When is the thinning usually done? What does thinning mean?

The crops sown in the open field should be interspersed twice, the first time is after the seedlings come out, 2-3 seedlings are retained in each stump, and the redundant seedlings are pulled out according to a certain row spacing; the second interseedling is also called fixed seedling, when the seedlings reach 3-4 true leaves. When crop seeds emerge, artificial, mechanical, chemical and other man-made methods are used to remove excess seedlings, which is called inter-seedling.

When is the general time of intersprouting

The main results are as follows: 1. Flowers sown in the open field usually have to plant seedlings twice. The first time is that after the seedlings come out, 2-3 seedlings are retained in each pier, and the redundant seedlings are pulled out according to a certain row spacing. The second time is also called fixed seedlings, which is carried out when the seedlings grow to 3-4 true leaves. In general, in addition to flowers and plants that need to be planted in clusters, an average of one strong seedling is retained, and the flower seedlings under the interval can replace the missing plants.

2. For a small number of transplant-resistant flowers, they can also be planted in other nurseries. Generally, they need to be watered in time after the seedlings are planted to avoid the seedlings loosened in the process of drying up and die. Reasonable close planting is to increase the planting density appropriately without affecting the yield per plant, or under the premise that a certain yield is obtained per plant.

3. Generally, reasonable close planting can coordinate the relationship among panicle number, grain number and grain weight. Close planting is beneficial to increase the number of plants per hectare and ensure a certain number of effective panicles per unit area. Under certain conditions, reasonable close planting combined with appropriate planting measures can make individual development less affected, population development and individual development develop harmoniously, and the product of the three factors that constitute yield reaches a larger value. As a result, higher output can be obtained.

4. Under certain conditions, when the density exceeds a certain range, the leaf area increases to a certain limit, which will lead to shade in the field, lack of light in the plant, but the yield is not very high, and the number of grains per panicle decreases with the increase of density. the 1000-grain weight also decreased, the ear became shorter, the stem became thinner, the bald tip increased, and the grain yield began to decrease.

What does Jianmiao mean

1. Interseedling is also known as thinning seedling, generally sowing in protected area and sowing in open field will exceed the amount of seedling retained, resulting in seedling crowding. In order to ensure sufficient growth space and nutritional area of seedlings, a small number of seedlings need to be pulled out in time, and then strong seedlings are selected to promote adequate air circulation and sunshine between seedlings, and generally timely interseedling and fixed seedlings, which can prevent seedling crowding, mutual shading and save soil water and nutrients. It is conducive to the cultivation of robust seedlings.

2. When crop seeds emerge, artificial, mechanical, chemical and other artificial methods are used to remove the excess seedlings, which is called inter-seedlings. When the excess seedlings are removed, the number of seedlings retained in the farmland reaches the required number of seedlings. There is no need to remove excess seedlings.

3. At the same time, the number of crop seedlings in farmland is basically stable, so inter-seedlings can be divided into broad sense and narrow sense. Intermediate seedlings refers to the elimination of unnecessary crop seedlings, mainly the elimination of unnecessary seedlings. Intermediate seedlings and fixed seedlings are two aspects of the same operation, while fixed seedlings refers to leaving the needed crop seedlings, mainly retaining seedlings.