Nectarine cultivation techniques are basically the same as other peach cultivation techniques. However, in order to successfully preserve the characteristics of the variety and achieve high and stable yield, the following points of cultivation techniques are specifically formulated: 1. The nectarine has a short resting period, budding, early flowering, and sunny sunshine. , Not tolerant to yin, fear of flooding, not suitable for sticking to soil and other characteristics, it should choose a higher temperature, better microclimate, late frost, leeward sunny, loose soil, fertile, ventilated drainage better land. 2. Variety selection The nectarines are divided into early, middle and late dates according to the maturity period. According to the local market supply, the cultivars can be selected flexibly. 3, nursery can be used grafted seedlings, high-replacement first-class methods for breeding, rootstock using peach or peach. 4. Pollen variety Nectarine has a large amount of pollen and has strong self-pollination ability. Cross-pollination can enhance its fruit characteristics. Therefore, when cultivating, the nectarine can be mixed with other cultivars and the fruit quality will be better. 5. Colonization and colonization should be followed by soil thawing in spring and autumn after defoliation. Colonization density should be 55--64 plants per mu. Colonization method: can be used for planting with ditching or large holes. The planting hole requires 80--60 cm. Straw 10 kg, 200 kg farmyard fertilizer, and then cover the soil layered trees, do not apply fertilizer. After the colonization, immediately dry it according to the remaining tree shape and cover the mulch. 6, soil, fertilizer, water management 6.1 soil management. The purpose is to create a deep, loose, nutrient-rich soil environment for the root system. Before the construction of the garden, deep fertilization or digging of the soil should be used to concentrate the fertilization. Afterwards, in combination with autumn basal fertilization, the cavern is gradually expanded. Cultivated grass. The nectarine roots are well developed and require better ventilation conditions. During the growing season, many cultivator weeds are used to ensure that the surface is loose and the nectarine grows quickly. Reasonable intercropping. In order to improve the light and heat of the land, the young gardens may be properly intercropped with water and gas resources, but do not affect the growth and development, do not spread pests and diseases, and do not compete with the trees for fertilizers such as green manures, melons and vegetables, beans, and other low-stem dwarf crops. 6.2 Fertilization. Basal fertilizer, mainly farmyard manure, with superphosphate, from the second year of colonization, 150-200 kg of basal fertilization per year; sapling (2- 4 years) is dominated by nitrogen fertilizer, fertilization per plant 1 - 4 kg, appropriate amount of phosphorus and potassium, enter the result period, increase the proportion of nitrogen, phosphorus, potassium year by year, the general requirements of 2:3:2 is appropriate, and appropriate additional trace elements. 6.3 irrigation. Annual rainfall in the area above 500 mm may not be watered, but due to the relatively dry conditions in the spring in our district, in order to ensure normal development or to avoid late frost hazards. It is required to be fully irrigated once in the germination period after thaw, and once before freezing. 7, plastic trim nectarine tree apical dominance is stronger, more branches, new slightly faster growth, flower buds easy to form, early cultivation of high yield tree shape is important, often using three main branches of natural happy shape and two main branches happy shape, Short-distance stratification, but according to cultivation methods, density and other flexible control. 7. 1 happy shape. The crown is relatively tall, and the resulting parts can make full use of space, high yields, and are suitable for the pure construction of Taoyuan. Plastic orthopedics generally requires two or three main branches, that is, 50 to 60 centimeters in the year, 40 centimeters from the ground, leaving the first main branch, and leaving the second and third main branches at about 20 centimeters from the first main branch. Remaining main branches are required to be robust, evenly spreading in the three directions around the main trunk, and the remaining branches are all controlled to grow and left as auxiliary supporting branches. The main branches are appropriately shortened during winter cutting, and they are allowed to extend and expand the crown, each main branch 30 cm. Left and right way to stay 2 - 3 lateral branches, the remaining branches according to its position, take the weak stay strong, take the left side, take far away to stay near the pruning method, in summer when the new shoots grow to 40 cm in time to pick up the heart, promote The second branch is made and the absurd branches and the dense branches on the back are removed to achieve ventilation and light transmission, and the resulting skeleton is cultivated earlier. 