Due to the sunny weather between autumn and autumn, the temperature is stable, the soil moisture is suitable, it is conducive to picking and catching rape, and the progress is fast. The proportion of suitable planting and planting is relatively high. After planting, the tree is fast and easy to grow, but there are also seedlings. Problems such as unbalanced situations, unsupported trenches, high density or insufficient density, and potentially serious threats such as grass damage, moisture damage, and frost damage. Therefore, we should do a good grasp of rapeseed before the winter in addition to, control and promote strong, supporting the ditch, due to seedlings and fertilizers in autumn and winter field management, and strive to seedlings overwintering.
The current outstanding issues
1. Weeds have a high base and rapid development, and the proportion of rapeseed fields with controlled indicators has been high since the autumn sowing. Wet weather, high temperatures, and better lyricism are conducive to the growth of weeds. At present, the area of ​​weeds growing in no-tillage rape fields is large and the amount of grass is significantly higher than that of the previous year. According to the survey, the area covered by weeds in the rapeseed field in the province is about 500,000 mu. If it is not timely, it will result in weed damage and the formation of grass bullies.
2. The potential for wet-saliving hazards is relatively large. At present, 74% of the rapeseed fields in the province have been ditched. There are still more than 20% of plots that are not open or have poor drainage systems. For example, if the rainwater continues to increase in the later period or the short-term precipitation is greater The threat of wet damage and waterlogging will be further aggravated, which will affect the growth and development of rapeseed roots and lead to a decline in the quality of seedlings.
3. The threat of freezing damage is greater since the autumn sowing this year, the temperature is high, the locust is good, the rape grows fast, the young shoots are tender, the ratio of carbon to nitrogen is unbalanced, the sugar content is low, and the cold resistance and frost resistance are weak. In addition, the province's late-planting and late planting of weak seedlings and early planting of the long-grained seedlings with an area of ​​more than 500,000 mu. In the event of a strong cold wave, the temperature drops sharply and it is very likely to cause severe freezing damage, resulting in freezing of leaves, leaf stems and roots.
Winter field management measures
1. Warming and robberies should be carried out in addition to chemical control. When the average temperature on the day before the winter is above 5°C, grab a sunny day and use drugs to ensure that there is no frosty weather below 0°C in 7 days after treatment, in order to improve the elimination effect and avoid phytotoxicity. In rapeseed fields mainly composed of grasses and weeds, weeds are sprayed with 5% high-efficiency fluphanopyrhyantin EC 30 to 40 ml per acre in the 3 to 5 leaf stage of weeds; rapeseed fields mainly composed of broadleaf weeds are used. 30% per acre with 50-60 ml of herbicides and 50 ml of water spray; rape fields mixed with grass weeds and broad-leaved weeds, with 17.5% of fine quinquinone per acre Ling Ling 80 to 100 ml of water spray. Before winter, as much as possible, 15% per acre paclobutrazol WP can be sprayed and sprayed with 60 to 80 grams of water, so as to control and prosper the role of anti-freeze. Early sowing and early planting, excessive seedlings of rape as appropriate spray, rapeseed normal growth of rapeseeds or spray.
2. Early support of “Sangou†For rape fields that have not yet been excavated in the trenches, excavation of internal and external “three ditch†should be carried out as soon as possible, and the ditch system standard should be raised, horizontal trenches should be added, ditch heads should be connected, and the ditch system should be kept unblocked. , To improve the capacity of drainage and drainage, to ensure smooth drainage, rain and dry land, to prevent continuous severe rain and winter rain caused by winter and spring severe frost damage. For the “three ditch†blocks that have been excavated, timely inspection should be carried out to prevent the problems such as the unconnected ditch heads and the sloping heads of the ditch, so as to ensure smooth drainage.
3. For Miao Miao Shi Xi Miao Fei, rapeseed in our province, the total nitrogen application of 18 kilograms per acre is appropriate, nitrogen fertilizer in the base seedling fertilizer should generally account for 50% to 60% of the total nitrogen application. Phosphorus fertilizer and boron fertilizer should be applied to the base, potassium fertilizer sub-basic Miaofei and manure fertilizer should be applied twice, and the use of potash fertilizer should be increased appropriately. For late seeding and late planting of weak seedlings, red-frozen seedlings, and unbalanced rapeseed fields, Shiiti Miaofei should be supplemented early and the proportion of basal fertilizers should be appropriately increased. Generally, 7.5 kg of urea should be added per acre. For the high-yielding production of 10,000 mu demonstration plots or rape fields in hilly areas, special emphasis should be placed on the application of boron fertilizers.
In addition, after entering the overwintering period, cold weather will occur frequently and preparations for anti-freezing and anti-flood preparation of rapeseeds will also be made. Generally 150-200 kg of straw per acre evenly covered in rapeseed rows, can play the role of antifreeze and seedling protection. During the winter season, the farmer's fertilizer can be used in combination to clear the roots of the oilseed rape with 500-1000 kg of farmhouse fertilizer per acre. In case of rain or snow, it is necessary to promptly clear the ravine and eliminate the accumulated water. After the occurrence of frost damage, the injured fertilizer can be properly applied according to the degree of freezing.
Dental handpieces are divided into high-speed and low-speed, and high-speed is used to drill holes and extract teeth. Used for polishing at low speed. The principle is to connect to the Dental Chair and use air to drive the movement to drive the bur to rotate. It is one of the commonly used Dental Equipment. High-speed mobile phones will be replaced in 3 months. Low speed can be used for half a year to a year (depending on the number of patients and frequency of use).
Dental Handpiece,Dental Lab Handpiece,Electric Dental Handpiece,High Speed Dental Handpiece
Hebi Tianchi Trading Co., Ltd , https://www.hebitianchi.com