Post-disaster management of cotton swabs

Cotton has a strong physiological compensation and regeneration ability. Generally, after the disaster, as long as the management is strengthened, a good harvest can still be obtained. Integrating local experiences, managing post-disaster cotton, it is timely and focused on science. Its main technical measures are:

1. Timely cultivating loose soil After loosening the soil, it is easy to cause the panel knot, the ground temperature drops, so that the normal physiological activities of the root system are inhibited. The cultivator and air conditioner must be carried out as soon as possible to increase the temperature and ventilation, and control the dead seedlings to promote early-onset hair growth; especially the saline-alkali soil cotton fields , It should also be timely soil loosening to prevent backlogging.

2. Apply topdressing nitrogen fertilizer timely and timely fertilizer, can improve the nutritional status of cotton plants, so that on the basis of the restoration of growth as soon as possible, to promote the growth and development of the later, to compensate for disaster losses; general land, can be applied urea 5 ~ 7.5 kg or 13 to 15 kg of ammonium bicarbonate. When top dressing, the fertilizer should leave the cotton plant 10~13 cm to prevent root burning.

3. In time, the insecticide-treated cotton plantlets are tender and young after the disaster. The early stage insects are more susceptible to insect pests such as cotton bollworm and cotton planthopper. They must be treated early and cured to ensure that each leaf must be protected. It is necessary to fight; if necessary, it can be used to fight locusts in the early stages of budding of cotton plants.

4. After the scientific pruning of affected cotton plants recovers and grows, they tend to grow long, with five strands of hexafurcation, which is not conducive to the emergence of a bell, and must be reasonably pruned. For cotton plants with intact cores and broken leaves, early removal of axillary buds and madness is required to ensure the growth of the top heart; the top core is damaged, leaving only the residual cotton leaves and a few fruit branches of the cotton plant, which can be selected on the top of the main stem. Leave 1~2 buds to replace the growth of the top of the heart; before and after budding, the cotton plants that have been cut off and become light stems can retain 1~3 robust sprouts in the upper part of the main stem. If a cotton plant suffers from a locust plague near flowering, due to the limited growth season, it is better to stay strong and stay strong early. After most of the new shoots began to bud, the invalid buds were removed in time, and the tops were properly towed early to win more effective bells.