Causes of prosperous wheat before winter Premature sowing of pre-winter accumulated temperature is an important reason for the pre-winter wheat flourishing. With the increase of warm winter years and the popularization of semi-winter breeds in various regions. The idea of ​​seeding wheat, with early autumnal equinox, late frost, and cold wheat seeding, gradually became the mainstream. The proper sowing date should be determined according to the degree of winter nature of the variety, the size of the sowing volume and the climate characteristics of the current year. Robbery and early sowing is the main reason for the formation of pre-winter seedlings. Between September 2004 and September 2005, the rainfall was between 30-40. Many plots were planted at the end of September and early October to sow the crops. In addition, the autumn and winter temperatures are high, and the pre-winter accumulated temperature Far more than the effective accumulated temperature needed to form strong seedlings, Wang Miao is formed.
Excessive seeding causes the pre-winter group to be too large and it is also easy to form vigorous sprouts. Affected by late planting of wheat and increased yields of some weak tillers, some farmers blindly increased the amount of sowing, even if the varieties with strong tillering ability are in proper time, the sowing amount is not less than 35-40 pounds, and some plots Even up to 50 pounds.
Excessive amount of nitrogen fertilizer led to prosperous winter. The use of urea or ammonium bicarbonate as the base fertilizer for wheat causes the pre-winter wheat leaf pods to thrive and even grow in size, resulting in the formation of large populations of vigorous seedlings. In the past two years, the area of ​​straw returning has been expanding year by year. To speed up straw rot, the amount of fertilization per mu should be applied to 20 kg of urea or 50 kg of ammonium bicarbonate per mu. The amount increased to 35 pounds of urea or 100 pounds of ammonium bicarbonate, and even 150 pounds of ammonium bicarbonate, resulting in an increase in plots before the prosperous winter.
Warm winter and winter are the most important factors leading to the growth of wheat before winter. In November-December 2004, the temperature remained high and the weather was warmer. It did not cool until after the snowfall on December 21, and some wheat fields, especially the timely wheat planted between October 5 and October 10 and the end of September and early October, were planted. The robbers sowed early sowing wheat, more than before the winter tiller, over-prosperity formed Wang Miao. The pre-winter greater than 0°C effective accumulated temperature reached above 850°C, which was more than 200°C suitable for pre-winter suitable accumulating temperature of wheat, resulting in long super-wide leaves of Wangmiao and 7-8 leaves of main stem.
The pre-winter prevention and control measures of wheat are based on the climatic characteristics of the region for many years, and the varieties with strong winter characteristics are selected to minimize the planting area of ​​weak winter varieties and strong spring varieties.
Appropriate late sowing, to minimize the pre-winter prosperous due to early sowing and warm autumn and winter climate. According to the winter nature of the variety, the sowing date can be determined sooner or later. The strong winter varieties can be sown several days in advance, and the semi-winter breeds can be sown several days later.
Scientifically determine the amount of seeding. According to the level of soil fertility, the type of tillering power, the sowing date of scientific determination of the amount of sowing sooner or later, do a good job of precision and semi-precision sowing, reduce seed waste, reduce the probability of formation of vigorous seedlings before winter.
Do a good job of scientific and rational fertilization, coordinate the proportion of N, P, and K fertilizers, but apply N fertilizers in some amounts, use conditional acceptable soil tests to apply formula fertilizers, reduce the blindness of fertilization and the waste of fertilizers.
Due to early sowing, a prosperous wheat field was found. After the wheat seedling was delivered, it could be pressed in time according to the situation, and the wheat seedlings were subjected to certain damage through pressing, which temporarily delayed the growth of wheat.
For the less prosperous wheat fields, deep plowing can be used to control the growth. The time was selected for deep cultivating on a sunny afternoon before and after the start of winter, and the depth was about 10. Through deep ploughing to cut off part of the root system, weakening the plant's absorptive capacity inhibits the growth of the aboveground part.
For wheat fields that have a serious trend of jointing, the repression can be carried out in the sunny afternoon after the end of childbirth and before the large freeze. This makes some wheat seedlings injured and prosperous.
