Medical Spray,Bissell Antibacterial Carpet Cleaner Solution,Clorox Commercial Solutions Clorox Disinfecting Wipes,Swiffer Wet Jet Antibac Jilin Manyitang Pharmaceutical Co., Ltd , https://www.likangpharmaceutical.com
The current freeze damage is mainly caused by freezing and frost. Its performance is mainly caused by the damage of leaf buds, and the frozen leaves are all the largest long-handled leaves in the upper layer. Generally, the upper half to the third of the leaves are frozen and burned at the beginning. Wilting, after gradually losing green and white, yellow and withered, a few early sowing early planted fields with early moss, Lei moss frozen, frozen Leilei shrinking drooping. According to the investigation, there are three types of fields that are suffering from cold damage. First, some of the fields tend to be prosperous. These fields are lightly frozen. Generally only 1-2 leaves of some plants are frozen; The fields with moderate but moderate nitrogen but high nitrogen application levels and green leaves are heavy in freezing. Generally, the plants have 2-3 leaves that are frozen; This type of plot was the most heavily chilled, with 3-4 leaves of all plants wilt, frozen buds, and drooping.
In view of the current freeze damage and large-scale production of rapeseed, the following field management should be done in a timely manner:
1. Remove frozen moss and timely apply fertilizer: For early-season rape that has been frozen, pick it in a sunny and timely manner, and avoid rainy days to avoid causing wound rot. Immediately after picking the moss, the quick-acting fertilizer is applied to the plant to compensate the nutrients in the plant and promote the restoration of growth so as to facilitate early growth, rapid growth, and multiple branching. For rape with frozen leaves, suitable quick-release fertilizers should also be applied to promote the recovery as soon as possible.
2, see Miao chasing fertilizer: wax has a dual role, one for the winter insulation resistance to cold, and second, the growth of strong moss in spring, it is a kind of winter Shichun fertilizer or seedling moss fertilizer. The application time and amount of wax fertilizer and the type of fertilizer should be determined by seedlings, and should generally be applied at the end of December and early January. For the current application of no wax fertilizer to be completed as soon as possible before mid-January, growing a good type of seedlings discretionary application of 3-5 kg ​​of compound fertilizer, poor growth of the second and third types of seedlings can be applied urea 3-4 kg plus Compound fertilizer 3-4 kg.
3. Thoroughly excavate the three ditches: The use of winter leisurely to excavate the three ditch, especially the paddy field rape is particularly important to prevent the spring rain caused by waterlogging and affect the normal growth and development of rape.
Rape cold damage and management advice
This year rapeseed planting period adapts, the autumn temperature is higher, the farmer households cast more fertilizer, the management is fine, and the rape grows generally well. The winter solstice seedlings were surveyed and the green leaf of the oil menu increased by 2.9 pieces compared with the previous year. The roots and stems increased by 0.5cm, and the seedling height increased by 7.2cm. Due to the periodic low temperatures (-4.8°C on the 31st of the 31st) and freezing on December 22nd-24th and 28th-31st, some degrees of frost damage occurred in some rape crops.