Transplanting in a timely manner, reasonable dense planting

When the rape seedlings have 4 leaves and the seedling age is 30 to 35 days, transplanting begins, generally in late October and early November. Transplanting rapeseed fields can be done without digging fine rice fields or dry land (with no-tillage cultivation). Just "three ditch" (weigou, main ditch and car ditch) and weed removal can be justified. Wide and narrow rows of nests were transplanted in a graded manner. The net width of the plots was 60cm, narrow row spacing was 40cm, and the nest spacing was 40cm. Each nest had two plants (two plants must be separated). The nests were transplanted so that every 667-6600 plants were planted. about. 200cm open-belt round-trip rapeseeds are planted with 2 rows of rapeseed, with a narrow row spacing of 40cm and a nest spacing of 40cm. Each litter has two plants, about 667-3300 plants per plant. For every 667?, 1500kg of manure water shall be used to inject enough manure water.

Deng Wenge reminded that seedlings should pay attention to selecting strong seedlings, and the root system is relatively more developed. 7-10 days after transplanting, seedlings should be checked in time. For the lack of rapeseed, strong seedlings should be used for supplementary planting. After planting, the rooted clearing water should be reused to ensure that the seedlings are strong.

Fertilizer topdressing three good

Deng Wenge said that during rapeseed field management, reasonable fertilization based on seedling growth conditions and different growth periods for the needs of nutrition can play a role in promoting early-onset, stable growth, strong moss, branching, promoting flowering, feeding, grain weight The effect has a very significant increase in production.

(a), Miao Fei. Should be applied early and diligently. Rape, especially hybrid rapeseed, has a strong growth advantage at the seedling stage and requires a large amount of fertilizer. The early winter is an important period for fertilizer demand. The availability of sufficient nutrients at this stage has an important effect on the number of effective branches per plant and the number of pods. In order to meet the nutrient requirements for the growth and development of rapeseed, topdressing should be performed according to different seedling potentials, mainly organic fertilizers. Phosphorus can promote the development of rapeseed roots and enhance resistance. Potassium can improve rapeseed's ability to resist cold, disease and lodging. Therefore, the amount of nitrogen fertilizer should be appropriately reduced when chasing fertilization, so as to avoid the plants being tender and juicy and having poor cold resistance. Generally divided into 2 applications. The first application was made when the rape was returned to green 7-10 days after transplanting to facilitate the growth of seedlings before winter. The method is to apply 500-1000 kilograms of human dung and 2-3 kilograms of urea (or 10 kilograms of ammonium bicarbonate) per mus to make irrigation. For fields with insufficient base fertilizer, poor growth potential, and low-yield fertilizer, the first half of the fertilization period should be followed by another one after another. Urea can be used 4-5 kg ​​(or 15 kg of ammonium bicarbonate, or 600 kg of human waste) pouring water, drought and dry soil when appropriate more than water. Fertilizer should be combined with cultivator and herbicide to cover fertilizer.

(b), wax fertilizer. Waxen has the effect of warming, freezing, and promoting spring hair. It is generally applied in the middle or late December. To delay the effectiveness of manure, mud, cake-based (such as chemical fertilizers, the amount to be controlled to prevent excessive tender), with the application of a certain amount of plant ash, superphosphate, can increase soil temperature 2-3 degrees, play winter spring hair Effect. For example, if the number of green leaves is less than 10 pieces in the middle or late November, organic manure such as pig cow dung or earth miscellaneous fertilizer may be added between the rows of rapeseed. Usually, 100-150 kilograms of plant ash are used in Mushi and 1000-1500 kilograms of pig dung are used. Soil manure 2500-3000 kg (or 900-1000 kg of fire and earth ash); if the seedlings are smaller, they should be applied. Sprinkle around the rhizome of the rape or fill the nest. After the application, loose soil and cover the roots with fertilizer. For example, in the late November, when the number of green leaves reaches 13 or so, the seedlings will flourish, and the dark green color of the leaves may be less or not applied.

(c), foliar fertilizer. Rape before winter foliar spraying phosphorus, potassium fertilizer, can increase the cell liquid concentration, reduce the freezing point and enhance cold resistance. Therefore, during the overwintering period, potassium dihydrogen phosphate, vigor, Huimanfeng and other solutions may be sprayed, and a boron-deficient rapeseed field may be sprayed with a 0.2% borax solution, which is favorable for freezing and seedling preservation.

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