Cotton seedlings management technology

February 29, 2020

How to cultivate good cotton seedlings, prevent the occurrence of weak seedlings, prevent rot and dead seedlings, ensure that cotton seedlings are unearthed, and grow robustly are the hot spots that most cotton farmers are concerned about. First of all, we should start from the improvement of soil structure, balance of soil pH and scientific soil testing formula fertilization in order to achieve better preventive effect. According to our many years of demonstration experience, the use of biological bacterial fertilizer mixed with nutritious soil to cultivate cotton seedlings can enhance the ability of cotton seedlings to resist cold and disease, improve the ecological environment of the soil, and can inhibit the rot caused by excessive fertilization of seedbeds and heavy soil acidity. The occurrence of seedlings, or madness, can promote the development of cotton seedling roots, and facilitate the healthy growth of cotton seedlings to achieve the purpose of cultivating strong seedlings, and can also effectively control the emergence of cotton blight and yellow wilt disease. The specific approach is to use biological bacterial fertilizer 500g/bag first and mix it with a small amount of organic fertilizer into the soil of the cotton seedbed. The humidity should be controlled between 30-40%. Mix the uniform and produce the cotton bollworm so that it can be sown without spreading the others. Fertilizers or additives.

The second is to regulate the management of temperature and humidity in the seedbed, give full play to the effect of warming and heat preservation of the film, prevent the unfavorable factors of low temperature and high humidity, use scientific and reasonable seedling management skills, and coordinate the uniform growth of cotton seedlings to achieve strong seedling cultivation. Purpose, but also seriously do the following management:

1. The method of raising high-strength and high-humidity should be used in the early stage of growing cotton seedlings. To closely cover the seedbed membrane, can not be opened, the temperature of the seedbed should be maintained at 30-35°C in the first 3-5 days. Even if the temperature reaches 40°C in the short term, it is not possible to remove the membrane and prevent the moisture in the membrane from being dissipated, resulting in a sudden drop in temperature. Misemergence, it is best to give enough water at the time of sowing, and cover the film in time, which is conducive to high temperature and high humidity to protect and cultivate seedlings.

2. After the Qimiao and Changxin New Leaf, the disease prevention and management methods of heat preservation and regular removal of film and seedlings shall be adopted. Suitable temperature for seedbed should be kept at 25-30°C. Excessive high-temperature and high-humidity environment is easy to grow high-legged weak seedlings. At this time, a small vent can be opened on both sides of the shed film every 2.5 meters. It can be sunny in the morning at 10 Afterwards, the two ends of the cotton field film will be opened and ventilated, and the film will be covered after 4 pm. And the use of 漯 王 极 极 极 极 极 极 极 极 极 杀菌 杀菌 杀菌 杀菌 杀菌 杀菌 杀菌 杀菌 杀菌 杀菌 杀菌 杀菌 杀菌 一 一 一 一 一 一 一 一 一 一 一 一 一 一 一 一 一 一 一 一.

3. After 1-2 true leaves of cotton seedlings are present, the seedbed temperature should still be maintained at 15-20°C. To see the occurrence of cotton seedling diseases, after the growth of cotton seedlings is basically robust, the excess and weak seedlings of the cotton seedlings should be removed, and the strong seedlings should be retained to promote the stable growth of cotton seedlings. And the method of cultivating seedlings was used to cover the film. The film was usually peeled off at 9 o'clock in the morning and covered at 5-6 o'clock in the afternoon. After three weeks, the film can be fully uncovered to suit the climate of Daejeon. In the event of strong winds and heavy rains, we must strengthen the protective measures, and use the Wang-Nutritional Nutrient Solution and A.K. Germicide and spray it once more.

4. The bed of cotton seedlings is too long or can be transplanted 10 days before transplanting. The transplanted seedlings can effectively control the height of the seedlings of the cotton seedlings, and can control the excessive growth of the upper part of the cotton seedlings, promote multi-rooted lateral roots, transfer the seedlings, and control the growth of the seedlings. Can also be used for effective nutrition and a K-sterilizer, and then spray once, after transplanting cotton seedlings, showing a short seedling period, rapid survival.

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