Key points of management of plastic film garlic returning to green

1. The key to purify the surface of plastic film and increase the light transmittance of garlic is the temperature, and the main management in this period is to improve the ground temperature. For garlic covered with plastic film, the mulch on the film, such as leaves, completely dead garlic leaves and dust, should be removed as soon as possible to purify the film surface in order to increase the transmittance and raise the ground temperature. The damaged plastic film should be repaired in time to increase the heat preservation and warming effect and promote the garlic to turn green as soon as possible.

two。 Open ditch garlic root system is not resistant to moisture, encountered spring rain field water, easy to cause rotten roots, in case of drought will also affect the normal growth of garlic. Ditches must be opened so that water can be drained and irrigated in case of drought. At the same time, we should do a good job of cultivating soil and choking roots.

3. Timely removal of weeds, warming temperature is beneficial to the growth of weeds, weed growth can not only compete for soil nutrients, but also break the plastic film, seriously affecting the growth of garlic. Weeds should be cleared in time and weeds should be eliminated in the young stage.

4. To strengthen the management of fertilizer and water, garlic covered with plastic film can be irrigated and topdressing at noon after waking, combined with irrigating 25 kg of nitrogen, phosphorus and potassium compound fertilizer per mu. Do not flush ammonium bicarbonate or urea. After irrigation, ploughing should be done in time to raise the soil temperature and protect the roots and seedlings. In case of special drought, one watering can be carried out in late March, in principle, do not water too early, otherwise it is easy to cause disease or secondary growth of garlic. Then carry on the shallow hoe to loosen the soil, raise the temperature and preserve the soil moisture. If the yellow tip phenomenon appears in the leaves of Ching Ming Festival, the second topdressing should be carried out in time, and the watering times should be increased in time, generally every 10 to 15 days to promote plant growth.

5. Strengthen the prevention and control of diseases and insect pests and improve the stress resistance of garlic

Due to the influence of air temperature, in order to prevent the occurrence of diseases and insect pests of garlic, garlic can be sprayed on a sunny day in the afternoon after turning green at the end of March to promote early rooting, prevent spring cold and improve its resistance to stress. Protective drugs were used for the undiseased plots, protective and therapeutic drugs were used for the diseased plots, and fungicides, plant growth regulators and foliar fertilizer were sprayed once, such as Yingtian No. 2 450 times liquid to promote the healthy growth of garlic. The serious disease land should put an end to early watering and postpone the watering time according to the weather and soil moisture, so as to provide a good environment for garlic root regeneration and cultivate robust plants.