A variety of spring spinach can be sown when the temperature rises above 5℃ after the spring, suitable for sowing in March, and harvested 30-50 days after sowing. The varieties should be spring and autumn leaves, Shenyang round leaves and Liaoning round leaves. With late bolting, let's take a look at spinach planting techniques!
Planting environment of spinach
1, temperature: Spinach is a cold-tolerant vegetable, seeds can germinate at 4℃, the optimum temperature is 15-20℃, the optimum temperature for vegetative growth is 15-20℃, it will not grow well above 25℃, and the aboveground part can withstand the low temperature of -6-8℃.
2. Sunshine: Spinach is a long-day crop. Under the condition of high temperature and long sunshine, plants are easy to pick and bloom, and the requirements for sunshine intensity are not high, so they can be interplanted with tall crops.
3. Moisture: spinach leaves have large area, soft tissue and high requirements for moisture. Sufficient moisture, thick meat when growing vigorously, high yield and good quality. Under the conditions of high temperature, long sunshine and drought, vegetative growth is inhibited, reproductive growth is accelerated, and premature bolting is easy.
4. Soil: Spinach has strong adaptability to soil, but it is better to keep water and fertilizer in fertile soil. Spinach is not acid-resistant, and the suitable pH value is 7.38.2. Spinach is a leafy vegetable, which needs more nitrogen fertilizer and appropriate amount of phosphorus and potassium fertilizer.
Planting techniques of spring spinach
The key to planting spring spinach is to strive for early sowing and prevent early bolting.
1. Variety selection: Round leaf spinach with late bolting should be selected for spring spinach.
2. Soaking seeds to accelerate germination: before sowing, soak the seeds in cold water for 65,438+02-24 hours, poke the peel up and down with the handle of a bamboo broom, take them out and put them at 65,438+05-20℃ to accelerate germination (the thickness of the seeds is about 65,438+05 cm, covered with wet sacks and kept moist), and then expose the radicle 3.
3. Sowing: Sowing can be done when the average daily temperature reaches 4-5℃. Apply sufficient base fertilizer and sow by wet sowing method, with the sowing amount of 5-6 kg per mu.
4. Field management: Early management focuses on moisture conservation, less irrigation and light irrigation to prevent the temperature from being too low. After 2-3 real leaves, the plant enters the vigorous growth period, and water and fertilizer should be kept up to prevent premature bolting.
Cultivation techniques of spinach in summer
1. Selecting seeds to accelerate germination: select varieties with heat resistance, easy germination and strong disease resistance, such as round leaf spinach or big leaf spinach. First, the seeds are soaked in broken shells for 12-24 hours, and then put into a well or a freezer at 2-4℃ to germinate at low temperature. You can also spread the seeds in a cool place indoors after soaking to accelerate germination (pay attention to washing them with clean water 1 time every day to wash away mucus and prevent mildew), turn them over frequently and keep them moist, and generally germinate and sow them in 4-5 days.
2. Suitable sowing date: It is generally suitable to sow from mid-May to early June. The sowing amount should be appropriately increased to per mu 10- 15 kg at high temperature. In order to facilitate the seeds to be unearthed one after another, harvested one after another and extend the supply period, two wet seeds soaked and germinated can also be mixed with 1 dry seeds and sowed. Before sowing, select sandy loam with good drainage, and then cooperate with ploughing and apply sufficient fertilizer (apply decomposed high-quality fertilizer per mu 1500-2000 kg). Dig a ditch and build a border the day before sowing, generally the border is 2m wide, and water the soles of feet, and water them every morning and evening before emergence 1 time.
3. Fine management. ? White deer? For spinach sown before, it is best to cover the ground with aquatic plants after sowing. If possible, you can also set up a shed to shade it, and then uncover it after emergence. During the growing period and each harvest of spinach, it is necessary to topdressing the decomposed thin manure water in time, adhere to the small fat water, lightly water and frequently water, keep the soil moist, and reduce humidity and prevent diseases in rainy season.
After reading the planting techniques of spring spinach and summer spinach, let's take a look at the planting techniques of autumn spinach and winter spinach!