Common mistakes and countermeasures of wheat autumn sowing

Mistakes are not properly selected. Sowing spring and weak winter varieties in the middle and early alfalfa plots will cause the wheat seedlings to grow long before winter, which is not conducive to safe wintering. Countermeasures: On the basis of early drafting and suppression, the roots of the earth before the winter, or cover the "monticillary manure" to protect the wheat seedlings for safe wintering.

The second mistake was planted too early. The wheat is sowed too early. After the seedlings are unearthed, the leaves are long and narrow, draping, and the tillers are insufficient. The main stem and part of the large stalks enter the two-edge period before the winter spikes. In the winter, when they encounter the low temperature of -10 °C for about 5 hours, Frost damage will occur. Countermeasures: timely suppression, inhibition of the growth of the main stem and big scorpion; timely pressing after pressing, combined with watering, 15 kg of ammonium bicarbonate, if necessary, with 0.2% ~ 0.3% chlormequat solution foliar spray, Control the length of the child, resist frost damage.

The three mistakes were planted too late. Due to the short growth period before winter and insufficient accumulated temperature, the growth of wheat seedlings is weak and there are few tillers. Countermeasures: mainly based on squatting and replenishing hydration, applying 10-15 kg of ammonium bicarbonate in the three-leaf stage; wheat fields with poor soil moisture and fast water seepage, timely pouring water after the three-leaf period (but suitable for soil moisture or soil stickiness, Plots with poor water permeability should not be watered before winter); the last time before freezing, pay attention to the roots of bauxite to protect the seedlings from winter.

The four errors were too shallow. The sowing depth of wheat is 3 to 5 cm, and the seeding is too shallow (less than 3 cm). The wheat seedlings grow, and the tillers are bare, and the tillers are many and small, not drought-tolerant, and susceptible to freezing and premature aging. Countermeasures: Several times before the emergence of the seedlings, after the emergence of the seedlings combined with the roots of the soil, if necessary, in the winter period, the use of soil cover or cover the application of "monticillary manure" to prevent wintering and freezing.

The mistakes five were too deep. The wheat is sowed too deep (more than 5 cm), the emergence is slow, the leaves are slender, the tillers are small and small, the secondary roots are few and weak, and the wheat seedlings are thin and thin. Countermeasure: timely clearing the earth. The method is to use bamboo poles or iron shovel to start from the center of the glutinous rice noodles, and traverse the ridges and ridges. When clearing to the last row, all the remaining soil can be dragged onto the back of the scorpion; It usually starts from the second leaf stage and ends when it comes to "small snow".

The six broadcasts of the mistakes were too large. It is characterized by the crowded growth of wheat seedlings, yellow and thin plants, poor individual development, and few tillers. Countermeasures: Firstly, timely seedlings, especially the “small seedlings” at the head, the ground and the fields, should be sparse and sparse in order to establish a suitable group structure and promote individual development. Finally, watering should be combined with a small amount of nitrogen. Phosphorus quick-acting fertilizer to make up for the excessive consumption of soil nutrients.

The mistake was overdose at the end of the seven. After the wheat seedlings were unearthed, the growth was too strong, the tillers were numerous, the leaves were wide, and the fields were severely covered. Countermeasure: When the main stem of the wheat seedling grows 5 leaves, it is 5 to 7 cm deep in the wheat line, cut off some secondary roots, control nutrient absorption, reduce tillering, and cultivate strong seedlings.

After the error was broadcast, the public sentiment was insufficient. The performance is that the wheat seedlings are difficult to unearth, or the seedlings are slow to be born, the leaves are grayish green, the heart leaves are short, the growth is slow or stagnant, and the leaves of the base gradually turn yellow and dry, and the roots are few and thin. Countermeasure: After sowing of wheat, the soil moisture should be checked in time, and the plots that have been affected by insufficient or drowning will be irrigated with small water, and the conditions of waterless pouring will be suppressed by 1-2 times.

After the nine broadcasts, the soil was too wet. After the wheat seedlings were unearthed, the leaves were light yellow, and the tillers were born slowly. When severe, the leaves tip turned white and dry. Countermeasures: timely in-depth deep-cultivation of dilated sputum ventilation, and a small amount of quick-acting fertilizer, to promote early seedlings.

After the mistakes were broadcast, the seedlings were incomplete. Countermeasures: After the wheat is planted, the emergence of the seedlings should be checked in time. Once the seedlings are found, they should be repaired. The method is: replanting. Select the same variety as the lack of seedlings, first soak seeds, germination under suitable temperature conditions, or soak for 12 hours with 25,000 times naphthaleneacetic acid or 500 times potassium dihydrogen phosphate solution, and then sow to facilitate emergence and growth; plant. For the land that lacks seedlings after replanting and replanting, it can be transplanted on the spot during the wheat tillering stage. The transplanted wheat seedlings should choose strong seedlings with 1 to 3 tillers. The depth of transplanting should be “not to be buried and not to be white”. The time of transplanting should not be later than “small snow” at the latest. Miao and wintering.

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