One of the mistakes: improper selection of species. The sowing of spring and weak winter varieties in the Zhonghua and Zaoxian plots will cause the wheat sprouts to prosper before the winter, which is not conducive to safe wintering.
Countermeasures: On the basis of early demarcation and repression, pre-winter soil shall be used to encircle the roots, or a cover shall be applied to “protect the head of manure†to protect the wheat seedlings from wintering safely.
The second mistake: sowing too early. The wheat sowing was too early. After the seedlings were unearthed, the leaves were narrow and long, and the pods were lacking. The main stem and a part of the big buckwheat were differentiated before the winter and the spikes entered the two-legged stage. In the winter, when the temperature was about -10°C and sustained for about 5 hours, Freezing damage will occur.
Countermeasures: timely repression, inhibition of the growth of the main stems and large maggots; pressure after the timely scratching, combined with watering, Mushi ammonium bicarbonate 15 kg, if necessary, with 0.2% ~ 0.3% chlorophyll solution spraying, Control leggy, resist freezing injury.
The third mistake: sowing too late. Due to the short growing period before winter and the insufficient accumulated temperature, the growth of young wheat seedlings is thin and the number of tillers is small.
Countermeasures: Mainly use paddling and replenishing water, and apply 10 to 15 kg of ammonium bicarbonate in the three-leaf stage; soil in the soil with poor moisture content and fast water seeps, and pour water in time after the three-leaf stage (however, suitable moisture or soil moisture, Poorly waterlogged plots should not be watered before the winter); the last time it is ploughed before freezing, it is necessary to pay attention to the soil surrounding the roots in order to protect the seedlings safely overwintering.
The fourth mistake: sowing too shallow. Wheat sowing depth of 3 ~ 5 cm is appropriate, sowing shallow (less than 3 cm), the growth of young wheat seedlings, tiller section exposed, more than small tiller, not drought, susceptible to frost and premature aging.
Countermeasures: Squeeze a few times before emergence, combine the roots of the soil after the emergence of seedlings. If necessary, cover the soil with a cover soil or cover the “headed manure†during the wintering period to prevent overwintering and freezing.
Five mistakes: sowing too deep. The wheat is sown too deep (more than 5 cm), the emergence is slow, the leaves are slender, the tillers are small and small, the secondary roots are weak, and the wheat seedlings are thin.
Countermeasures: Timely clearing the earth. The method is: using a bamboo rake or shovel to start from the center of the sampan surface, along the ridge to cross the ridge, when cleared to the last line, the rest of the soil will be dragged to the back of the rake; for the appropriate sowing of wheat, the pre-winter qingke It usually starts from the two leaf stage and ends when it is "small snow".
Six mistakes: too much broadcast. The performance of wheat seedlings is crowded, the plants are yellow, thin, weak, and their individual development is poor, with few tillers.
Countermeasures: First, sparse seedlings, especially in the fields, fields and fields, should be sparse and sparse in order to establish a suitable group structure and promote individual development; combine watering, topdressing with small amounts of nitrogen and phosphorus. Quick fertilizer. To make up for the excessive consumption of soil nutrients.
Seven mistakes: excessive base fertilizer. After the emergence of wheat seedlings, the growing trend is over-prosperous, with more tillers, leaf blades, and severe field closure.
Countermeasures: When the main stem of wheat grows 5 leaves, it is 5-7 cm deep between the rows of wheat, cut off some secondary roots, control nutrient absorption, reduce tillers, and cultivate strong seedlings.
Eight mistakes: Insufficient lyricism after sowing. The performance of wheat seedlings is difficult to produce, or after emergence, the birth is slow, the leaf color is grayish green, the heart is short, and the growth is slow or stagnant (the masses call it "mineral heart"). The base leaves turn yellow and dry, and the roots are small and fine. .
Countermeasures: After sowing wheat, timely check the soil moisture, affect the lack of moisture or "dry" impact on the emergence of the plots, there are irrigated conditions for small-water irrigation, water-free conditions of timely suppression of 1 to 2 times.
Nine mistakes: After the broadcast, the soil was too wet. After the wheat seedlings were unearthed, the leaves were pale yellow and the tillers were born slowly. When they were severe, the tips of the leaves became white and dry.
Countermeasures: Timely deep cultivating ventilation, and applying a small amount of quick-effect fertilizer to promote early-onset seedlings.
The tenth error: Incomplete emergence after sowing.
Countermeasures: After the sowing of wheat, timely check the emergence of seedlings. The method is: 1 replant. Choose the same variety as the lack of seedlings, first soaking seeds under suitable temperature conditions, germination, or soaking for 2 hours with 25,000 times naphthaleneacetic acid or 500 times potassium dihydrogen phosphate solution, and then sowing, to facilitate emergence and growth; 2 Transplanting. For land patches that are not ready for replanting and replanting, there is still a lack of seedlings that can be transplanted and planted on the spot in the wheat tillering period. Transplanting wheat seedlings should be selected with strong seedlings with 1 to 3 tillers, and the depth of transplanting should be “not buried on the ground and not exposed on the groundâ€, and the transplanting time can not be later than “little snow†to facilitate growth. Seedlings and wintering.
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