The summer heat is around August 23 of each year. The farmer said: "A fall and a rain is cold," the temperature gradually decreases, sunshine is abundant, and rainfall decreases. This is an important period for the cultivation of vegetables, planting and management of facilities, and it is also a critical period for the management of autumn vegetables in open fields. At the same time, pest and disease control must be strengthened.
Autumn and winter greenhouse crop colonization
Autumn and winter sun greenhouse greenhouse tomato, eggplant, pepper and other thermophilic crops suitable for planting in late August-September, good heat preservation greenhouse can be appropriate later. It is necessary to buckle the film in advance and disinfect the greenhouse and the soil. Apply organic manure as base fertilizer and fine soil preparation; choose strong and uniform seedlings of the same size and size, and require suitable depth and density. Because of the higher temperature, the planting in the sunny afternoon is better, and sufficient water is poured in time.
Celery colonization
The open field celery is planted in late August and the celery planted in the autumn greenhouse is planted at the end of August-September. It is necessary to apply sufficient organic fertilizer, which is decomposed and crushed, to finely prepare the soil for planting on a sunny afternoon.
Autumn greenhouse crop management
The tomatoes and cucumbers planted in the autumn greenhouse are at the fruiting stage. During the flowering period, the plants such as loofah, bitter gourd, pepper and eggplant are also in the flowering period. The weather gradually cools down, which is conducive to flowering pollination and fruit enlargement. Field management should be strengthened. , To promote the high rate of fruit products with multiple knots. Management measures must first adjust the appropriate temperature, light and humidity; timely pruning, around the fall vines; tomatoes can be used to pollinator-assisted pollination to increase the fruit setting rate; eggplant in the greenhouse when the temperature is too high to sit on the fruit, using Good safety "Fengfenji No. 2" spray or silk flower. Also timely watering, top dressing. To strengthen the prevention and control of pests and diseases, in particular to prevent the occurrence of tomato yellow leaf curl virus, the entrance and outlet with a 50 mesh insect net seal, timely control of the damage of tobacco whitefly.
Chinese cabbage management
Timely seedlings, Dingmiao seedlings, Chinese cabbage first seedlings when the seedlings pull crosses, seedlings 7-8 centimeters apart, second seedlings in 4 true leaves, removing seedlings, weak seedlings; in 8 true leaves Dingmiao. Eliminate strong seedlings, eliminate weak seedlings, pests and miscellaneous seedlings. Timely cultivating loose soil and weeding, watering in the rows at noon when the temperature is high in sunny days. The lack of seedlings and ridges were transplanted and transplanted in time. For the inability to timely sow plots, seedlings are transplanted and transplanted. When seedlings have 5-6 true leaves, they are transplanted. It is suitable for transplanting 3-4 days before and after the summer festival. Transplanting in the sunny afternoon is beneficial to slow seedlings. Watering in time after planting. The cabbage planted in July should be top-dressed in time. Pay attention to the prevention and control of viruses, downy mildew, aphids and other pests and diseases.
Management of carrots and carrots
A variety of radish and carrots from the seedling stage gradually into the stem and leaf growth period, and time seedlings, Dingmiao, cultivator loose soil, combined with scotch removal of weeds. To control watering, drain water in time when it rains.
Autumn and winter open field cauliflower, cabbage and other management
The cauliflower, cabbage, lettuce and other crops planted in the open field in the autumn are the stages for the development of the long outer leaves of the tree. The first step is to cultivate the loose soil and “seedlingsâ€.
Potassium Tert-butoxide CAS No.865-47-4
Potassium tert-butoxide Basic Information
CAS: 865-47-4
MF: C4H9KO
MW: 112.21
EINECS: 212-740-3
Mol File: 865-47-4.mol
Potassium Tert-butoxide Structure
Melting point 256-258 °C (dec.)(lit.)
Boiling point 275°C
density 0.910 g/mL at 20 °C
Potassium Tert-butoxide Application
1. Used in pesticides, medicines, printing and dyeing, Catalysts, etc.
2. As a strong base, it is widely used in the condensation, rearrangement and ring opening reactions in organic synthesis such as chemical, pharmaceutical and pesticide.
3. It is a moderately strong base commonly used in organic synthesis.
4. The reason why t-BuOK is widely used is that it is inexpensive and readily available, and its basicity changes depending on the selected reaction solvent.
5. For Stobbe condensation, t-BuOK is a better base than EtONa, with higher reaction yield, shorter reaction time, and no side reactions of ketone or aldehyde reduction.
Potassium Tert-Butoxide,Potassium Tert-Butoxide Cas No,Potassium Tert-Butoxide Msds,Potassium Tert Butoxide Formula
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