Winter and spring management of wheat
The goal of pre-winter management is to cultivate strong seedlings as the center, promote root growth, coordinate growth, and ensure that seedlings are safe for winter. Strong seedling standards: First, the main stem of the seedling age is 6 leaves, and the second is the tiller (4~5蘖). The total number of seedlings per acre is 60-700,000. The third is strong roots, and the secondary roots per plant are more than 10. Fourth, the leaves are green, but the color is not too yellow. Early seedling replanting. After emergence, for the severe lack of seedlings and ridges, timely germination and replanting, or transplanting large seedlings to ensure the basic number of seedlings. Classified management, weakening, stable, and prosperous. After the three-leaf stage, along with the growth of tiller sprouts, it is an important period for promoting root growth. Therefore, we must do a good job in management to ensure root growth. We must give priority to the management of weak seedlings, seize the favorable opportunity, and after entering the tillering period, first topdressing, then watering, timely cultivating loose soil, and weakening and strengthening. According to the actual situation, the strong seedlings should be supplemented with insufficient fertilizer foundation, and the quick-acting fertilizer can be used to prevent quick-fertilization; the early planting should be fertilized early and the water should be weakened; the bottom is fat, good, and suitable for sowing. Can not topdress. If the soil is dry after emergence, the water can be poured once. For Wang Miao, it is necessary to control according to the actual situation. The fertile enough, well-prepared, and sowing date can form a long field of 15% paclobutrazol wet powder 35-40 grams of water spray 50 kg, can also be used for deep tillage or Repression, but for groups that are too large due to excessive sowing, only seedlings or chemical control can be used.
In spring, the temperature rises and wheat enters a prolonged stage. In particular, high-quality special wheat starts early and returns to green. It should be managed early. The goal of spring management is to stabilize wheat and form strong stalks. The characteristics of stability are: the group is large but not over (about 800,000 mu), the leaves are long and not draped, the bottom section grows slowly, and the seedlings are clean and neat.
In the greening period, wheat is mainly weak, controlled and stable, and it can prevent and cure sheath blight. Generally, it does not fertilize water, inhibit sporadic breeding, accelerate polarization and achieve stable growth. After entering the greening period, it is generally necessary to use 20% triadimefon to prevent and cure the sheath blight, and combine the cultivating and weeding to protect the grass. For weak seedlings, it is necessary to fill the water early and raise the rate of seed formation. For Wang Miao, 15% paclobutrazol 35~40 g can be sprayed on 50 kg of water to prevent lodging. The strong seedlings should be controlled first and then promoted to make them grow steadily.
At the jointing stage, the stems and leaves are mainly promoted, the roots are developed, the number of panicles is stabilized, and the number of grains is increased. Generally, in the first section of the fixed length and the third section, the acres are chased after 5 kg of urea, and the spiders are controlled.
Into the booting stage, mainly to protect the roots and leaves, reduce the degradation of small flowers, improve the seed setting rate. The booting stage is mainly to ensure the supply of water. If the water is poured late, the soil moisture content is high, and the booting water can be postponed until the heading. Generally, the booting water should be poured in time in the middle and late March of April.
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