Tobacco is one of the main economic crops in China(black plastic nursery pots). It has a large area and high yield. It is of great significance to control the fertilizer requirement of tobacco and fertilization technology to increase tobacco production, reduce losses and increase economic benefits. The growth period of tobacco is 160-180 days, and the seedbed period is about 60 days(seed propagation trays). It is divided into emergence stage, cross period, rooting stage and seedling stage.
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Tobacco is both a potassium-producing crop and a chlorine-free crop(1 gallon nursery pots). It requires more potassium and prefers nitrate-nitrogen fertilizer, but it is not suitable to apply chlorine-containing fertilizer. Tobacco requires different amounts of fertilizer during different growth stages. The understanding and seedbed stage require less fertilizer before the cross period(18 cell seed starting trays). After that, the amount of fertilizer needs to increase gradually after the cross period.
(bulk buy cheap 15 gallon plastic pots)The period of heavy fertilizer absorption is 45 days to 75 days after transplanting(spill trays). The absorption peak is in the cluster and bud stage. During this period, nitrogen absorption is 44.1% of total nitrogen uptake, 50.7% of phosphorus and 59.2% of potassium. The absorption of various nutrients gradually decreased(20 cell seed starting trays). After the topping, due to the secondary roots, the nutrient absorption increased again, which was 14.5% of the total absorption.
The amount of fertilizer needed is the most in the 15 days before transplanting(plastic pots for plants wholesale). The amount of nitrogen absorbed during this period accounts for the total amount of nitrogen absorbed by the seedbed. 68.4%, phosphorus 72.7%, potassium 76.7%. However, at this time, the soil contained too much nitrogen, which easily caused the black smoke(40 cell seed starting trays). The field period is 100 to 120 days, and is divided into a slow seedling period, a rooting period, a prolonged period, and a mature period.
In general, tobacco seedlings have a short time, requiring fast growth and strong seedlings(plastic nursery pots). The characteristics of fertilization are that the base fertilizer is required, and the top dressing is uniform and timely. Generally, every 10m2 can be used for high-quality manure or pig manure 100-150 kg, and potassium sulfate compound fertilizer is 0.5-1 kg(50 cell plug flats). If conditions permit, it can also apply cake fertilizer and dry chicken manure. In general, seedbed top dressing should be chased after light chasing.
Not to be baked(50 cell seed trays). According to the characteristics of fertilizer needed for tobacco to be rich and rich, old to poor, and long to become fertilized by fertilizer, it is necessary to re-apply the base fertilizer, apply fertilizer early, and grasp the opportunity to topdress. Combine the arable land with ridges and piles of 3,000-4,000 kilograms of manure(perlite suppliers), 100-150 kilograms of cake fertilizer, and 30-40 kilograms of 51% pure sulfur-based compound fertilizer.(bulk buy cheap 15 gallon plastic pots)
Each time, 10-15 kg of high-nitrogen and high-potassium compound fertilizer is applied per acre(grow bag wholesale price), the first time is 10 days after planting, and the second time is 20-25 days after planting, not later than 30 days after planting. Top dressing can be applied to acupoints or ditch, and the depth of fertilization is 10-20 cm(105 cell seed starter trays). Too deep and too shallow is not conducive to the absorption and utilization of tobacco plants. In the field stage, the nutrients were absorbed less within 30 days after transplanting.
The dosage is from small to large, and the concentration is light to thick(72 cell seed starter trays). When four leaves and seven leaves are used, each is topdressed once. At this time, the absorption of nitrogen, phosphorus and potassium accounted for 6.6%, 5.0% and 5.6% of the total absorption during the whole growth period(105 cell propagation trays). Topdressing 1 or 2 times, one-time topdressing can be applied to 5 to 6 leaves, 4 to 20 kg of high-nitrogen and high-potassium compound fertilizer (potassium sulfate type).(bulk buy cheap 15 gallon plastic pots)