Lodging is one of the main factors affecting the yield and quality of wheat. The lodging of wheat before and after heading reduces production by 30% to 40% and lodging at the filling stage reduces production by 10% to 30%. Spring is a crucial period for preventing the lodging of wheat. Thoracoscopic Forceps,Minimally Invasive Instruments,Thoracic Leaves Forceps,Vats Sponge Forceps ZHEJIANG SHENDASIAO MEDICAL INSTRUMENT CO.,LTD. , https://www.shendasiaomed.com
First, take a deep root and suppress invalid childbirth. The wheat field with a total stem number of more than 800,000 acres in the past year, and the wheat field with a maximum of 1 million acres per mu in the spring, can easily cause field canopy closure, poor ventilation and light transmission, and reduced stem support, which can easily cause lodging. In general, deep-middle ploughing is carried out before returning to greening or returning to early Qing, cutting part of the root system, reducing the absorption of nutrients and water, restraining ineffective delivery, controlling the internode elongation of the effective tiller, and increasing the lodging resistance of wheat.
Second, a reasonable fertilizer to water, control the length of the end of three sections. For wheat fields with prosperous tendencies, if there is sufficient fertilizer or excessive water in the spring, especially if the amount of nitrogen fertilizer is too large, it will cause the wheat to grow long, internodes lengthen, the straw will be fine, and the danger of lodging will be buried. For this part of the wheat field, it is necessary to postpone the time of top-dressing watering to the jointing stage, control the supply of fertilizer and water, and make polarization of the birth as soon as possible, so that the length of the bottom three sections is controlled within 30 cm. At the same time pay attention to control the amount of nitrogen fertilizer, increase phosphorus and potassium fertilizers.
Third, chemical prevention and control. For wheat fields that are likely to be lodging, from the time of getting up to the jointing stage, use 15% paclobutrazol 40-50 grams, or 5% uniconazole 30-40 grams, or 25% auxiliaries 15-20 milliliters. - 40 kg evenly sprayed on the wheat seedlings. Note that the control of wheat must be carried out before the jointing. After the jointing, the preventive effect should not be obtained.