What are the planting techniques that need to be mastered for high-yield fall lettuce?

Lettuce is a relatively common vegetable, the main food is fleshy tender stems, can be eaten raw, cold, fried, dried or pickled, in addition to the young leaves can also be eaten, rich in protein, fat, calcium, phosphorus, iron, vitamins and other nutrients, often eaten can be diuretic through the breast, strong body, anti-cancer and anti-cancer role, has a high nutritional value, then to plant a high yield of autumn lettuce need to What planting techniques to master? Next together to see it!

1, variety selection

Lettuce meet 22 ~ 24 ℃ above the high temperature and long sunshine, then quickly flower bud differentiation, and autumn lettuce seedling is often in this conducive to the moss under the conditions of the moss, so you must choose the high temperature and long sunshine reflect the more sluggish in the late maturity varieties.

Generally the pointed leaf shoots are more late-maturing and more heat-resistant in the seedling stage.

2, determine the sowing period

Autumn lettuce from sowing to harvest about 3 months, suitable for autumn lettuce stem and leaf growth of the appropriate temperature period is in the average ten-day temperature drop to about 21 ℃ about 60 days after the period, so the seedling period to the arrangement of the average ten-day temperature drop to 21-22 ℃ when the first month of the safer, the sowing period is too late, although you can avoid the moss of the undercooked draw, but due to the Short growing period, low yield, and late susceptibility to frost damage.

Generally optional in late July to early August sowing is more appropriate.

3, seed low-temperature treatment

Lettuce seed germination temperature 15 ~ 20 ℃, summer sowing garden temperature is high, the seed germination difficulties, before sowing the need for low-temperature treatment.

Methods include: (1) soak in cool water for 5 to 6 hours, remove the water, put in the light at 15 to 16 ℃ to germinate, after 2 to 3 days, germination up to 60% can be sown.

(2) put in 0 ~ 4 ℃ refrigerator freezing 4 ~ 5 hours, at 15 ~ 16 ℃ temperature in the light of germination.

3) Put the soaked seeds in a cloth bag and hang them on the water surface of a deep well, and sow the seeds after showing buds for 2 to 3 days.

(4) or choose the seed coating agent mixing seeds to protect the righteousness, you can choose chlormequat chloride . Fosfomycin, or cotrimoxazole coating seed mixing.

4, seedling management

Seeds can be sown in a nutrient bowl or seedbed, it is appropriate to set up elevated shade or hanging shade nets after sowing, seedlings should not be too dense to prevent futile growth.

5, planting and management

It is advisable to choose fertile topsoil, water retention of strong plots, is planted before the application of adequate fertilizer.

Planting should be transplanted in the afternoon with soil, seedling age of about 25 days, the longest not more than 30 days, strict selection of seedlings, elimination of long seedlings, the density of 20 to 26 cm square is appropriate, after planting pouring root water, drought watering a re-watering to ensure the survival of uncooked moss, fertilizer supply should be sufficient, especially nitrogen fertilizer to accelerate the occurrence of leaves and leaf area expansion, generally after slowing down the seedling, the regimentation of the period, when the stem began to expand The stems began to expand when each of the fast-acting nitrogen fertilizer, while adding appropriate amount of potash in the last time, more to promote stem hypertrophy.

In short, lack of water and fertilizer is one of the important reasons for autumn lettuce moss, must pay full attention.

6, the rational use of growth regulators

The use of plant growth regulators to inhibit the uncooked moss.

The stem of lettuce sealing began to hypertrophy with 500 to 1,000 mg/kg green solubilizer or 6,000 to 10,000 mg/kg Bijou spray foliar, can effectively inhibit the moss increased stem weight, but note that it can not be used in the seedling period.

In summary, if farmers and friends want to plant a high-yield good quality fall lettuce, we need to master the correct planting techniques and scientific field management methods, I hope this article can help you.

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