Coriander is a cold-tolerant vegetable. It is cold and cool. The growth temperature is 12 °C ~ 26 °C, but the heat resistance is also strong. Coriander is not strict with soil, but loam with high organic matter content is more conducive to the growth of coriander. In the autumn, the coriander grown in the open field enters the growing season, and the management should focus on the “five preventionsâ€.
First, anti weed
Generally, the soil is loosened and weeded 2 to 3 times throughout the growing season. For the first time, when the seedlings were topped with soil, use a small scorpion to gently break the soil loose soil and eliminate the knot layer. At the same time, the unearthed weeds were removed to facilitate the emergence of seedlings. The second time is carried out when the seedling height is 2 to 3 cm, and the strip can be used to properly loosen the soil and combine the weeds. The third time is carried out at a seedling height of 5 to 7 cm. Early weeding can promote the vigorous growth of seedlings. After the leaves are sealed to the ground, no matter whether it is broadcast or spread, the soil is no longer cultivated, but we must pay attention to weed control. At this time, the herbicide can be used for chemical weeding.
Second, anti-burning
If there is more rain, it is very harmful to the coriander that has just emerged. After the heavy rain, it will suddenly turn fine, which will easily lead to the bad heart of the parsley. After the rain, lightly pour the well water, the amount is not to submerge the seedlings, spray a new high-fat film once, can prevent the coriander rotten heart.
Third, anti-twitching
In the autumn, the coriander grown in the open field, although it will not be twitched due to the low temperature in the seedling stage, will be twitched due to long-day sunshine, which requires the selection of coriander-resistant coriander varieties in production. In addition, to strengthen the management of fertilizer and water, it is advisable to pour small water during the whole growth period and water for 5 to 7 times. When topping water, lightly pick up the seedling fertilizer, apply about 10 kg of urea per mu, and then chase urea once every 2 to 3 times of water, 10 to 12.5 kg per mu. Spraying a new high-fat film 800 times once can reduce the occurrence of convulsions.
Fourth, anti-red stalk
The red stalk of coriander, that is, the stem and leaf part of coriander changed from green to red, which reduced the commercial value of coriander, and the purchase price was greatly reduced. In the autumn, the coriander planted in the open field, its stems and leaves will be reddened by strong light, especially when the seedlings are too late (plant height is more than 8 cm). In order to prevent red stalks from coriander, one is early seedlings, and each time a seedling is sprayed with a new high-fat film. In the production, it is better to grow seedlings up to 3 cm high, and keep the plant spacing after seedlings at about 2 cm. The second is to properly cover the shading net according to the lighting conditions. The third is to prevent frost, before the frost comes, spray gibberellin can effectively prevent frost red stalk phenomenon.
Five, prevention of deficiency
Spraying Jintailong fattening treasure, vegetable Zhuanglingling, and new high-fat membrane during the growth of coriander can promote the flow of protoplasts of cells, play a significant green leaf and expand the effect, make the coriander stems thick, the leaves are thick, the leaves are fresh and tender, and the plants are Lush, natural taste is strong. At the same time, it can improve the ability to resist disasters, reduce the amount of pesticides and fertilizers, reduce residues, and prevent physiological and deficiency diseases such as lobular, yellowing, roughening, and rolling leaves.
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