The peppers grown in greenhouses should focus on the following aspects of management during the growth stage of seedlings:
First, control the temperature: When the two cotyledons of pepper are fully stretched, they can be properly ventilated to reduce the indoor temperature. In general, the seedling temperature should be maintained at 23-25°C during the day and maintained at 15-17°C during the night. Keep 25-30°C during the day and 17-20°C at night. Retarded until after planting, maintain 20-25°C during the day and 12-15°C during the night.
Second, the reasonable thinning: in order to ensure that some vegetable farmers in the whole seedlings, often seeding more, coupled with uneven seeding, easily lead to the phenomenon of crowded seedlings, leading to seedlings grow short, the formation of tall seedlings and weak seedlings. Therefore, it is necessary to establish seedlings at this stage and pay attention to the elimination of seedlings and deformed seedlings. Keeping seedling distance is based on the principle of being uncrowded and shading.
Third, timely split seedlings: When the seedlings grow to two leaves as one heart, it is necessary to timely seedlings, expand the nutritional area of ​​seedlings, improve lighting conditions, and promote lateral root growth. If the seedlings are too late, the seedlings are crowded and prone to leggy. The distance between seedlings should be 6 cm square.
Fourth, fertilizer and water management: Pepper from the seedlings unearthed to the cotyledon unfolded this stage, to control the water, prevent pepper seedlings grow. After easing the seedlings, the seedlings can be irrigated once, and then the soil is cultivated. The cultivating depth is generally 2-3 cm. If nutrients are found to be insufficient, a 0.3% urea or 0.2% ammonium sulfate solution may be applied to the leaves. In the week before planting, depending on the specific conditions, about 1000 kg of organic fertilizer is applied per acre. At the same time, 0.2% potassium dihydrogen phosphate or superphosphate solution can be used for foliar spraying to promote the robust growth of pepper seedlings.
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