What season is Meishan sown in the open field, and when are tomatoes sown in the autumn open field

It depends on what is planted, like rape is sown in early September, and cabbage can be sown from the end of August to the whole winter

1. Planting time of spring tomato: the suitable seedling age for open-field spring tomato cultivation is 50-70 days, that is, sowing should be carried out 50-70 days before planting. For example, in the Shenyang area, which is located at 41 north latitude, spring tomatoes are sown in the protected area in February, and planted in the open field after the late frost in early May.

Spring tomatoes are generally planted immediately after the late frost period in the local area, and the ground temperature of the cultivated layer is 5-10 cm deep and stable through 12 o'clock. For example, the average late frost period in Shenyang is May 2, and the suitable planting period is generally May 6-10. The Yangtze River basin is generally planted before and after the Qingming Festival, North China before and after the valley rain, and Northeast China is generally planted around the beginning of summer.

Planting should also be determined according to the weather conditions, in case of rainy and rainy weather, the planting should be appropriately postponed. Shaanxi tomatoes should be planted early in the suitable planting period, mainly according to the time of planting, there are two seasons a year, one is to delay the cultivation after autumn, and start raising seedlings after July and August, and can be listed in November one after another. One is cultivated in early spring, seedlings are raised in November and February, and they are marketed in May and June.

2. The planting time of autumn and winter stubble: autumn and winter stubble is generally sown and raised from mid to late July to early to mid-August, and planted from mid to late August to early September. The film is buckled from mid to late September to early October, and harvested from late November to early February of the following year.

Autumn celery planting time.

In the north, seedlings are sown from June to early July, planted from August to early September, and harvested from October to November. In the Yangtze River Basin, the seeds are sown from early July to early September, harvested from October to December, and the late sowing is harvested from March to April of the following year, and the winter celery is harvested before the sprouting. It is cultivated in open fields in the Yangtze River basin and in the south, sown in September and November, and harvested from December to April.

It can be cultivated in protected areas in the north.

The time of planting of spring celery.

In the north, seedlings are raised in protected areas from January to March, planted in open fields from March to April, and harvested from May to July. In the Yangtze River Basin, March is the suitable sowing period, sowing too early, after the seedlings receive a certain low temperature, it is easy to pass through the vernalization stage, causing unripe sprouting, sowing too late, and entering the hot summer in the later stage, affecting the yield and quality.

The planting time of summer celery.

Seedlings are raised in the open field after the frost breaks in spring, planted in June to early July, and harvested and marketed in August and September. In the hot and rainy season, summer celery has poor growth, many dead seedlings, low yield, and small planting area.

Celery is suitable for growing in a cool, moist environment and is not heat tolerant, so spring and autumn are the best for sowing celery. But if the temperature can be controlled well, celery can be sown all year round. Before planting celery, it is necessary to promote germination and seedlings, because the shell of celery seeds is thick, and if you sow it directly, the germination rate of the seeds is relatively low.

After about a month of seedling rearing, they can be transplanted.

Seeds are sown in the open field in mid-April --- mid-June.

The cultivation method of carob is as follows:

1. Land preparation and fertilization.

Carob likes deep soil, choose rich in organic matter, the land that has not been planted with carob in the previous year, should be turned 25cm deep before sowing, apply 5000kg of organic fertilizer per mu, 5kg of Bicarda fertilizer as base fertilizer, and then level into a wide small furrow.

2. Sowing and raising seedlings.

The seedlings were cultivated in the open field in late March during the sowing period of carob, and the seedlings were cultivated in the open field in early to mid-April. The sowing amount per mu is about that. Seedlings are generally selected greenhouses, sowing 2 3 grains per hole, watering thoroughly, keeping an eye on heat preservation and controlling the growth.

When raising seedlings, the selected seeds will be blanched quickly with hot water of 80 90, and cold water will be added to cool down immediately, and the water temperature will be kept at about 25 30 for about 4 hours, and then sown after a little drying. After the seedlings emerge, the temperature is maintained during the day 20 25 to ensure that the seedlings grow neatly and robustly. The bed soil should not be too wet at the seed germination stage and seedling stage, so as not to reduce the germination rate, or cause the seedlings to grow in vain, or even rot roots and dead seedlings.

