Technical specification for pollution-free use of spinach

1. Cultivate disease-free and insect-free seedlings

The main results are as follows: (1) seed selection: spinach varieties with high yield and high quality, disease and insect resistance, strong stress resistance, wide adaptability and high yield should be selected. The seed quality meets the above requirements of the improved variety GB8079-1987. Refuse to use genetically modified spinach varieties.

(2) seed treatment: spinach seed is utricle, the outer layer of pericarp is parenchyma, which can be ventilated and permeable, while the inner layer is corked thick-walled tissue, which is hard and impermeable, and germinates slowly, especially when sown at high or low temperature. Spinach is often used live. When sowing seeds in summer, the pericarp can be broken with wood mortar and soaked in cold water for 10 to 12 hours, then spread in the cellar or hung on the surface of the well to accelerate germination. Sowing seeds at low temperature should be soaked in warm water and sprouted at 15-20 ℃.

2. Pest control after sowing

Spinach is a typical green leafy vegetable, and it is also a typical nitrate-loving vegetable, but in order to ensure the quality of green leafy spinach, reduce the pollution of nitrate and reduce the enrichment of nitrate by green leaves, attention should be paid to the combined application of NPK fertilizer and reduce the amount of N fertilizer.