Overwintering canola leaf growth

According to experiments, the number of green leaves in the wintering period of rapeseed can increase by 15 kilograms per mu. Therefore, the wintering period of rapeseed should focus on increasing the number of leaves for field management.

In recent years, the cultivated area of ​​no-tillage and transplanting rapeseed has been continuously expanded in the cultivating ripper. The rapeseed field cultivated in this way has poor soil permeability and is not conducive to the growth of the root system. In the wintering period, timely cultivating loose soil and cultivating soil roots can increase the ground temperature by 1°C～2°C, so as to promote root development and leaf growth.

Re-application of wax fertilizer Osamu before and after the re-application of wax fertilizer, soil miscellaneous fertilizer, human and animal manure and other organic fertilizers, with appropriate application of potash fertilizer, urea, ammonium bicarbonate and other fertilizers. The fertilizer is applied between rows of rapeseed, so that the ground temperature can be increased by 2 °C ~ 3 °C. The application of wax fertilizer varies with variety, growth and fertility. For early-maturing rapeseed varieties, early application and full-fertilizer application of wax fertilizer are required, and less prosperous rape plants are applied and late fertilization is applied. Fields with sufficient fertility have little or no fertilization.

There are more rain and snow in the drought-resistent rapeseed during the winter, so clear up the ditch system as soon as possible so that there is no water accumulation and no waterlogging in the field, so as to reduce the frost damage and prevent root rot. In winter, low-temperature and low-rain rape leaves will turn red, and the whole plant will grow slowly or even stagnate. It should be combined with fertilization furrow irrigation or flooding with large water.

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