3. Colonization. When the seedlings raised in the nutrient bowl are 2 3 compound leaves, they are planted. Open field cultivation can be planted in late April. Use a hole puncher to make a hole and transplant, water the root water after planting, and fill the fine soil and seal the planting hole.

Generally, two rows of beans are transplanted per furrow, the hole spacing is 20cm, and 5000 5500 piers per mu.

4. Field management.

From transplanting to before flowering, the main focus is on water control, cultivating and promoting roots, and appropriate squatting seedlings are carried out to promote flowering and poding. After the pod, it is necessary to fully fertilize and water to promote flowering and increase pods. After the plant flowering and poding, generally top dressing 2 3 times, 5 15kg of urea per mu or 750 1000kg of decaying human manure, during the peak harvest period, top dressing with water once, 25kg of diamine or 25kg of potassium dihydrogen phosphate can be applied per mu. Reasonable pruning, appropriate selection and retention of side vines, selection and retention of strong growth, the occurrence of the first inflorescence of the early side vines, in which the side vines that grow above the middle of the main vine, after the first inflorescence is extracted, leave 4 5 leaves to top, in order to increase the number of adjacent inflorescences, and promote the good development of inflorescences.

5. Pest control.

The main diseases of bean are root rot and rust. At the same time, at the time of sowing, 1 kg of 50% carbendazim plus 400 500 kg of fine soil should be stirred to cover the seeds, and at the beginning of the disease, the roots should be drenched with 37% root rot 200 300 times or Dixon 1000 1500 times, once in 3 5 days, and 2 3 times in a row. Rust can be sprayed with colloidal sulfur 200 250 times or 15% powder rust rather 150 200 grams of wettable powder mixed with water 75 80 kg.

The main insect pests are pod borer and cowpea pod borer, which can be sprayed once every 7 10 days from the bud to the first flowering period, and spray 2 3 times in a row with 2 3 times with 25% insecticidal double water agent or 50 75 75 with 60 kg of water from bud to early flowering.

1. The sowing season of violets is generally in August and October.

1. Generally sown in the open field in mid-September. It is advisable to choose the single-petal flower as the female parent, because the double-petaled flower lacks pistils and cannot produce seeds.

2. The potting soil should be more moist before sowing, cover a thin layer of fine soil after sowing, no longer water, if the potting soil is dry within half a month, the pot can be placed in half of the water from the bottom of the pot into the moistened soil.

3. Pay attention to the shade after sowing, and the seedlings can emerge in 15 days.

4. Seedlings can be planted in the seedbed according to the row spacing of 6 8 cm, and the seedlings must be carefully pulled out so as not to hurt the roots, and bring soil balls.

5. Before planting, some dry pig and chicken manure should be applied in the soil as base fertilizer. After planting, water is poured enough to fix the roots, shade but not stuffy.

Violet, also known as grass osmanthus and grass violet, is a genus of violets in the cruciferous family.

It is a one- or two-year-old or perennial herb and is one of the famous flowers in Europe. The height of the plant is 20-70 cm, and the whole plant has grayish-white stellate pubescence. The stems are erect and multi-branched.

Leaves alternate, oblong or inverted-lanceolate, 3--5 cm long. The racemes are apical or axillary, the base of the potato chips on both sides is pendulous, the peduncle is stout, the flower diameter is 2 cm, the petals are 4, there are long claws, and the petals are spread out in a cross shape. The flowers are purple red, light red, light yellow, white, etc., slightly fragrant.

The flowering period varies according to the variety, there are spring violets, which bloom in April and May; Summer violet, flowering from June to August; Autumn violets, blooming from July to September. Violets prefer warm winters and cool, well-ventilated summers. It can tolerate a short period of -5 low temperatures in winter and avoid extreme heat in summer.

Fertile, loose and moist soil is needed, and fertilizer should not be applied too much, otherwise it is not conducive to flowering. Sun-loving, long-day plants. Insufficient light and ventilation are susceptible to pests and diseases.

Spring violet propagation is sown in early September and germination temperature is 20. Summer violets are raised in greenhouses in early spring. Autumn violets are sown in late autumn.

Violet is a straight-rooted plant, fibrous roots are not developed, seedlings should be separated in front of the true leaves, and try to hurt the roots as little as possible, with more soil. Double-petaled varieties that are not easy to bear fruit can also be propagated by cuttings or split roots.

