Spring field management techniques of weak gluten wheat in the lower reaches of the Yangtze River

In spring, the growth of wheat is in the jointing stage, the vegetative growth rate is accelerated, and the tillers are polarized. During this period, the physiological metabolism of wheat plant is exuberant, which is at the peak of fertilizer and water demand, which is the key period of efficient fertilizer and water management. The main management objectives at this stage are to control ineffective tillers and excessive elongation of basal internodes, and to promote shaken tillers into spikes and strong stalks. The main measures are: timely re-application of jointing fertilizer, strengthening the prevention and control of diseases and insect pests, and implementing contingency measures. First, timely re-application of jointing fertilizer 1. In wheat fields with normal growth, the amount of nitrogen applied at the jointing stage accounts for about 30% of the total amount of nitrogen applied to wheat in the whole life, combined with the application of potassium and phosphate fertilizer. 15 kg of high concentration compound fertilizer (15% of nitrogen, phosphorus and potassium) and 5 kg of urea were applied per mu. 2. The fields with weak growth and small population can be applied in advance to the early stage of jointing. 3. The application of wax fertilizer and green relay fertilizer should be postponed to the middle and later stage of jointing, and the amount of fertilizer application should be reduced appropriately. Second, timely control of diseases and insect pests 1, sheath blight: 30 grams of 20% Jinggangmycin wettable powder or 12.5% Rhizopus clear water agent 150 ml per mu plus about 50 kg of water, evenly sprayed or poured at the base of wheat plants, and secondary control in seriously diseased fields at intervals of 7 to 10 days. 2. Powdery mildew and rust: use 50 ml of 20% fenrust EC per mu and spray 40 kg of water. 3. Scab: 50 grams of 80% carbendazim ultrafine powder per mu and spray control of 40 kg of water. 4. Wheat aphid: spray 40 kg of water with 40% dimethoate EC per mu. 5. At the same time, attention should be paid to the investigation of the occurrence of diseases and insect pests, and timely prevention and control should be done. 6. the suitable time for medication is before 10:00 in the morning and after 3 o'clock in the afternoon. 7. In order to use all kinds of pesticides for the prevention and control of diseases and insect pests, we should strictly grasp the dosage, the best application period and the number of times according to the instructions on the drug packaging, so as to ensure the control effect, prevent drug damage, and pay attention to the safety of human beings and animals at the same time. Third, implement disaster response measures. 1. Dredge and clean the ditch system in time to ensure drainage and irrigation to resist drought. 2. If the cold and warm suddenly change and the "late spring cold" occurs, after the young ears of wheat are injured by low temperature, remedial measures should be taken actively, applying 3kg urea per mu to strive for high tillers to form ears and reduce the loss of yield. 3. It is necessary to do a good job in the preparation for the prevention and control of diseases and insect pests and high temperature forced ripening and premature senility in the later stage, so as to reduce the harm, increase grain and weight, and achieve high yield and harvest.