If farmers plant leeks too densely, it will not only bring a lot of inconvenience to the management of leeks, but also affect the ventilation and light transmission of leeks, affect the tillering of leeks, cause the leeks to "uproot" in advance, and the plants will appear. Premature aging, and leeks are prone to lodging, thus affecting the yield and quality of leeks. Therefore, it is crucial for farmers to plant leeks in a reasonable and dense manner. How to reasonably arrange the planting density of leeks? It is recommended that you start from these four aspects:

(1) Determine the planting density according to the variety

Different leek varieties have different tillering capabilities and different growth styles. After selecting the variety, you should determine the planting density according to the variety. The growth vigor and tillering force are used to determine the planting density. Generally, varieties with strong growth and tillering ability should be planted sparsely, and vice versa, they need to be planted closely.

(2) Determine the planting density according to the planting method

There are two planting methods for leek production, one is through direct seeding, and the other is through seedling transplanting.

①Live broadcast method

Generally, the yield of leeks grown through live broadcast will increase as the sowing density increases, and the plant height of leeks will increase as the sowing density increases. As the density increases, the leaves become longer and narrower. Based on the results of comprehensive yield and main economic traits, the treatment with a sowing width of 10 cm and a sowing amount of 4 kg has the best effect. The seed sowing amount is certain, and it is difficult to achieve good performance if the sowing width is too wide or too narrow, especially if it is more than 20 cm or less than 5 cm. With a certain sowing width, as the sowing amount increases, although the yield will increase to a certain extent, the commercial properties of the product will decrease; under sparse sowing within a certain range, the yield will be lower in the first year, but as the number of tillers increases, the yield will decrease. It has great potential to increase production, and the output will increase rapidly in the second year. Therefore, if you want to sow in one year and harvest for many years, when the sowing volume is large in the first year, you need to eliminate weak plants in the second year in order to obtain higher yields and achieve better economic benefits.

② Seedling transplanting method

With the row spacing unchanged, within a certain range, the yield per unit area increases with the increase of planting density, and the difference between density and density is significant; The plant traits changed significantly with the increase of planting density. The plant height became higher with the increase of density, the leaves became longer and narrower with the increase of density, and the weight of single plant decreased significantly with the increase of density.

(3) Determine the planting density according to different production levels

Under the same conditions, if the production level is high, the soil is fertile, the leeks have strong growth, and the number of tillers is large, it can be appropriately Plant sparsely; otherwise, plant more densely.

(4) Determine the planting density according to the production purpose

If the main purpose is to produce fresh leeks, because the number of harvests for fresh leeks is relatively high, it will have a certain impact on tillers, so appropriate Dense planting is conducive to increasing the yield of commercial leeks. Generally, the spacing between rows is 20 to 25 cm and the spacing between plants is 1 cm. It is better to have 350,000 to 400,000 basic seedlings per acre. If leek roots are the main production purpose, sparse planting is required. , strengthen ventilation and light transmission, which is conducive to the movement and storage of photosynthetic products to the roots; for leek sprouts and seeds as the main production purpose, the number of harvests is relatively small, and the number of small tillering plants increases rapidly, resulting in a rapid increase in the number of basic seedlings, which requires appropriate thinning Planting can improve the bolting rate and seed setting rate. Generally, the spacing between rows is 25 to 30 centimeters and the spacing between plants is 1 to 2 centimeters. It is better to have about 250,000 basic seedlings per acre.