Recently, a friend of a large planter called and said that the kind of lettuce growing on more than 80 acres appeared hollow. Is it because of the seeds? After transplanting, the grower has not conducted field management such as watering by fertilization, and it is planted after harvesting in front of the plant. The base fertilizer is seriously deficient.
To be sure, this is not a question of seeds. Seed quality generally includes germination rate, germination potential, moisture, purity, and the like. The first three conditions can be manifested in the next species. Since the grower can grow into seedlings, it should be excluded; in terms of purity, the main manifestations are leaf shape, leaf color, rod shape, flesh color, etc., in line with the characteristics of the varieties. Can be considered no problem.
The hollow phenomenon of this lettuce is a physiological disease. The main causes of hollowness are: lack of fertilizer during drought, especially boron deficiency; or strong cold air during the expansion of edible stems, weakening the root activity, decreasing water absorption and fertility, or harvesting too late. Excessive nutrient consumption makes the fleshy stem hollow. The grower neglected management after the transplant. After November last year, there was more than one month of low-temperature and rainy weather. The growth of the seedlings was generally unsatisfactory. In January and February of this year, the rainfall was small, and the seedlings were not effectively strengthened, and the growth and fertilizer management was not effective. During the expansion period, fertilizers and watering are not applied in time to keep the fields moist, and lettuce hollows are easily appeared.
The growers also observed that other people planted lettuce, this hollow phenomenon is not serious. In fact, there are certain differences in cold tolerance, adaptability, and seizure resistance among varieties. In any case, negligence in management is impossible to achieve good economic benefits.
The peasants' friends should pay attention to the fact that lettuce does not need to be certified by the variety. As long as the germination rate, germination potential, moisture, and purity of the seeds are satisfactory, the seeds can be sold. When selecting new varieties, if planting in large areas, planting should be done first.
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