Shed room leeks harvest three knife hoe management

In the production of leeks in winter greenhouses, only two knives are generally harvested to facilitate rooting and improve the quality of leeks. However, after the harvest of two knives and leeks is completed, some vegetable farmers will continue to produce three knives in order to increase their economic efficiency. The author believes that the three-knife production of leeks in winter sheds depends on the specific circumstances and must not be blindly harvested. Otherwise, it would be counterproductive. To determine the number of reasonable harvested pods to increase economic efficiency, consideration should be given to the following aspects for reference:

1. Age of colonization and growth of the year. In the first year of fresh leeks, less root growth and less nutrient storage are not suitable for multiple harvests, and 1 to 2 knives should be preferred. 2 to 4 years of leeks, strong growth, strong tiller, stem and disk storage of more nutrients, according to the growing situation of the year, can harvest 2 to 3 knives. For more than 4 years old root leeks, their absorption and storage functions have been greatly reduced, and it is recommended to reduce the number of harvests in order to facilitate rooting.

2. Market demand and price changes. If there is a large market demand in this season, and the supply of leeks is in short supply and the price is good, then in order to achieve higher economic benefits, it may be considered to harvest three knives. On the contrary, after the harvest of the two-leaves leek, the market outlook is not optimistic: supply exceeds demand, fewer merchants, slow sales, price instability, it is recommended to stop the production of three knives, should be based on rooting.

3. Soil fertility. The increase in yield of leeks in greenhouses is inseparable from their excellent soil environment. If the soil is fertile, deep and rich in organic matter, it has strong water retention and fertilizer retention and good ventilation, it can meet the nutritional needs of continuous growth of Chinese chive. On the contrary, if it is sandy soil, it is easy to dehydration and de-fertilization, blindly increase the number of harvesting, the lack of nutrient absorption in roots leads to the growth of thin leeks, yield and quality decline.

4. Add organic fertilizer. Organic fertilizer contains a variety of nutrients needed for crops, which is a complete fertilizer and has a unique effect on improving soil and fertility. Moreover, under the semi-closed state of greenhouses, a large amount of carbon dioxide can be released during the decomposition of organic fertilizers and become an important source of photosynthesis. Therefore, organic fertilizer is an indispensable fertilizer if it is harvested and stabilized, and the number of harvested pods is increased.

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