In recent years, the production of double-base rapeseed in Quzhou City has developed rapidly, especially in the winter of 2008. Due to the expansion of rapeseed planting area, the supply of rapeseed seeds is in short supply, and the late-stage market supply is all hybrid low-low rape varieties. To this end, we need to remind the majority of rapeseed farmers:
1. Rape is a kind of boron-loving crop, which requires more boron than other crops, especially for low-low rape. Boron is a necessary form of the meristematic form of the growth point of canola, as well as the differentiation and development of pollen, ovary ovule, fertilization process, and embryo development. Double-low rapeseed is sensitive to boron fertilizer. Once the soil is deficient in boron, it is more likely to occur “flowers and not realâ€, which has a great impact on yield. In severe cases, it can cause a reduction of more than 70%.
2, the main reasons for the lack of boron: First, the soil is deficient in boron; second, partial application of nitrogen fertilizer, potassium fertilizer will also cause potassium boron antagonism and boron deficiency; third, individual years of autumn and winter drought and spring drought, boron in the soil is fixed, The rapeseed is difficult to absorb, and the symptoms of boron deficiency occur. The fourth is the fake and inferior boron fertilizer. The boron content is extremely low, or even not. The boron deficiency is still present when the boron fertilizer is applied.
3, easy to lack boron varieties and boron fertilizer application methods. At the moment, the weather is warming up, and the rapeseed is in the stage of bud, which is the key period for applying boron fertilizer. It is necessary to apply boron fertilizer once. In particular, soil boron-deficient fields and double-low rape varieties, such as Zheshuang No. 6, Oil Research No. 10, Zheyou 18, Xiangza Oil Series, Zhongyou Miscellaneous Series, Zheshuang 72, etc. The use of 100-150 grams of borax per mu, the application concentration is 0.2%; or the United States imports 20.5% of the speed of boron boron 30 ~ 45 grams, the concentration of 0.1% spray. In particular, it is important to choose authentic high-quality boron fertilizer to ensure high-yield harvest of rapeseed this year.
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