The saliva collection device is also called a saliva collector (saliva collector, Saliva Collection Tube, oral sampling tube). The most convenient sampling method for genetic testing is saliva, followed by blood. Currently, the most popular method is to collect saliva samples for testing. , Compared with blood collection, saliva collection is more convenient and free, and the user's acceptance is also higher.
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2. Scientific Winter Irrigation: Winter wheat timely irrigation, first, can stabilize the ground temperature, form a good soil moisture environment, adjust the soil nutrients in the cultivated layer, increase the heat capacity of the soil, promote plant rooting and more tillers, bred strong seedlings. Second, winter irrigation is not only conducive to preventing freezing and dead seedlings and wintering and protecting seedlings, but also can mitigate the adverse effects of cold damage, drought damage and severe temperature changes in early spring, and is also an important measure to prevent the death of wheat in winter and spring. The third is to sink the soil and eliminate overwintering pests. The fourth is the combination of winter water and winter fertilizer, which can create favorable conditions for the return of spring wheat and root growth, improve production speed, improve quality and increase yield.
3, timely suppression: repression can crush the soil mass, cracks, practical soil, so that wheat roots and soil tightly combined, and spray a new high-fat membrane insulation moisturizing isolation pests and diseases to promote root development.
4. Scientific coverage: Covering wheat with wheat in the winter, covering the ground with wheat, spraying a new high-fat membrane to form a layer of polymer membrane, etc. can deepen the soil depth of the tiller section and protect the blades of the near-ground layer, reduce the evaporation of soil moisture, and improve the birthing festival. The moisture status plays a role in insulation and antifreeze.
Science and Technology of Controlling Dead Seedlings of Winter and Spring Wheat
1. Seedling irrigation: For early cropping wheat fields with insufficient soil moisture, it can be watered during the tillering period. If the soil fertility is insufficient, a small amount of chemical fertilizers can be topdressed to promote seedlings early to facilitate safe wintering. For the management of late-seeding wheat fields, the soil temperature should be increased and the soil moisture should be maintained. The cultivator can use cultivating loose soil and watering should not be carried out during the seedling stage. Otherwise, the ground temperature will be lowered and the situation will be affected.