Fertilizing cabbage leaves is a nutrient storage organ. In order to obtain a hypertrophic leaf ball, we must first have a strong outer leaf and timely fertilize it to promote growth. Fertilizers are usually topped 5 times during growth. Generally in the colonization, replanting, early rosette, rosette late, early ball, ball to the middle; focus on the early ball. Fertilizer concentration and dosage increase with plant growth, drought should be light, with 20% decomposed human excrement, 1000 kg per mu. Rosette period and the ball period, the weather is cold, with 40% of the human excrement 1500 kg per mu. Plant fertilization is inconvenient after ridge closure. Fertilizer can be used, ammonium sulfate 10 kg per mu, or urea 5 kg, increase the use of phosphorus, potassium fertilizer.
Cabbage has a long growing period and requires a large amount of fertilizer. Nitrogen fertilizer is sufficient, with large leaves and dark green color; nitrogen is scarce, leaves are small, stems are thin, and the color is yellowish. In the absence of potassium, the edges of the outer leaves are yellow-brown. Phosphorus deficiency, dark green to purple-green leaves. Calcium deficiency can cause the leaf margins to dry. It is noteworthy that in general, the content of calcium in the soil is not small, but calcium is not easy to operate in the plant. In the case of drought and high soil concentration or water accumulation, it may cause difficulties for calcium absorption by the plant and produce calcium deficiency. Therefore, the weather is dry and the fertilization concentration should be light. In addition, old vegetable fields and red-yellow soils are prone to magnesium and boron deficiency. Deficiency of magnesium between leaves and yellow veins, the symptoms of boron deficiency are the deterioration of the growth point or the formation of new tissue, darkening, destruction of vascular bundles, leaving the parent strain unable to flower.
During the formation of water-irrigated cabbage leaves, a large amount of water is needed, and the suitable humidity is 80% and the soil moisture is 70%. The poor growth of the drought, the delay of the nodule, and even the start of the bale of the heart will re-open the heart, not the heart. The drought must be promptly irrigated, irrigation time, and hot weather should be carried out at night. Cabbage is afraid of earthworms and requires high soil oxygen content. Water should be discharged immediately after it stays in the earthworm for 3 hours, otherwise it will impede root respiration and cause wilting.
Cabbage has a long growing period and requires a large amount of fertilizer. Nitrogen fertilizer is sufficient, with large leaves and dark green color; nitrogen is scarce, leaves are small, stems are thin, and the color is yellowish. In the absence of potassium, the edges of the outer leaves are yellow-brown. Phosphorus deficiency, dark green to purple-green leaves. Calcium deficiency can cause the leaf margins to dry. It is noteworthy that in general, the content of calcium in the soil is not small, but calcium is not easy to operate in the plant. In the case of drought and high soil concentration or water accumulation, it may cause difficulties for calcium absorption by the plant and produce calcium deficiency. Therefore, the weather is dry and the fertilization concentration should be light. In addition, old vegetable fields and red-yellow soils are prone to magnesium and boron deficiency. Deficiency of magnesium between leaves and yellow veins, the symptoms of boron deficiency are the deterioration of the growth point or the formation of new tissue, darkening, destruction of vascular bundles, leaving the parent strain unable to flower.
During the formation of water-irrigated cabbage leaves, a large amount of water is needed, and the suitable humidity is 80% and the soil moisture is 70%. The poor growth of the drought, the delay of the nodule, and even the start of the bale of the heart will re-open the heart, not the heart. The drought must be promptly irrigated, irrigation time, and hot weather should be carried out at night. Cabbage is afraid of earthworms and requires high soil oxygen content. Water should be discharged immediately after it stays in the earthworm for 3 hours, otherwise it will impede root respiration and cause wilting.
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