1. Ventilation in the field. It is necessary to dip the permeable water to facilitate the seed germination and emergence, and to ventilate, so that the seedlings can grow rooted, thus effectively preventing rotten cockroaches. The practice is: first make the field tiller fine, start the ditch to do the sputum, apply the base fertilizer, break the mud surface of the glutinous surface, and initially smash it; then soak it in water, and further smooth the smeared surface.
2. Plan for breeding. Master the appropriate sowing date and determine the appropriate age to avoid rotten sputum. The temperature required for normal emergence of rice is 15 °C. Therefore, it is advisable to start sowing when the temperature rises steadily to about 12 °C in the open field. If the breeding season is early, the temperature is low, the rice seedlings grow slowly, and the age of the seedlings should be appropriate. When the temperature is high, the rice seedlings grow fast and the age of the seedlings should be shorter.
3, dilute broadcast uniform. The amount of sowing in Putian should be determined according to the length of the age and the temperature of the breeding season. In principle, it is required to spread the sowing so that each seedling can get enough sunshine, air and nutrients to achieve strong growth. If the seeding is too dense, it will reduce the amount of light received by the seedlings in the later stage, affecting the carbon assimilation, reducing the rooting power, and the seedlings are not strong and easy to rot. Generally speaking, the small seedlings within 20 days of spring rice fields are planted with 180-200 kilograms per acre; the large seedlings of about 30 days old are planted with 80-100 kilograms per acre.
4. Cultivate strong and strong. Cultivating Zhuangzi is the basis for high yield of rice and a prerequisite for preventing rotten sputum. Wet breeding methods can be used to cultivate age-appropriate sputum. In the stand-up period, generally only water is poured in the Putian ditch, and the field is kept moist and ventilated, instead of irrigating the surface of the water, prompting the seeds to quickly stand up. During the rooting period, it is necessary to have a flexible grasp of the water layer and prevent frostbite. Keep the water in the field and ventilate it to protect the seedlings. In case of cold wave attack, deep water should be used to protect the seedlings, and timely drainage and ventilation should be required. In the face of rain and rain, find the drain, do not make water in Putian. Cultivating strong and preventing rottenness is inseparable.
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