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Rape pay attention to fertilization
"Liu Webmaster, can you see if the rapeseed in these fields can also be top-dressed?" On January 9, He Guangxuan, Secretary of the Party Branch of Zhongba Village in Nanjiang Town, Nanjiang County, headed the agronomist and agricultural station of the county agriculture bureau. Liu Xingcheng asked, there are more than 10 villagers present. Liu Xingcheng immediately explained: Now, rape has gradually entered the leper twitching stage, bud twitching to flowering period is a period of vegetative growth and reproductive growth of plants are vigorous, this period is called the double wan period, the main target of this stage is spring Steady growth, promote stem diameter, keep more green leaves, lay a solid foundation for high yield. Rape double-fermented fertilizer absorption period, accounting for about half of the total amount of life, this time a reasonable top-dressing, can receive strong glutinous rice, increase branches, promote flower, Tim grain, full of seed effect. The specific method is to apply nitrogen fertilizer. Spring should be based on the previous fertilization, strictly control the amount of nitrogen fertilizer. For early application of weak seedlings, re-application of available nitrogen fertilizer, after the "spring" will be chase after the application of Mushi urea 5 kg -6 kg, so that their nutrient supply is consistent with the convulsions, turn weak to strong; Slightly applied, when the tenon height 10 cm, Mushi urea 3 kg - 4 kg, to prevent lack of stamina, affect the results of strong seed; Farmyard fertilizers to prevent defertilizer from affecting grain growth. The topdressing of stabilizing fertilizer should be stable. Generally, there are sufficient waxy fertilizers. Due to the low temperature in winter, the land with little effect can be used. The sturgeon fertilizer can not be applied or reduced, and it will gradually exert the fertilizer effect as the temperature rises. Increase potassium fertilizer. The double-peak period is the peak period of potassium absorption in rapeseed. In the early period when potassium is insufficient, it should be increased in the flood season in order to improve the plant's resistance to stress, improve lodging resistance of rape, resistance to pests and diseases, and coordinate rapeseed Grow, increase yield and quality. Generally, topdressing potassium chloride 5 kg -7.5 kg per mu or plant ash 75 kg - 100 kg, potassium soil and rice field rape should also be increased. The time of application is generally appropriate in the middle or late February. Apply phosphate fertilizer. Phosphate fertilizer should be supplemented with fertilizers in the form of extra-root fertilizer. After soaking one kilogram of superphosphate 1 to 1.5 kilograms of water and 50 kilograms of water per acre, the filter residue should be taken for foliar spray. It is usually sprayed twice, with an interval of 5 days to 7 days. Spray boron fertilizer. In the flowering stage of rapeseed, spraying boron fertilizer solution on the leaves can prevent the occurrence of "flowering but not real" and secondary flowers, and has a significant effect on yield increase. Should be sprayed in the flood season and early flowering time, each time 100 grams of borax can be used per mu, watered 50 kg -75 kg spray the positive and negative sides. Borax is generally not easy to dissolve in water. When preparing boron fertilizer solution, a small amount of warm water of 60°C-70°C should be used to dissolve the borax and then add enough water. The borax liquid should be sprayed immediately after it is properly mixed so as not to cause the recrystallization of boron to precipitate for a long time and reduce the effect of boron injection. Spray growth regulators. Wang Miao leaves drape, the organization is soft, due to reduced nutrition and resistance to reduce production. Therefore, Wang Miao must be used chemical regulation, in the convulsions period, can use 15% paclobutrazol 50 grams, watering 75 kilograms of spray, control high and thick, control and strong growth, so that Wang Miao become high yield fields. In addition, when the frond grows at a high speed, in order to slow down the leaf speed and control the growth, a 0.5% solution of chlormequat may also be sprayed.