Tobacco root cause
1, the cause of tobacco root is associated with the reuptake of body of tobacco plant n.Under normal circumstances, after the budding of the absorption rate of nitrogen of tobacco plant peaked.Then fell sharply, tobacco mature at the same time.If the remaining nutrients in the soil is more, especially nitrogen nutrient, soil water and vega is suitable for tobacco growth, the growth of tobacco plant tall, tobacco leaves hypertrophy, from the leaf color slants thick, TanQing late, not easily fall yellow.Because of chlorophyll content, the more often the tobacco baking the veins stood out green smoke, dark color and luster is bad, high nicotine content, protein content is high, eat less spicy taste, poor quality of aroma, concentration of aroma, mixed gas, having large, strong excitant.According to research, flue-cured tobacco leaf nitrogen containing 2.43 grams/plant, general, 2-2.3 g/strain in the most suitable, and more than 3 grams/plant is characterized by excessive nitrogen of tobacco plant.
If vega soil moisture is not appropriate, even though the available nutrients in the soil is more, it is impossible to absorb of tobacco plant: when nitrogen nutrient absorption stops, the formation of chlorophyll also then stopped, and reduce gradually and decomposition, the tobacco has fall on mature wong: but when the moisture content increases, the remnants of the nutrients in the soil is easy to absorption of tobacco plant, nitrogen in large absorption cause tobacco root phenomenon again.
2, field illumination or insufficient mature period of rainfall, irrigation, there are paddy fields flooded and appear near the vega vega soil moisture is overmuch, can also lead to tobacco leaves turned green.Tobacco field illumination or cloudy, insufficient to vega state of soil moisture and soil temperature change has a great influence, on the absorption of nitrogen of tobacco plant root has great role in promoting.
In short, the cause of tobacco root is more complex.First is the more residual nitrogen in the soil nutrient and soil moisture is appropriate and cause the increase of nitrogen nutrient absorption: the second is insufficient light field making tobacco plants to leaf nitrogen nutrient transfer in the body.
Tobacco root control measures
1, should be reasonable fertilization, make timely appropriate nitrogen supply.
2, pay attention to during the mature field drainage, accomplish "tobacco plants grow fat strength back.
3, the growing of tobacco plant, the plant leaf color thick, should be delay in multi-topping.When open 4-5 flower, or more multi-topping, consciously make it blossom.Consume more nutrients to tobacco in yellow.
4, the growth of tobacco plant into the late mature, still have a strong ability of nitrogen for vega, and tobacco plants grow stronger, under the condition of time allowed (not under the influence of crop planting and harvesting), after can be in multi-topping, left at the second leaf at the top of a stronger axillary bud, cultivating right to smoke in a timely manner.
5, according to reports, found that the tobacco leaf green variety, can use 50 ml of ethephon adding water 50 kilos in foliar spray.
