In the planting technology of zucchini, the planting density should be reasonable, and the later management is very important.

Soil preparation and fertilization: mainly organic fertilizer, mixed with appropriate cake fertilizer, compound fertilizer and plant ash, spread fertilizer on the ground and flatten the ground. Open ditches and make whole beds: use deep ditches and high beds and cover with plastic film. Planting: it was planted in the middle of March, and the seedling age was about 30 days. Temperature: slow seedling stage is not ventilated, increase the shed temperature, promote rooting. Fruit protection: artificial pollination in early spring. Fertile water: timely watering and topdressing. Harvest: grow prosperous and leave more melons, only grow late to pick melons, and weak early harvest melons.

1. Growth conditions of zucchini

The suitable temperature for the growth period of zucchini is about 20-25 ℃. If the temperature is lower than 15 ℃, the growth of zucchini will become slow, and the growth of zucchini will stop when the temperature is below 8 ℃. When the temperature is above 30 ℃, the growth of zucchini will become slow and prone to diseases.

The suitable temperature for zucchini seed germination is about 25-30 ℃. As long as the temperature reaches 13 ℃, it can germinate slowly. If the temperature is about 30-35 ℃, the germination speed is very fast, but it is easy to cause overgrowth.

The suitable temperature for the flowering and fruiting stage of zucchini is about 22-25 ℃, the lowest temperature for root growth is about 6 ℃, and the lowest temperature for root hair formation is about 12 ℃. The fertilized fruit can develop normally when the night temperature is 8-10 ℃.

Zucchini requires moderate light intensity and can tolerate weak light, but it is easy to cause overgrowth when the light is insufficient, and the photoperiod belongs to short-day plants, but the long-day condition is beneficial to the growth of stems and leaves, and the fruiting period is earlier under short-day conditions. Zucchini like to be moist, not resistant to drought, easy to occur virus disease under high temperature and drought conditions, but also easy to cause powdery mildew under high temperature and humidity conditions. Zucchini is not very strict on soil requirements. Sand, loam and clay can all be cultivated, and high yield can be easily obtained in deep loam.

2. Cultivation techniques of zucchini

1. Soil preparation and fertilization

The base fertilizer is mainly organic fertilizer, generally applying about 2000 kg of rotten organic fertilizer, 75 kg of cake fertilizer, 40 kg of compound fertilizer and 80 kg of plant ash per mu. Spread the fertilizer evenly on the ground and flatten the ground after turning 30cm deeply.

2. Open ditches and straighten up the bed

The cultivation method of deep trench and high border and plastic film mulching was adopted. Generally, the width of the border is about 100cm, the height of the border is about 20cm, and the width of the ditch is about 25-30cm. Before covering the film, the border surface should be leveled again and an appropriate amount of herbicide should be sprayed. When covering the film, it is necessary to tighten the cover, so that the plastic film and the border cover stick closely, and the surrounding of the film is compacted with soil. After soil preparation and fertilization as border mulch, 45% chlorothalonil smoke remover was used to smoke at a rate of 1 kg per mu before planting, and the greenhouse was closed for disinfection for 1 week.

3. Colonization

Generally, colonization is carried out in the middle of March every year. When the seedlings have 3 leaves and 1 heart or 4 leaves have just unfolded, the seedling age can be planted in about 1 month. The small varieties were planted in double rows according to the plant spacing of 40 × 40cm, about 1800 plants per mu. The large varieties were planted in double rows according to the plant spacing of 50 × 50cm, about 1600 plants per mu. One day before planting, the seedling bed should be watered thoroughly, strong seedlings and good seedlings should be selected, and the roots should be transplanted with more soil as far as possible. the roots should be stretched normally during planting, and the root water should be irrigated after planting, and the planting holes should be tightly covered with fine soil, and then water once a day until the seedlings survive.

4. Temperature

There is no ventilation in the slow seedling stage, it is necessary to increase the greenhouse temperature to promote the rooting of zucchini. The greenhouse temperature should be kept at about 25-28 ℃ during the day, 18-20 ℃ at night, and ventilation should be carried out properly when the greenhouse temperature exceeds 30 ℃ at noon in sunny days. After seedling retardation, the greenhouse temperature should be controlled at about 20-25 ℃ in daytime and 12-15 ℃ at night, which is more beneficial to female flower differentiation and early sitting. After sitting melon, the temperature should be kept at about 22-26 ℃ in the daytime, 15-18 ℃ at night, and the lowest temperature should not be less than 10 ℃. Increasing the temperature difference between day and night will be more beneficial to the accumulation of nutrition and the expansion of watermelon.

5. Fruit protection

When the temperature is low in early spring, artificial pollination should be adopted. generally before 9 o'clock in the morning, pick the male flowers that bloom on the same day, remove their Corolla, and then gently smear them on the stigma of the female flowers, or you can use plant hormones such as anti-falling hormone and permethrin to operate according to the instructions.

6. Fertilizer and water

According to soil moisture timely watering, if it is found that there is a lack of fertilizer in the later stage, 10-15 kg compound fertilizer per mu or foliar fertilizer can be applied after breaking the film.

7. Harvest

Zucchini to eat young melon-based, to the specifications that can be put on the market should be harvested in time, growing plants should be appropriate to leave more melons, leave melons, and overgrown plants are appropriate late harvest melons. Plants with weak growth should leave fewer melons and pick melons early. Be careful not to damage the main vine of zucchini when picking, and leave the stalk on the main vine as far as possible.