In the process of cucumber seedlings, we often encounter the problem that cucumbers do not emerge for a long time after sowing, or the seedlings are uneven, and the seedlings vary in size. The prevention measures are as follows:
1. Don't blindly rush early: You must wait until the ground temperature stabilizes above 10 ℃ before planting. When the soil temperature is too low, heating measures should be used to increase the seedbed soil temperature.
2. The proportion of nutrient soil should be appropriate: a completely decomposed organic fertilizer must be used, and the proportion of fertilizer should be appropriate. Do not use too much chemical fertilizer to avoid burning seedlings.
3. Irrigation should be even: Too much water in the soil, long-term soaking of seeds in low temperature water will cause the seeds to rot.
Fourth, the bed surface is required to be flat: the thickness of the covering soil should be kept at about 1 cm, and the nutrient soil should be loose and fine. If the seedling bed surface is uneven, the cover soil thickness is uneven, even the seeds are exposed on the open surface, and the cover soil is too thick, it will cause uneven or non-emergence of seedlings.
5. Operate strictly in accordance with the technical requirements of seedling cultivation: the dose of pesticides selected for soil disinfection should not be too large. In addition, the cucumber seeds that germinate after sowing and accelerating germination can generally be seeded 3 to 5 days after sowing.
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China: In accordance with Article 54 of the Food Hygiene Law of the People's Republic of China, Article 28 of the Hygiene Management Measures for Food Additives, Article 2 of the Hygiene Management Measures for Food Nutrition Enhancers and Article 99 of the Food Safety Law of the People's Republic of China, food additives are defined as: Food additives refer to artificial or natural substances added to food for the purpose of improving quality, color, aroma and taste of food and for the purposes of preservative, fresh-keeping and processing. According to GB 2760-2014 National Food Safety Standard for The Use of Food Additives, food additives are defined as "artificial or natural substances added into food for the purpose of improving food quality, color, aroma and taste, as well as for the needs of anti-corrosion, fresh-keeping and processing technology. Spices for food, base agents in gum-based confectionery and processing AIDS for food industry are also included.
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