What are the breeding techniques and matters needing attention of broccoli?

Broccoli is a kind of vegetable with high nutritional value, which can be seen in shopping malls and vegetable markets. The demand for broccoli is so great, raising seedlings and planting is also the concern of many vegetable farmers, what are the breeding techniques and points for attention of broccoli?

I. Seedling techniques of broccoli

1. Get the seedbed ready. In order to raise broccoli seedlings, the first step is to prepare the seedbed, and the seedbed should be in the loose soil with good drainage, ventilation and rich organic matter. Fields that have not grown cruciferous vegetables in the past two years are also required. The seedbed should be arranged, disinfected and weeded, and the humidity and temperature should be adjusted.

two。 Sow seeds. Broccoli seedlings are generally raised by the method of fine sand mixed with dry seeds and the seeds of broccoli are evenly sown on the arranged seedbed. The most suitable time to sow is sunny evening or cloudy day. After sowing, spray water with a fine sprinkler to keep the seed border in close contact, and then cover the border with 2 or 3 layers of sunshade net to cool and moisturize.

3. Seedbed management.

The main results are as follows: (1) it takes two to three days from sowing to emergence of broccoli, which requires attention to adjust the temperature and moisture. During the germination period, sunshine and field moisture should be observed three times a day in the morning, afternoon and evening.

(2) the period from cotyledons turning green to 2 leaves and 1 heart is the basic nutritional stage of broccoli seedlings. at this stage, poor root growth and absorption and high temperature in the seedling bed can easily lead to poor seedling development. During this period of time, it is necessary to set up a sunshade net in time to cool down from 8 am to 4 pm. Drainage should be done in time after rain.

(3) after the 2-leaf and 1-heart stage, the seedling entered the period of rapid growth, and the temperature still needed to be relatively high at this stage. In order to cultivate strong seedlings, it is necessary to give priority to management to prevent typhoons and torrential rains, preferably the management of land humidity.

II. Matters needing attention in raising seedlings

1. Soil. Broccoli is suitable for planting on sandy loam with good drainage and irrigation, deep plough layer and loose and fertile soil.

two。 Temperature. Broccoli grows at temperatures between 5 and 20 degrees Celsius, and the higher the temperature, the faster it grows. The temperature of germination is 20 to 25 degrees, and the temperature of seedling growth is 15 to 20 degrees.

3. Moisture. Broccoli needs more water in the growth process, especially in the growth process, water must not be lacking, if too little water will affect the yield.

4. Fertilize. The root system of broccoli is relatively shallow, the demand for nutrients is more, so it needs to apply base fertilizer. Generally, 100 kg of organic fertilizer, 10 kg of urea, 25 kg of compound fertilizer and 2 kg of borax should be used as base fertilizer per mu.

5. Pest control. If there are Plutella xylostella and Chilo suppressalis in broccoli, 5% fipronil 1500 times solution can be used to control broccoli. If beet armyworm and Spodoptera litura are found, 20% rice full 1000 times solution plus 10% cypermethrin 1500 times solution can be used to control. If aphids are found, 3000 times of imidacloprid can be used to control aphids.

The cultivation of broccoli is not complicated, and it is also very popular in daily life. It can be stir-fried or cold. It is a delicious and nutritious food.