7.2 Closely spaced evacuations. Fruit trees are suitable for planting. The plasticity requires the selection of the main branches of 5-7 pieces, that is, 40--60 cm in the year. After that, leave the first main branch at a distance of 50 cm from the ground. The main branch spacing is 50 cm in the wrong direction to leave 5--7. A main branch, leaving two to three lateral branches per main branch, and the remaining branches as an auxiliary culture, gradually form a vertical structure, which can make full use of light and water between the rows of fruit trees, increase the income per unit area. 7.3 Thinning and fruit thinning. The use of "light weight first", staged, can also be combined with summer shear, the method is: appropriate short cut slender squid, retraction pendulous squid, remove sick and weak flowering branches and densely squeezed flowering branches, the first fruit thinning in 5 In the middle of the month, the main evacuation and fruit production, malformed fruit, small fruit and basal fruit, and tip fruit were carried out. The second thinning of fruit is carried out from late May to early June. Generally, 20% to 3 fruit and 2 to 1 fruit in the middle fruit branch, 1 fruit in the short fruit branch, and no less than leaf to fruit ratio. 50:1, fruit spacing not less than 20 cm. 7.4 bagging. The eastern part of Mindong has a continental climate. During the period of nectarine fruit enlargement, it is often subjected to natural disasters, resulting in cracking of nectarines, unclean fruit surfaces, and a drop in the fruit rate. In order to improve the quality of nectarine fruit, to achieve green food, adopting bagging technology can make up for many drawbacks and be economically effective. That is, after the fruit peeling is performed in mid-to-late June, the common bag or plastic bag that can be sold on the market can be used for bagging. The method is the same as apple bagging technology. 8, pest control. The major pests and diseases of nectarine include: peach anthracnose, brown rot, lobular leaf disease, peach aphid, leafhopper, leaf leaf moth, etc. For this kind of pests and diseases, 5 degrees lime sulfur is sprayed before budding and once after flowering. % 蚜虱 net WP agent 2000 times, sprayed 72% of agricultural streptomycin 3000 times and 800 times of dichlorvos respectively in early May and early June of June can prevent and cure lobular disease, peach aphid and other pests and diseases. Residual fruit, diseased fruit, diseased leaves and leaves, to prevent the main, timely observation and timely prevention and control to ensure the tree's annual healthy growth. Chinese Agricultural Editor
Organic Intermediate
Organic intermediate is an important raw material in chemical production. It is an intermediate step or intermediate product in the manufacture of various organic chemicals. Organic intermediates are often key components in organic synthesis and can be converted into the final target product through further reactions.Here are some common organic intermediates:5-Heptylresorcinol,2-Methylimidazole,Tetrabutylammonium bromide,Benzaldehyde,Sodium p-toluenesulfonate,Ethyl difluoroacetate,2-Imidazolidone hemihydrate,Guanidine Hydrochloride,Bromoacetaldehyde diethyl acetal etc.
These organic intermediates are key steps and raw materials in chemical synthesis, and they undergo further reactions, transformations and purification to obtain the final organic chemicals, such as drugs, dyes, plastics, coatings, etc. The supply and production of organic intermediates are essential for the development of the chemical industry.
Intermediates in organic chemistry are a class of compounds between the starting material and the final product in the process of organic synthesis.
They usually have a specific chemical structure and reactivity and act as a bridge in organic reactions. The existence of intermediates in organic chemistry makes the synthesis of complex organic molecules possible.
Some common organic chemical intermediates include: carbocation, carbanion, free radical and so on. Carbocation is a kind of positively charged carbon atom with high reactivity and is an important intermediate in many organic reactions, such as electrophilic substitution reactions. Carbanion is a negatively charged carbon atom, often used in nucleophilic substitution and addition reactions. Free radicals are atoms or groups that contain unpaired electrons and play a key role in free radical reactions.
The properties and reactivity of organic chemical intermediates have important effects on the route and efficiency of organic synthesis. Through reasonable selection and use of intermediates, the efficient synthesis of target products can be achieved. Their preparation and application is one of the important contents of organic chemistry research.
In industrial production, organic chemical intermediates are also a key link in the synthesis of many chemical products and drugs. Their in-depth research and development can help improve production efficiency, reduce costs, and promote the birth of new organic compounds and materials.
Organic intermediates,Organic intermediate supplier,Bulk Density of Microcrystalline Cellulose
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