Lettuce planting techniques: how to fertilize lettuce in autumn and winter?
How to fertilize lettuce in autumn and winter? Please give guidance on planting lettuce in autumn and winter. You can refer to the following methods for fertilization. 1. Principles of fertilization for lettuce in autumn and winter: (1) increase organic fertilizer, control nitrogen fertilizer, increase phosphorus and potassium fertilizer; (2) fertilizer distribution is mainly based on base and topdressing; fertilizer topdressing is mainly nitrogen fertilizer and rational application of potassium fertilizer; (3) serious acidified vegetable garden, acid soil conditioners such as lime should be applied appropriately; 4. Fertilization should be combined with high-quality cultivation techniques, especially water management, in order to improve fertilizer and water use efficiency. Second, the amount and methods of fertilizer application of lettuce in autumn and winter: (1) the basic fertilizer was applied at a time with mature farm manure 1000kg to 1500kg / mu. (2) the yield level is more than 3500 kg / mu: nitrogen fertilizer (N) 16kg / mu, phosphate fertilizer (P2O5) 7kg / mu, potash fertilizer (K2O) 8kg / mu. (3) the yield level is 25003500kg / mu: nitrogen fertilizer (N) 1416kg / mu, phosphate fertilizer (P2O5) 5kg / mu, potash fertilizer (K2O) 6kg / mu. (4) the yield level is 15002500kg / mu: nitrogen fertilizer (N) 1214kg / mu, phosphate fertilizer (P2O5) 4kg / mu, potassium fertilizer (K2O) 5kg / mu. The acid tolerance of lettuce is very poor, and the vegetable garden soil pH in the south of China.
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Lettuce planting techniques: how to control Sclerotinia sclerotiorum of lettuce?
What are the hazards of Sclerotinia sclerotiorum of lettuce? How to control Sclerotinia sclerotiorum of lettuce? Please introduce the harm of Sclerotinia sclerotiorum of lettuce: after the plant is susceptible, the petiole near the ground first shows beige rot, then the leaves wither, and then the whole plant rotts. When the humidity is high, the disease produces white cotton wool, and later produces black rats inside and outside the stem.
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Lettuce planting techniques: how to sprout lettuce in summer and autumn?
How to sprout lettuce in summer and autumn? What methods can be used to promote sprouting? Please introduce the method of accelerating germination of summer and autumn lettuce can refer to the following list: the temperature range of lettuce seed germination is 5-25 ℃, and germination above 30 ℃ is blocked. The temperature of summer and autumn lettuce is higher when sowing, so the seeds can emerge early by low temperature treatment.
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