Spinach is widely cultivated in China and is a very common vegetable. Spinach is cold and cold, not resistant to high temperatures and glare. Generally, spinach varieties are difficult to grow normally when they exceed 25 °C. Therefore, it is difficult to plant spinach in summer, and the weather is hot, watering, fertilization, etc. Summer spinach is usually planted in May-July, and harvested from late June to mid-September. The following small series will talk about the high-yield planting techniques and management points of summer spinach.
1, variety selection
Planting summer spinach should choose a heat-resistant spinach variety and have a high adaptability to the soil.
2, soaking seeds and germination
Spinach seeds have a very low germination rate when the temperature reaches 30 °C. It is recommended to soak seeds and germination.
Method: It is recommended to soak seeds in well water for 1 to 2 hours, then germination at 10 °C ~ 15 °C. After 3 to 4 days, most of the seeds can be germinated.
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3. Soil preparation and fertilization
First of all, we must apply the base fertilizer and do the sputum after the soil preparation. It is recommended that the line spacing be 15 cm, and the shallow groove of 2 cm deep should be spread in the ditch evenly. The plant spacing is 5 (single grain) to 10 cm (double grain) and the soil is 1.5 to 2 cm. Watering after sowing. After 8 to 10 days, water is poured once, and then water is poured 2 to 3 times depending on the situation.
4, sun and rain
Because spinach is not resistant to glare and high temperatures, it must be shaded in summer. First, you can choose a greenhouse cooling agent to reduce the temperature of the shed, and then pay attention to shading, using a shade net with a shading rate of 50% to 75%, and shading every day from 10 am to 5 pm.
5, prevention and control of pests and diseases
Summer spinach is susceptible to downy mildew, anthracnose, spot disease and viral diseases. Downy mildew can be controlled by anti-virus WP or nail cream. Anthrax can be controlled with carbendazim or pyraclostrobin. Spot disease can be controlled with thiophanate-methyl suspension. Viral disease is controlled with amino oligosaccharides. The main pest of summer spinach is the leaf miner, which can be controlled by high-efficiency and low-toxic systemic drugs.
The above is the high-yield planting technology and management points of summer spinach. Spinach has strong adaptability to soil and high temperature, so pay attention to shading. And it is rainy in summer, pay attention to timely drainage after the rain to avoid spinach roots.
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