Water floating Seedling raising technique of Cotton

1, seedbed preparation: each seedbed (per mu) to be excavated wide 1. 1-1。2 meters, 20 centimeters deep, 2. 2 meters of ground, flat compaction around.

2, paving film: choose 0. 06-0。1 mm thick film spread on the excavated seedbed, close to the seedbed around, and check whether there is leakage and bubbles.

3. Substrate tray: spray the substrate until it is kneaded into a group by hand, no water flows between fingers, and it can be placed into the seedling tray naturally when falling to the ground, so that the substrate shakes to 1-1 from the disk surface. 5 cm.

4. Preparation of nutrient solution: first mix each bag of special fertilizer with 5 kg of water to prepare mother liquor, pour it into the nursery pool and quickly add enough water to 150-200 kg to prepare uniform nutrient solution.

5. Sowing: sow the treated seeds when the water temperature is stable above 17 degrees Celsius, germinate (bud length cannot exceed the length of a cotton seed) cotton seeds, sow 1 seed per hole to the center of the disk hole, bud tip downward.

6. Cover: Cover 1-1 with substrate. 5 cm flush with the disk.

7. Disinfection: Put the dish into the pool liquid and immediately spray the disinfectant such as carbendazim on the surface of the tray with a sprayer for disinfection.

8, before budding management: generally sunny days only need to cover the morning and evening plastic arch shed, and rainy days must cover the film, but to open both ends of the arch shed, open the tuyere around, to achieve no fog in the film, no water droplets.

9. Management after budding: after seedling completion, do not cover the film day and night without rain, cover the top in rainy days, ventilate around, cover the film in time in case of dense flow or move the tray indoors to prevent freezing damage, and remove the film completely on sunny days to avoid high temperature seedlings.

10. Sparkling seedlings and digging seedlings: After two true leaves, the roots can be left from the nutrient solution for 1-2 hours. Intermittent freezing seedlings can be carried out. According to the growth situation, spraying auxiliary nutrients or DPC (1 g each time) can be used to prevent tall seedlings. And timely control of pests.

1 - 1. Timely transplanting: the suitable transplanting season is 1 - 3 leaf centers, and the row spacing of hybrid F1 is 1-1. 2 meters, plant spacing of 50-60 cm. Transplanting in cloudy days or sunny days after 4 p.m. fresh soil transplanting, and watering live trees.