Key points of cultivation techniques of baby vegetables in greenhouse

Key points of cultivation techniques of baby vegetables in greenhouse

With the rapid development of China's economy, people's living standards are constantly improving. Consumers have higher requirements for the quality and quality of vegetable products. Because the baby dishes are crisp and tender, the dishes are thin and sweet, the taste is delicious, and the edible rate is high. At present, it has become one of the main vegetables favored by consumers. Naturally, it has become the main crop and vegetable for the majority of growers.

1 Variety selection

Suitable varieties should be selected according to different seasons. Spring sowing should choose bolting resistant varieties with better cold tolerance, such as Gaoli Yu doll, mini star, etc., while summer sowing should choose disease resistant varieties with good heat tolerance and early heart, such as Rebeibei and heat resistant 55 varieties. Autumn seed is not very strict on varieties. No matter which season it is cultivated, attention should be paid to the varieties with fast pericarp, symmetrical growth, thick top and bottom, good quality, good flavor and strong disease resistance. in addition, they are also suitable for the needs of the local market.

2 temperature requirement

Because baby cabbage is a variety of Chinese cabbage, which is a semi-cold-tolerant vegetable plant. The suitable temperature for growth was 5 ℃ ~ 25 ℃, the optimum temperature for seed germination was 25 ℃, the optimum temperature for leaf and bulb growth was 15 ℃ ~ 20 ℃, and the growth was slow at 10 ℃. If the temperature was lower than 5 ℃, it was easy to freeze, hold the ball loose or unable to hold the ball, and more than 25 ℃ was susceptible to virus disease.

3 fertilization

Because of its small plant, small root system and short growth period, Baby vegetable is cultivated with sufficient base fertilizer and 10 ~ 15 kg compound fertilizer per mu as base fertilizer. Calcium superphosphate can be increased by 15 kg in calcium deficient or alkaline soil so that the plant can absorb calcium. During the whole growing period, topdressing should be combined with irrigation, and a small amount of available nitrogen fertilizer should be applied as seedling fertilizer at seedling stage. Plant growth enters the continuous cropping stage, which requires more fertilizer supply. Urea, potassium sulfate or ternary compound fertilizer of 10 kg per mu or 20 kg of ternary compound fertilizer can be applied for 1 ~ 2 times, and 0.2% potassium dihydrogen phosphate is sprayed twice on the leaf surface. In the late heading stage, topdressing can be carried out according to the plant growth.

4 watering

Seedlings are generally not irrigated, if drought can be watered frequently, keep the soil moist, rosette early stage appropriate water control squatting seedlings, squatting seedlings after the end of timely irrigation to prevent drought, affecting the water demand of plant growth. Continuous cropping period is the peak period of plant water demand, but it is not suitable for flood irrigation, small water should be watered frequently, so that there is no water on the ridge surface, and the root system is not short of water, so as to avoid overgrowth of plants, resulting in excessive air humidity and breeding diseases. Stop watering a week before harvest.

(5) Disease and pest control

5.1 Diseases. Although the growth period of baby vegetable is short, it is prone to diseases if it is not managed properly. The common diseases are anthrax, downy mildew, soft rot and so on. Anthracnose and downy mildew can be controlled by Diesen zinc and anthrax Fumei wettable powder, and soft rot can be controlled by agricultural streptomycin and antidote alum, and the pesticide concentration should be used according to the instructions, spraying once every 7 days for 2 ~ 3 times.

5.2 insect pests. The damage to Plutella xylostella is serious, especially in spring sowing stubble, attention should be paid to the control of low instar larvae. 1.8% avermectin EC 2 500 ~ 3 000 times, 5% pyrethrin EC 1 000 ~ 1 500 times; aphids are fumigated with 350 g / mu of aphid lice, or alternately sprayed with 20% cypermethrin EC and 10% imidacloprid wettable powder 1 000 ~ 2 000 times.