In addition, attention should be paid to the prohibition of livestock infestation in wheat fields that are very prosperous, because the livestock indigo will uproot many wheat seedlings and cause many of the seedlings of the seedlings to be exposed. In winter, a large number of wheat seedlings will be frozen and die.
Author: Wuqiao County Farm Bureau Zhaofeng Juan Source: Northern agricultural Weekly
Excessive seeding causes the pre-winter group to be too large and it is also easy to form vigorous sprouts. Affected by late planting of wheat and increased yields of some weak tillers, some farmers blindly increased the amount of sowing, even if the varieties with strong tillering ability are in proper time, the sowing amount is not less than 35-40 pounds, and some plots Even up to 50 pounds.
Excessive amount of nitrogen fertilizer led to prosperous winter. The use of urea or ammonium bicarbonate as the base fertilizer for wheat causes the pre-winter wheat leaf pods to thrive and even grow in size, resulting in the formation of large populations of vigorous seedlings. In the past two years, the area of ​​straw returning has been expanding year by year. To speed up straw rot, the amount of fertilization per mu should be applied to 20 kg of urea or 50 kg of ammonium bicarbonate per mu. The amount increased to 35 pounds of urea or 100 pounds of ammonium bicarbonate, and even 150 pounds of ammonium bicarbonate, resulting in an increase in plots before the prosperous winter.
Warm winter and winter are the most important factors leading to the growth of wheat before winter. In November-December 2004, the temperature remained high and the weather was warmer. It did not cool until after the snowfall on December 21, and some wheat fields, especially the timely wheat planted between October 5 and October 10 and the end of September and early October, were planted. The robbers sowed early sowing wheat, more than before the winter tiller, over-prosperity formed Wang Miao. The pre-winter greater than 0°C effective accumulated temperature reached above 850°C, which was more than 200°C suitable for pre-winter suitable accumulating temperature of wheat, resulting in long super-wide leaves of Wangmiao and 7-8 leaves of main stem.
The pre-winter prevention and control measures of wheat are based on the climatic characteristics of the region for many years, and the varieties with strong winter characteristics are selected to minimize the planting area of ​​weak winter varieties and strong spring varieties.
Appropriate late sowing, to minimize the pre-winter prosperous due to early sowing and warm autumn and winter climate. According to the winter nature of the variety, the sowing date can be determined sooner or later. The strong winter varieties can be sown several days in advance, and the semi-winter breeds can be sown several days later.
Scientifically determine the amount of seeding. According to the level of soil fertility, the type of tillering power, the sowing date of scientific determination of the amount of sowing sooner or later, do a good job of precision and semi-precision sowing, reduce seed waste, reduce the probability of formation of vigorous seedlings before winter.
Do a good job of scientific and rational fertilization, coordinate the proportion of N, P, and K fertilizers, but apply N fertilizers in some amounts, use conditional acceptable soil tests to apply formula fertilizers, reduce the blindness of fertilization and the waste of fertilizers.
Due to early sowing, a prosperous wheat field was found. After the wheat seedling was delivered, it could be pressed in time according to the situation, and the wheat seedlings were subjected to certain damage through pressing, which temporarily delayed the growth of wheat.
For the less prosperous wheat fields, deep plowing can be used to control the growth. The time was selected for deep cultivating on a sunny afternoon before and after the start of winter, and the depth was about 10. Through deep ploughing to cut off part of the root system, weakening the plant's absorptive capacity inhibits the growth of the aboveground part.
For wheat fields that have a serious trend of jointing, the repression can be carried out in the sunny afternoon after the end of childbirth and before the large freeze. This makes some wheat seedlings injured and prosperous.
In addition, attention should be paid to the prohibition of livestock infestation in wheat fields that are very prosperous, because the livestock indigo will uproot many wheat seedlings and cause many of the seedlings of the seedlings to be exposed. In winter, a large number of wheat seedlings will be frozen and die.
Author: Wuqiao County Farm Bureau Zhaofeng Juan Source: Northern agricultural Weekly
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