When does the annual trailing herb zucchini grow? (pollution-free planting technique in winter and spring)

Zucchini contains more nutrients such as vitamin C and glucose, which has the effects of eliminating annoyance and relieving thirst, moistening the lungs and relieving cough, clearing heat and diuresis, reducing swelling and dispersing knots. Zucchini fruit as a vegetable is cultivated all over our country. So, when does the annual trailing herb zucchini grow? What is the benefit? What pollution-free planting techniques should be mastered?

When do you usually grow zucchini?

The sowing time of zucchini in autumn and winter in greenhouse is usually sown in mid-December and set in mid-January of the following year; it is generally planted in March every year. Zucchini is a kind of melon vegetables that is more resistant to cold but not tolerant to high temperature. The optimum temperature during the growing period is 20-25 ℃.

II. Pollution-free planting techniques of zucchini

The planting of zucchini in the greenhouse mainly includes autumn postponement, winter and spring stubble and early spring stubble. Because zucchini in winter and spring can catch up with the market during New Year's Day and Spring Festival, its economic benefit is also relatively high. Zucchini is cultivated in winter and spring, usually sowing and raising seedlings in mid-December, planting in mid-January of the following year, harvesting around early February and ending in mid-late May. This zucchini is one of the earliest melon vegetables on the market in early spring, which mainly supplies the off-season market in early spring, which not only fills the gap in the market, but also enables vegetable farmers to obtain higher economic income from it.

1. What are the environmental characteristics of zucchini cultivation in solar greenhouse in winter and spring?

Zucchini seedling stage is in time for winter, the temperature is low, the light is not sufficient, it is necessary to use different means to increase the temperature and supplement the light. The planting period is the weakest period of light throughout the year, the light intensity decreases, after planting, the external temperature gradually rises, from the use of heat preservation and lighting measures to the use of cooling, day and night ventilation measures, until entering the natural conditions.

2. What is the main direction of pollution-free production of zucchini in solar greenhouse in winter and spring?

The main results are as follows: (1) to cultivate strong seedlings of suitable age under the condition of low temperature and low light.

(2) ventilation and outgassing.

(3) often adjust the plant to grow in one direction, so that the leaves are distributed reasonably and receive light evenly.

(4) in the middle and later stage of growth, the old and diseased leaves in the lower part should be removed in time to make them ventilated and transparent.

3. How to raise seedlings of zucchini in solar greenhouse in winter and spring?

The seedling period is when the external climate is getting cold to cold, so the varieties with cold resistance, disease resistance, high and stable yield should be selected.

Specific cultivation techniques:

The main results are as follows: (1) when selecting seeds, we should choose seeds with the same size, uniform color, full seeds, high seed purity, high germination rate and no diseases and insect pests.

(2) the nursery bed should be appropriately high. Select the area with the best light conditions in the greenhouse. The border should be smooth. Nutrition bowls or soil blocks can be used to raise seedlings. If there are conditions, in order to ensure that the seedling bed has a higher temperature, it is best to use electric hotbed to raise seedlings.

(3) pour the bottom water well. Sufficient water after sowing is beneficial to the emergence of seedlings.

(4) the temperature should be high after sowing, so that the seedlings can be unearthed quickly, and the seedling bed can be covered with 1 layer of plastic film for heat preservation and moisturization. after most of the seedlings are unearthed, the plastic film will be removed.

(5) after the emergence of all the seedlings, pay attention to strengthen ventilation and reduce the temperature in the greenhouse to avoid excessive temperature in the seedling bed and the occurrence of blight and sudden collapse. (6) watering should be carried out on a sunny morning to avoid the phenomenon of retting roots at low temperature.

(7) for raising seedlings in a seedling bowl, in order not to shade each other, the seedlings should be poured, the area of the nutrition bowl should be expanded, and the seedlings should be adjusted to the parts with better temperature and light conditions, so that the growth of all seedlings is the same.

(8) hang reflective film to increase temperature and moisturize.

(9) the seedbed should be covered with a small arch shed to prevent the harm of cold current.

(10) the seedlings were refined 5-7 days before planting, 20-23 in the day, 12 at night and 8 in a short time, in order to improve the adaptability of the seedlings and ensure that the seedlings had enough ability to resist the external environment.