The latest course of spinach planting techniques and methods in greenhouse

Spinach is one of the most common vegetables, also known as Persian vegetables, spinach, spinach, parrot vegetables, red root vegetables, dragon vegetables, etc., is an annual herb of spinach belonging to Chenopodiaceae, originating in Iran, now all over the world, all over China are widely cultivated, with extremely high cultivation value, let's take a look at the greenhouse spinach planting technology!

cultivation environment

Spinach belongs to cold-resistant vegetables, seeds can germinate at 4℃, the most suitable temperature is 15 ~ 20 ℃, the suitable temperature for nutritional growth is 15~ 20 ℃, the growth is poor above 25℃, the aboveground part can withstand the low temperature of minus 6~8℃, the sunlight intensity is not strict, the water requirement is high, the water is sufficient, the meat is thick when growing vigorously, the yield is high, and the quality is good. It has strong adaptability to soil, but it is still good to keep water and fertility. It is not acid-resistant. The appropriate pH is 7.3~8.2. It needs more nitrogen fertilizer and appropriate phosphorus and potassium fertilizer.

selection of species

Spinach seed morphology can be divided into two varieties of thorn species and thornless species, thorn species fruit diamond thorn, leaves smaller and thin, halberd or arrow shape, because of soft texture, less astringent taste, suitable for eating (pointed leaf type), cold resistance and heat resistance is strong, early maturity, early sprouting. Thornless seeds have irregular round, thornless fruits, plump, wrinkled, oval or irregular leaves, short petioles, weak heat resistance, late sprouting, suitable for winter cultivation. In the cultivation process, varieties suitable for early spring greenhouse cultivation such as Boza 58, Boza 18, Omnipotent and Boza Guanneng can be selected.

soil preparation and fertilization

After harvesting autumn vegetables, do not remove the film, directly fertilize, prepare the soil, make the bed, generally apply 3~5 tons of high-quality fully decomposed farm manure, 20~25 kg of diammonium phosphate, 10 ~15 kg of potassium sulfate or 40~50 kg of 45% ternary compound fertilizer per mu, and make a flat bed with a width of 1~1.5 meters.

germination seeding

Soak spinach seeds in cold water for about 12 hours a day before sowing. Rubbing the mucus, taking out and draining, then sowing or germinating at 15 - 20 DEG C, sowing after most seeds are white in 3 - 4 days. Generally in early December sowing, sowing in the flat surface evenly sprinkle seeds, sowing depth in 1~1.5 cm, and then step again, step after watering thoroughly. It's best to drill. The row spacing is 8 - 10 cm. Generally, about 4 kg of pure seeds are sown per mu.