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With the gradual lowering of temperature, many vegetables are transferred to the shed for production. At this time of the year, there are often farmers and friends who consult about the fertilization and management of greenhouse vegetables. Here, Xiaobian reminds the farmers to manage the shed. Not upside down."
Watering and transplanting
Can't reverse
Many vegetable farmers are used to first spreading organic fertilizer in the shed, then applying fertilizer, then ploughing, leveling, ridge planting seedlings, and finally watering. This makes it easy for the roots of vegetable seedlings to come into contact with the fertilizer, causing root burning, water loss, or ammonia poisoning. If the water is first transplanted and then transplanted, when the fertilizer is dissolved and diluted by water, it is not easy to cause gas damage, and it is not easy to cause root loss due to root burning.
Therefore, it is recommended to first water the sputum, then plant the seedlings, and then use the amino acid humic acid fertilizer solution to fill the roots, pay attention to 7 to 10 days of irrigation, and even 3 to 4 times. Vegetable growers can also mix superphosphate, calcium magnesium phosphate fertilizer with farmyard manure, which is not only safe, but also good in fertilizer efficiency.
Application amount of phosphorus and potassium
Can't reverse
The ratio of phosphorus to potassium in the formation factors of melon vegetables is 1:2 to 3, and the utilization rates are 20% to 30% and 50% to 70%, respectively. Therefore, in the process of fertilization, it is necessary to pay attention to the application of potassium fertilizer and rational application of nitrogen fertilizer and phosphate fertilizer. This is especially important after sitting on the melon fruit. The phenomenon of partial application of diammonium phosphate must be avoided, and it is necessary to properly apply the biological fertilizer. To regulate the supply of nutrients.
The order of controlling pests and diseases, nutrition regulation and watering can not be reversed. If watering is in front, and pest control and nutrition regulation are in place, then on the one hand, the plants have excessive vegetative growth, lack of reproductive growth, light knots, thin leaves, The stalk is fine, and the heavy one falls and the fruit falls. On the other hand, due to the increased humidity in the shed after watering, it is easy to cause the growth of pathogens such as Phytophthora, Pythium, Downy mildew and the like, resulting in aggravation of the disease. Therefore, it is necessary to first use drugs to prevent pests and diseases, use inhibitors to regulate growth, and then water and fertilize.
Principles for the application of organic fertilizers and fertilizers
Can't reverse
First of all, organic fertilizer must be the main factor, supplemented by chemical fertilizer; secondly, organic fertilizer must be decomposed. Application of unfertilized organic fertilizers such as chicken manure, with a large number of salts and pests, such as sodium chloride, Phytophthora, nematodes, etc., increase the difficulty and cost of pest control.
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