Spring Field Management Techniques of Wheat in the Middle and Lower Reaches of the Yangtze River

Partial seedling

Mainly for drought and wheat and early sowing rice and wheat. The main reason for the formation is that the sowing date is relatively early, the temperature in autumn and early winter is too high, resulting in a large seedling age, and the seedling volume is too large, and the soil moisture is better after sowing, and the emergence rate is high, resulting in a large population. Form Wang Miao. The specific performance is that the seedlings are large and the group is full. Many plots have been closed.

Repression control seedlings. After the spring temperature rises and the wheat seedlings resume growth, they are suppressed by stone mortar or a roller. General Wang Miao suppressed 1 time, and Wang Miao could be suppressed once after 5-7 days of the first suppression.

Strictly control the return to the green fertilizer, heavy application of jointing and booting fertilizer. The re-greening fertilizer in the traditional cultivation technique not only has low fertilizer efficiency, but also tends to cause prolongation, leading to lodging in the later stage. Fertilization should be strictly controlled before jointing to control group growth. At the jointing stage (pour 3 leaves are extracted), when the group of wheat seedlings shows obvious yellowing, 46.76.7 square meters of wheat is applied with 45% of multi-component compound fertilizer (N, P2O5, K2O are 15%) 15-20 kg, urea 8 -10 kg (or 3-5 kg ​​during the jointing period, 5 kg when the 1 leaf is extracted) to promote the large grain weight of the ear. If there is insufficient soil moisture during topdressing, the water should be added immediately after topdressing.

Control and prevent lodging. If the group is too large, the effect of repression is not good, and there is a risk of lodging, it should be sprayed with paclobutrazol and other growth inhibitors before the body is lifted (pour 4 leaves are extracted). The concentration of related products varies greatly and should be applied according to the manufacturer's recommended method.

Late seedling

Mainly for late sowing rice buckwheat, especially in the japonica rice area of ​​Jiangsu Province, due to the promotion of late-maturing japonica rice varieties and the spread of direct seeding rice, the rice harvest was too late, resulting in late planting of wheat. Many plots have "one needle" or even "soil". Due to the large amount of late-sown wheat, most of the late-sown wheat seedlings are relatively large, and single-stalk wheat cultivation techniques should be adopted.

I want to use spring fertilizer and heavy fertilizer. When the number of seedlings in the field can reach 90%-100% of the most suitable panicles in the local area (in Jiangsu, for example, the number of seedlings per 666.7 square meters is 28-300,000 in southern Jiangsu, 33-380,000 in Suzhong, and 40 in northern Jiangsu). -45 million), no spring fertilizer is applied, and in the jointing stage, when the small branch of the field begins to die obviously, every 666.7 square meters of wheat is applied with 15-20 kg of multi-complex fertilizer and 6-8 kg of urea. If the number of field seedlings is too small when returning to green, it should be traced back to Qingfei to promote tillering, 8-10 kg of urea per 666.7 square meters of wheat, and 5-10 kg of urea after jointing.

Control and prevent lodging. If there are too many seedlings in the field and there is a risk of lodging, it should be sprayed with paclobutrazol and other growth-preventing preparations before the body-building period.

Other technology

Clear the ditch and defend against waterlogging. This spring, the rain is relatively adequate. Special attention should be paid to the prevention of waterlogging, and the internal and external three trenches should be cleaned up as soon as possible to ensure smooth drainage and ensure rapid drainage and reduce soil moisture after rain.

Timely control of pests and diseases. Chemical weeding and weed control should be carried out in time according to the type of weeds. It is necessary to strengthen the measurement and prevention of pests and diseases such as powdery mildew, scab, sheath blight and rust.

Strengthen the defense and remediation of cold and cold damage. Due to the rapid temperature recovery in spring, it is expected that the growth of early spring wheat seedlings is relatively early, and the probability of occurrence of freezing cold damage in this year is relatively large, and special attention should be paid to defense and remediation.