Lettuce Cultivation Techniques: How to Fertilize Lettuce in Autumn and Winter?
How to Fertilize Lettuce in Autumn and Winter? Please Give Guidance. For planting lettuce in autumn and winter, you can refer to the following methods for fertilizing. I. Fertilization Principles for Autumn and Winter Lettuce: 1. Apply more organic fertilizer, control nitrogen fertilizer, and apply more phosphorus and potassium fertilizer; 2. The fertilizer distribution method is mainly a combination of basal and topdressing; topdressing is mainly nitrogen fertilizer...
How to Fertilize Lettuce in Autumn and Winter? Please Give GuidanceFor planting lettuce in autumn and winter, you can refer to the following methods for fertilizing.
I. Fertilization Principles for Autumn and Winter Lettuce:
1. Apply more organic fertilizer, control nitrogen fertilizer, and apply more phosphorus and potassium fertilizer;
2. The fertilizer distribution method is mainly a combination of basal and topdressing; topdressing is mainly nitrogen fertilizer, with rational combined application of potassium fertilizer;
3. For vegetable gardens with severe acidification, apply an appropriate amount of acidic soil conditioners such as lime;
4. Combine fertilization with high-quality cultivation techniques, especially water management, to improve fertilizer and water use efficiency.
II. Fertilization Amount and Methods for Autumn and Winter Lettuce:
(1) Apply 1000-1500 kg/mu of decomposed farmyard manure once as basal fertilizer.
(2) Yield level above 3500 kg/mu: nitrogen fertilizer (N) 16-18 kg/mu, phosphorus fertilizer (P2O5) 7-9 kg/mu, potassium fertilizer (K2O) 8-10 kg/mu.
(3) Yield level 2500-3500 kg/mu: nitrogen fertilizer (N) 14-16 kg/mu, phosphorus fertilizer (P2O5) 5-6 kg/mu, potassium fertilizer (K2O) 6-8 kg/mu.
(4) Yield level 1500-2500 kg/mu: nitrogen fertilizer (N) 12-14 kg/mu, phosphorus fertilizer (P2O5) 4-5 kg/mu, potassium fertilizer (K2O) 5-6 kg/mu.
Lettuce has very poor acid tolerance. In southern regions, vegetable garden soil pH<5时，每亩需施用生石灰150～200公斤。
All nitrogen fertilizer is used as topdressing, applied in 3 split applications at 20%, 30% and 50% during the transplanting and greening stage, rosette stage and early rapid growth stage; 40%-50% of potassium fertilizer is applied as basal fertilizer, and the remainder is applied in 2 split topdressings during the rosette stage and early rapid growth stage; all phosphorus fertilizer is applied as basal fertilizer by banding or hole application.
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