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Prevention of abnormal flowering technology in rape
In the process of growth and development of rapeseed, there are often abnormal phenomena such as early flowering, flowering, and secondary flowering, which affect the yield and quality of rapeseed. The necessary measures should be taken to control it. 1 The prevention and treatment of rapeseed flowering in early winter is the flowering of bolting in winter, so that the cold resistance of the plant is reduced and it is vulnerable to freezing injury. According to the specific circumstances to take appropriate measures to control. For better growth, years ago, or rapeseed will be bolting before Osamu, deep cultivating 7 ~ 10 cm, cut off part of the root system, in order to temporarily inhibit the growth, when the plant leaves a little yellow, then apply appropriate amount of available nitrogen fertilizer. For rape that is growing poorly and will be bolting, a method of heavy fertilizer may be adopted to prolong the period of vegetative growth and delay bolting. For rapeseed that had been bolted for years ago, it was selected to be removed in the sunny morning to suppress the growth of the top and promote the development of the lower branch. At this time, for rape that has appeared in early moss, anti-freezing and warming work must also be done. 2 The fact that flowering and rapeseeds fail to bloom due to rapeseed rape is mainly due to lack of boron nutrition during flowering. The effective measure to prevent rapeseed rape is to supplement boron and ensure sufficient supply of boron nutrients during flowering period. The borax solution with a concentration of 0.02% should be sprayed once at the seedling stage, bud stage and early flowering stage. When preparing the borax solution, the borax should be dissolved with a small amount of warm water first, then diluted with water and sprayed in a timely manner. The spraying should be uniform and the front and back sides of the blade should be sprayed wet. For rapeseed with severe boron deficiency and obvious deficiency in the field, it should be sprayed twice in the early flowering period. 3 secondary flower control rapeseed not only can not be strong secondary, but also consume large amounts of nutrients in the body, and aggravate the disease leading to premature aging, resulting in reduced production. To control the production of secondary flowers from vegetables, we must first apply reasonable fertilization, make full use of base fertilizer, early application of Miaofei, stable application of noxious fertilizer, no partial application of N fertilizer, increased application of P and K fertilizer, enhance plant lodging resistance, and control the application of N fertilizer later. Prevent flowers from being real. Secondly, we must strengthen field management. In the winter, we must do a good job of rooting the soil, prevent freezing damage, and at the same time promote root growth and development and prevent plant lodging; In short, to ensure the normal development of pods, reduce the loss of flower, so as to avoid excessive nutrients to breed secondary branches.