The summer sowing time for melons is between August and October, and there is also the option to harvest the seeds in the summer and take place in the spring of the following year.

Specializing in sowing, there are not a few people who sow melons in March. Because it depends on the local climate and the characteristics of the selected melon variety.

Melons are heat-loving crops. During flowering, the temperature in the shed should be kept at 28-30 degrees. If the temperature is too low, it is not conducive to flowering, and if it is too high, it is easy to cause flower and fruit drop.

The most suitable cultivation season for melons in the open field is spring sowing and summer harvesting. Open field direct seeding, the sowing period can be arranged after the late frost and then the seedling season, plastic film cover direct seeding cultivation, sowing period should be slightly earlier than open field direct seeding.

First, the sowing period.

Lettuce is mainly spring lettuce, which is generally sown in September and October of the first autumn and wintered in the open field. In 40-50 days, when the seedlings are planted with 5-6 true leaves, they can safely overwinter in winter, and have enough time to grow leaf clusters after returning to green in the next spring, and harvest in April and May to obtain high yields. There are few vegetables in spring, and the market is optimistic.

2. Cultivate strong seedlings.

Lettuce is easy to transplant because of its small seeds, so seedlings are generally transplanted. The seedbed is selected to retain fertilizer and water, loose and fertile loam, and the manure of the decomposing acquaintance is applied first to turn the ground as base fertilizer. The sowing amount of each seedling is 100-150 grams, and two acres can be planted.

After sowing, cover a layer of fine soil, and then cover the grass flakes to moisturize, after 7-8 days of dew buds, remove the grass flakes, top dressing 2-3 times, apply 50-100 kg of manure or urea kilograms per sub-land, cotyledons are flattened and 1-2 true leaves when each seedling is once a week, water the fertilizer one week before transplantation, each kilogram of urea, and water the day before pulling out the seedlings to avoid pulling out the seedlings and hurting the roots. Large and small seedlings are planted separately to facilitate field management. 3. Transplanting and fertilizing, reasonable and dense planting.

Lettuce needs a large amount of fertilizer, to choose a strong fertility loose loam soil, 3000-4000 kg of manure or garbage per mu, 1500-2000 kg of human manure as the base fertilizer, after turning the ground into rice (even ditch) furrow noodles. Planting density varies depending on the species and season. Early-maturing seeds, row spacing of 18-23 cm square, 8500-12000 plants per mu, late-maturing seeds 25-30 cm square, 7000-8000 plants per mu.

4. Field management.

Spring lettuce to seedlings for winter, slow growth in the early stage, less fertilizer, watering a thin manure water after planting, before winter to control fertilizer water, to avoid growth, enhance cold resistance, safe winter. After the beginning of spring, the stems and leaves grow rapidly, and after entering the rosette stage, the soil is loosened in time, the soil temperature is increased, combined with top dressing once, and 1000 kg of 30% human manure and urine are applied per mu. After the plant is sealed, the hypertrophy of the stem is accelerated, and the amount of fertilizer is required, so the top dressing is applied 2-3 times, with a total of 2000-3000 kg of human feces or 30-40 kg of urea, to ensure the expansion of the stem.

Fertilization should not be applied too late to avoid cracking the stems.

Winters are mild and sunny in the morning.

Lettuce is sensitive to the acidity and alkalinity of the soil and is suitable for planting in slightly acidic soils.

The root system of lettuce is shallow, the absorption capacity is weak, and the oxygen requirement is high, and the soil for planting lettuce is sandy loam and loam.

The soil is the best in this weather and suitable for transplanting.

Harvested in July.

Cucumbers take about 55 days from planting to first harvest in spring and 35 days in summer and autumn. It can be harvested in about 10 days after flowering. That is, the skin color changes from dark green to bright green and shiny, and it is better to harvest when the petals do not fall off.

The first melon should be harvested early, so as not to affect the growth of the subsequent melon, and even hinder the growth of the plant, forming deformed melon and premature plant senescence, thereby affecting the yield.

Good quality cucumber is fresh and tender with white frost, the top flower with thorns is the best, the melon body is straight, uniform and neat, no breaking damage, thin skin and thick meat, fragrant and crisp, no bitterness, no pests and diseases.