the difference in the classification of how much. The United States divides food additives into 16 categories, Japan into 30 categories, China's "Health Standards for the Use of Food Additives" divides them into 22 categories: Antioxidant preservatives (1) (2) (3) (4) bleach hair color agent (5) concreting citric acid (6) (7) loose agent (8) thickening agent defoaming agent (9) (10) sweetener (11) colorants emulsifier (12) (13) improver (14) anticaking agent (15) flavor enhancer (16) (17) of enzyme preparation was preparing foaming agent (18) (19) preservatives (20) spices (21) nutritional fortifier (22) other additives.
buy food Additive ,wholesale food Additive,food Additive for sale,food additive benefits
Shaanxi YXchuang Biotechnology Co., Ltd , https://www.peptidenootropics.com