Management of grape sheds after greenhouses
From late November to early December, the grape in greenhouses in Liaocheng has entered the baiting phase one after another. The management during this period is the crucial period for determining whether or not the shed grapes are prolific. Its management measures:
First, slowly warming
Most people believe that only when the temperature rises quickly and germinates early, the grape can mature early and the morning market. Actually, temperature management during the period before germination has a great influence on the growth and yield of grapes. If the horse warms up after the shed, the temperature in the shed rises quickly and the temperature rises slowly, resulting in uncoordinated up and down growth. The flower buds of the grape are not fully differentiated, and even the new shoots fall off when they grow to 20-30 cm. Therefore, this time should be slowly warming up.
In the first week, during the daytime cover, the night was uncovered. Before the sun came out during the day, it was covered with haystacks. After the evening sun fell, it was drafted and kept at 0-7°C.
In the second week, "the draft was drafted 1/3", so that a small part of the sun was shining into the shed, and the temperature was maintained at 5-10°C.
In the third week, "the drafting 1/2" was drafted so that most of the sun was shining into the shed and the temperature was maintained at 8-15°C.
The fourth week of normal uncovering, exposing the grass before the sun came out during the day, after the evening sun set back grass cover, the temperature is maintained at about 10-25 °C.
The grape enters the budding stage, and the greenhouse temperature should be strictly controlled during the day to prevent the shoots from “blinking†and the emergence of irregular shoots. The suitable temperature during the day is 22-28°C and the night temperature is 8-10°C.
Second, smear lime nitrogen or dicyandiamide
After the greenhouses are covered with grapes, the use of lime nitrogen or dicyandiamide to spread grape vines can break the dormancy of the grapes, promote the early sprouting of the grapes, and neat buds.
Grapes per acre with 1 kg of lime nitrogen on a 4-5 kg ​​warm water of 30°C-50°C are placed in a ceramic vessel and kept stirring for 1 hour, striving for uniformity without caking. Use a brush or a small brush to apply the liquid to the shoots, stir the liquid while stirring, and apply the black precipitate on the resulting mother branch to avoid recoating or leaking. If the grapes use lime nitrogen, dry the shoots. Shall be sprayed with fresh water.
Smearing dicyandiamide is relatively simple. After diluting 30-50 times, apply the twigs directly with a brush or a cotton swab.
When treating the resulting shoots with lime nitrogen or dicyandiamide, only the shoot tips 3-4 shoots are generally applied and no treatment is required.
Use cautions:
The cyanamide produced by the decomposition of lime nitrogen is harmful to the human body, and special precautions should be taken when using it.
1. Lime nitrogen (or dicyandiamide) has irritating effects on the eyes and skin. Inhalation can damage the respiratory system. Wear protective clothing, protective shields and gloves when using it. Be careful not to touch the skin directly.
2, can not eat when using, drink and smoke, smoking is strictly prohibited within 24 hours before and after operation.
3, after operation, wash eyes with water, gargle, and carefully clean the face, hands and other exposed parts with soap, clean protective equipment.
4, to avoid contact with pregnant women and lactating women.
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