The remedial measures after frost injury of rapeseed

The frost damage of rape is mainly caused by freezing, which is mainly manifested in the freezing of leaves and buds, and even the roots are frozen. The buds and horns of some early maturing varieties may be frozen. With regard to the large-scale frost damage in the current rapeseed production, the author proposes that after the temperature rises and stabilizes 7 to 10 days after the end of freezing, timely management of the field should be carried out, in particular, topdressing a manure to compensate for the nutritional losses caused by freezing damage. Helps increase the number of branches and buds.

First, remove frozen pods and partially frozen dead leaves, and apply fertilizer in time. Severely frozen leaves, early pods, and early flowers should be removed on sunny days. However, it is imperative to remove the dead leaves, pods and branches on broken leaves, broken branches and dead leaves, so as not to cause wound rot. Immediately after removal, quick-appropriate fertilizers were applied to the crops to compensate for the nutrients in the rapeseed plants and to promote the restoration of growth so as to facilitate early growth, rapid growth, and multiple branching. For rape with lighter leaves, it is also necessary to chase the fast-acting fertilizers appropriately to prompt the recovery of growth.

Second, see seedling fertilizer, cultivator soil. After clearing up the frozen scorpions, leaves and branches, see the seedlings timely fertilize. A class of seedlings that grow well, apply 5 to 10 kilograms of compound fertilizer and 5 kilograms of urea per acre, combined with cultivator for soil cultivation. Poor growth of the second type of seedlings, fertilizer per acre 10 kg, 10 kg of urea, can be divided into two applications, combined with cultivator to earth. The three types of seedlings with the growing potential difference and the external seedlings, 15 kg of compound fertilizer and 15 kg of urea per acre can be divided into two applications and combined with cultivator for soil cultivation.

Third, the ditch. Ditching is particularly important for paddy field rapeseed, so as to prevent water damage caused by spring rain, affecting normal growth and development, or causing temperature and humidity conditions to induce damage due to spring temperature rise.

Fourth, outside the top dressing. Due to the excessive nitrogen fertilizer, the green rapeseeds were sprayed with 0.2% to 0.5% potassium dihydrogen phosphate per acre for foliar spray and sprayed twice, with an interval of 7 days. For lean rapeseed, the application of 0.5% to 1.5% urea solution can not only prevent freezing, but also promote growth and improve the cold resistance of the leaves. For the rape with large and vigorous growth of leaves, spraying 15% multi-effect 50 grams water 50 kilograms can reduce the degree of frost damage.

Fifth, change to other crops. If rape has died or is mostly dead, it is advisable to change the spring potato or fast-growing vegetables to compensate for the loss.

Medical Disinfection Products

Blood Pressure Monitor,Medical Digital Blood Pressure Monitor,Medical Alcohol Swabs,Disposable Alcohol Prep Swab

Surgimed Medical Supplies Co.,Ltd , https://www.surgimedcn.com