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Rape field management should pay attention to
The process of cultivating loose soil in the field can help cut off part of the root system, which in turn limits the growth of rapeseed and delays its development. This practice also helps to break up soil capillaries, reducing water evaporation and improving soil aeration, which supports better overall plant growth.
Applying topdressing at the right time with available nitrogen fertilizer can encourage stronger vegetative growth while suppressing reproductive growth. However, it's important to adjust fertilization based on the condition of the seedlings. For example, if the plants are growing vigorously due to early sowing or show signs of excessive growth, it may not be necessary to apply more fertilizer. On the other hand, for weak or yellowing plants, timely application of nitrogen-rich fertilizer can help prevent premature flowering and reduce stress, promoting healthier growth after spring.
To manage overgrown or impending bolting plants, it is essential to implement control measures. Spraying growth regulators like paclobutrazol can help regulate plant growth by focusing energy on root development, delaying flowering, and increasing resistance to cold and environmental stress.
Timely removal of harvested rapeseed is crucial to minimize nutrient waste and encourage the formation of primary and secondary branches, which can help compensate for yield losses. Harvesting should be done on sunny days to avoid damage from moisture. Avoid harvesting during cold periods, as this can increase the risk of rot and infection at the cutting sites. After harvesting, applying 2-3 kg of urea per acre can support continued healthy plant growth.