Winter Farming Meeting
Cotton seedlings refer to the inconsistency of the growth and development of cotton plants in the same cotton field, and there are differences in height, thickness, leaf size, etc. If this phenomenon is not properly managed, it will affect the yield and quality of cotton, so it is necessary to analyze the causes in time and take corresponding measures. Here are some of the reasons that can lead to the development of cotton-sized seedlings::
1.Seed quality: The quality of cotton seeds directly affects the uniformity of emergence. If the seed quality is not good, such as low germination rate, low purity, poor fullness, etc., it will lead to uneven emergence of seedlings, thus forming large and small seedlings. The formation of large and small seedling seed quality link is very critical, the current reminder of the majority of cotton farmers for the current purchase of Xi seeds, must check the crushing rate of commercial seeds, whether the size is consistent, when conditions can also measure the germination test.
2.Sowing quality: Sowing quality is also an important factor affecting the uniformity of cotton seedlings. If the sowing depth is inconsistent, the thickness of the covering soil is uneven, and the sowing density is too large or too small, it will lead to uneven emergence of seedlings and the formation of large and small seedlings. Especially in the cotton field where the land preparation is too early, the soil preparation is too hard, and the soil under the film forms a large compaction after sowing, which is not conducive to the emergence of seedlings, and the virtual soil of land preparation is too thick, and the cotton field is not neat when it is not formed into a solid cotton field, and the cotton seedlings are not neat, which brings difficulty to the field management work.
3.Soil fertility: Uneven soil fertility can also lead to the production of cotton-sized seedlings. If there is a large difference in soil fertility, it will lead to inconsistent growth and development of cotton plants, and the formation of large and small seedlings. The root cause of this problem is still the problem of the drip irrigation system, such as low-pressure operation, or the blind pursuit of large water intake, drip irrigation with dripper spacing is too narrow (less than 30 cm), or the dripper flow is too large (greater than 2.).6）。There is also a lack of zinc or other medium and trace elements, and cotton seedlings are also prone to uneven growth.
4.Water management: Improper water management can also lead to the production of cotton-sized seedlings. If the dripping water is uneven, or extreme weather such as drought and waterlogging, it will lead to inconsistent growth and development of cotton plants, and the formation of large and small seedlings. Generally speaking, in the spring in low temperature and rainy weather, if the quality of the drip seedlings is not good or not timely, the moisture of the seedbed is inconsistent, and it is easy to form large and small seedlings.
5.Pests and diseases: During the growth of cotton, if it is attacked by pests and diseases, it will also lead to the production of cotton seedlings. Some pests and bacteria can directly harm the growth of cotton plants, resulting in dwarf plants and yellowing of leaves. If the black aphid and cotton thrips damage in the cotton seedling stage will cause the uneven growth of cotton seedlings, the size of the seedlings is common.
6.Other problems: too much residual film in cotton fields, herbicide use problems, and large and small seedlings should be formed in cold weather in spring.
The following measures can be taken for the causes of cotton seedlings:
1.Select high-quality seeds: Choose high-quality seeds with high germination rate, high purity, and good fullness to improve the uniformity of seedlings.
2.Improve sowing quality: clean the field in time before sowing, reduce large soil and residual film, pay attention to sowing depth, soil thickness, sowing density, etc., to ensure sowing quality.
3.Uniform fertilization: According to the soil fertility status, reasonable fertilization is applied to ensure uniform soil fertility.
4.Scientific irrigation: According to the weather conditions and the needs of cotton growth, scientific dripping water is carried out to ensure that the moisture is uniform.
5.Strengthen the prevention and control of pests and diseases: strengthen the monitoring and control of pests and diseases, and take corresponding prevention and control measures in a timely manner to reduce the harm of pests and diseases to cotton plants.
6.Other field management measures: timely seedling chemical control, late water intake, the implementation of seedling control technology, or some accelerated growth of fertilizers and technologies can inhibit the size of seedlings.
In short, the production of cotton seedlings is the result of a combination of factors. To solve this problem, it is necessary to take comprehensive measures to improve the uniformity of cotton seedlings and the level of growth and development from the aspects of seed quality, sowing quality, soil fertility, water management and pest control.
**Editor: Tianshan Plant Protection,**Please indicate the source!