Increase
1. Where there are irrigation conditions, drought should be watered as soon as possible as soon as possible to increase soil moisture, and it is best to use a small amount of manure to mix water with water. The method of furrow irrigation can be adopted. It is advisable to pour water into the depth of 2/3 of the ditch, and it is not suitable for flood irrigation; once the soil is tilled or drought relieves after irrigation, it is necessary to pay close attention to cultivating shallow plowing, crushing the soil and cutting off the soil. Capillaries reduce ground gaps and reduce water evaporation.
2. Unable to raise the rapeseed land is not suitable to adopt the "vertical soil" operation at present, such as sloping soil or cultivating roots, etc., otherwise it will accelerate soil water dispersion and exacerbate the occurrence of water shortage and dead seedling phenomenon.
3, spraying drought protection agent.
4. In the paddy field with irrigation conditions, we must pay attention to the middle tillage and weeding, and promote the development of strong seedlings and roots in spring rape, and increase the ability of the root system to absorb and utilize deep soil moisture. Straw, straw, and leaves can also be used to cover bare ground between rows of rapeseed to effectively reduce surface evaporation, increase ground temperature, and suppress weed growth.
Scientific fertilizer
According to the different seedlings of rape and different degrees of drought, scientific fertilization.
1. For the normal growing of rapeseed in time to apply fertilizer. In combination with drought irrigation, according to the previous fertilization, 5 to 10 kg of urea and 1 to 2 kg of potassium chloride should be applied per acre before watering. If the fertilization is applied first, the irrigation effect will be better; if the base fertilizer is not applied with boron, or Insufficient application amount can also spray 0.2kg high-quality boron fertilizer (such as Sonic boron, etc.) in an amount of about 50kg per acre.
2. For rape that is severely affected by drought or weak seedlings, nutrition must be provided in a timely manner. Due to the effect of drought on the application of wax fertilizer, rape is affected by multiple effects of drought, frost damage and malnutrition, and the growth is poor. When rape grows to new leaves, it is timely to use foliar spray to promote rape growth. Foliar spray fertilizer should be in the sunny afternoon, according to 1% urea, potassium dihydrogen phosphate 0.5%, borax 0.5%, 50 kg per acre spray; spray every 5 to 7 days, continuous spraying 2 to 3 times .
3. For rapeseed, the phenomenon of early rot and even early flowering before winter is sure to be serious, and even death will occur. This can be done in the sunny afternoon, cut off the dead stems of the stalks, and then suppress the rape through the timely application of available fertilizer. Reproductive growth, promotion of vegetative growth and branching, and utilization of new branches of rape to reduce yield loss.
4, using human and animal manure water, crushing farmyard manure, pond mud, etc. Sprinkle, shop canola line, not only can play the effect of chase fertilizer, but also has the effect of reducing water loss.
Pest control
Drought and frost damage provide conditions for diseases such as rapeseed mealybug, stem weevil, diamondback moth and aphid, and pests. Special attention should be paid to strengthening prevention and control.
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