In order to speed up the transformation and upgrading of the seedlings, seize the summer grain and oil harvest, combined with the actual production, put forward the March wheat and rape field tube technology plan for local reference.
First, small wheat field tube technology
1, scientific topdressing joint fertilizer. Application of jointing fertilizer is the most effective measure to ensure the percentage of spikes and increase the number of grains per panicle. It is the most crucial part in capturing the harvest of wheat. It is necessary to strive to apply top-dressing fertilizer for all wheat. For small populations of wheat seedlings, light green leaves, weak soil fertility, or no green space, the joint fertilizer was applied in early March. For large-scale wheat seedlings, deep-leaved leaves, strong soil fertility, or plots that have been topped with green manure, top-fetching joint-fertilizers will be applied between the mid-March or mid-to-basic 1-2 knots. According to the yield level, soil fertility basis and previous fertilization, the number of topdressing fertilizers should be reasonably determined to ensure the rapid growth of wheat after jointing and the need to build a high-yielding population. Under normal circumstances, topdressing urea 7.5 kg per mu.
2, control of pests and diseases. To control wheat sheath blight, aphids, spurts mainly. Rhizoctonia solani can use 12.5% ​​of the wells of wax bud AS (mycobillimus) 150 ml, or 20% of Jinggangmycin WP 50 g per mu, and 25% of pytrazolone WP 24 g or 3% can be used per mu. Dimethoate EC 60g sprays evenly on 30kg of water.
3, defense against cold damage. The low temperature of about 0°C after the jointing of wheat may cause freezing damage. Pre-irrigation of drought-fed wheat fields before the onset of the cold weather ensures that there is adequate moisture and can reduce the damage caused by cold damage. After the occurrence of frost damage, timely application of quick-release fertilizer or foliar fertilizer, such as a mixture of urea and potassium dihydrogen phosphate, or American Star, rich potassium, and fulvic acid foliar fertilizer, can promote the recovery of wheat.
Second, rape field management technology At present, the rape is at the bud stage, to meet the water and fertilizer conditions of rape growth, not only can increase the number of leaves, leaves grow large, but also can promote the development of the lower leaves of axillary bud components, increase rapeseed yield.
1, chase Shi Lei moss. According to the degree of seedlings and frost damage, a suitable amount of nitrogen fertilizer, phosphorus, and potassium fertilizers can be topdressed before 10 cm in height. Generally, topdressing urea 10 pounds per acre, diammonium phosphate and potassium chloride 4 pounds each. In the weak growing fields, nitrogen fertilizer may be applied more early, and good growing fields may be used appropriately. Boron fertilizer is of great significance in preventing rapeseed from "flowering but not real". For the basal fertilizer without applying boron fertilizer or insufficient application amount, it can be sprayed before bolting to flowering (the latest no more than the initial flowering period). .2% borax solution 50-75 kg. Spray on a sunny day before 10 o'clock in the morning or at 4 o'clock in the afternoon. Spray in case of rain within 36 hours after spraying. In particular, the effect of applying boron fertilizer on cottonseed rape and rapeseeds is better.
2, control of pests and diseases. After the temperature rose in March, it could easily lead to downy mildew in buds. When the downy mildew strain rate reaches more than 10%, 58% of metalaxyl can be used. Manganese zinc WP500 times or 50% carbendazim 200 g/mu, spraying once every 7-10 days, continuous control 2-3 times. The early rapeseed blossoms pay attention to the prevention of rapeseed sclerotinia disease. Each acre can use 40% sclerotia net WP 100 g, 50% carbendazim 200 g or 25% chlorpromazine EC 50 ml, and mu water consumption is not less than 30 kg.
3. Spray foliar fertilizer. Foliar spray fertilizer has the advantages of fast absorption, strong effect, low dosage, and good yield increase effect. Spraying foliar fertilizer is of great significance for strengthening crop nutrition, rapidly supplementing nutrients, alleviating adverse environmental impacts, preventing deficiency symptoms, and making up for lack of crop root absorption. Rapeseed generally suffers from freezing injury and leaves are severely damaged. Affected by continuous drought, soil moisture is generally insufficient, root absorption capacity is reduced, and fertilizer absorption and supply are affected. It can be sprayed with “American Starâ€, “Zhuangfuxing†or “Fujika†and other foliar fertilizers to enhance the vitality of plant roots, promote the development of the root system, increase the absorption capacity and the ability to resist waterlogging, and can reduce the freezing point when used for spraying leaves. To improve the antifreeze ability, it is helpful to restore the function of the frozen leaf, generally using 50ml of leaf sprayed with American Star or Zhuangfuxing 60ml per mu.
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