Lettuce cultivation technology

* 、 Choose medium-late maturity varieties that are not easy to be simmered and resistant to high temperature under long-day sunlight, such as Erbaipi Jieba of Chengdu, and purple scent of Nanjing.

Second, sowing at the right time. Generally, the Yangtze River basin is sown in August and harvested before winter. Seeding too late in colder winter regions results in lower yields and poor quality.

Third, it is hot season when seeding, the seeds are not easy to germinate, it is difficult to raise seedlings, and low temperature should be used to promote germination. That is, the seeds are soaked and placed in a cool place, such as a refrigerator or a cave. As long as about 80% of the seeds germinate after 3 to 4 days under 25 ° C and humid conditions, the seeds can be planted. The seedbed should be watered frequently to keep the soil moist to facilitate emergence.

Fourth, proper planting and strengthening of field management. Autumn lettuce is generally small in plant size and should be increased in density. Use high-fertility soil plots for planting, strengthen fertilizer and water management, promote stem and leaf growth, and avoid early pumping

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