Our Heterocyclic Compounds has been developing from 2015 year, it is a relatively new class of compounds in our company. Our heterocyclic compounds conducted by a dedicated research and development teams. The R & D team focused on researching heterocyclic compounds, other products are performed by other technical team. Our goal is to catch up with the industry's professional heterocyclic manufacturer. At present our products are mainly composed of pyridine, pyrimidine, thiazole. In addition to our regular products, we accept any form of customized services, to undertake from grams to tons of production. After receiving inquiry, we will give a quotation within 2 working days with coa specifications,If you have special requirements, please provide details in the mail, we will combine the specific requirements and provide an accurate accounting of the costs of the offer. Under normal circumstances, we have the longest production cycle is not more than 45 days. Heterocyclic Compounds Heterocyclic Compounds,Cyclopropanecarboxylic Acid,Benzenedithiol Dihydrochloride Taizhou Volsen Chemical Co., Ltd. , http://www.volsenchem.com
Off-season cultivation of older conifers
With the improvement of living standards, people's requirements for the surrounding environment are getting higher and higher. Conifer species are the main tree species for the greening of courtyards and roads in recent years. Normally from November to April of the following year, it is the regular tree planting season; from August to September, it is the tree planting season during the rainy season. From May to July, it is the anti-season of planting trees. Planting older conifers out of seasons has its own special technical essentials. The external conditions at this time are hot weather, high temperature, dry air, low humidity, large evaporation, and low rainfall; and the physical characteristics of the trees themselves are that the leaves have been extensively displayed, the branches have grown, and the sap has flown normally. Tree planting under this condition is not easy to survive. Therefore, practical measures must be taken to adapt the physiological function of the tree itself to the external environmental conditions. In recent years, Xuchang and other places have been earnestly exploring and have achieved remarkable results. The key to the survival of older conifers is to maintain the water balance in the seedlings. (ie, the water that the branches and leaves transpire into the air is the same as the water that the roots absorb from the soil. The moisture contained in the seedlings can maintain normal physiological functions). Based on this principle, the main technical measures they adopt are: Choose strong seedlings. Because strong seedlings have strong vitality, they have the ability to be patient and resistant to adverse environmental conditions. 2. Protect the root system. Because the root system absorbs moisture and ensures the water balance of the seedling body, the large trees more than 5 years old must have soil balls and are packed with straw and other materials to protect the intact root system and ensure the moisture supply as soon as possible. 3. Recut the crown 1/2-1/3. Reduce the canopy and reduce the evaporation of water in the seedlings. However, when cutting the crown, protect the top buds to ensure that the trees have tall, straight trunks. 4. Timely transportation. As soon as possible to shorten the seedling roots stored in the air. If long-distance transportation, cover with a awning to prevent sun exposure. Watering canopy on the way. 5. The planting hole must be large, and the backfill soil should be fine to ensure that the seedlings will soon grow the root system. 6. Seriously planted. Fill the topsoil first, fill the subsoil afterwards, and keep it layered. Each tree is equipped with two wooden poles to fix the trunk to prevent wind blows and tree branches to ensure that the trees are neat. 7. Watering in time. The first time the water to be poured into the water, after pouring every 3 days, sooner or later every day to spray water to the crown, creating a moist microclimate, so as to avoid dehydration of trees, resulting in physiological drought, this care can continue for more than 20 days. 8. Strengthen management and protection. Prevent the destruction of humans and animals, and always pay attention to observation to prevent pests and diseases. The success of back-season cultivation of large-scale coniferous trees breaks the traditional habit of planting trees in the season, greatly prolongs the time for afforestation, and realizes a transition from short-term seasonal tree planting to four-year tree planting throughout the year. Due to the rapid growth of large-aged conifer species, they can quickly expand the area of ​​green space in the year and advance the functions and benefits of trees in protecting the environment.