Winter rape has 10 or so large leaves and red-leafed seedlings, which can effectively resist cold damage. Moreover, due to a certain number of large leaves, the total number of main stem leaves increases, and the first branch increases, and high yields are obtained. Have a certain basis. Therefore, according to the characteristics and reproductive laws of rapeseed, we should grasp the following aspects in cultivation: First, master the fertilization principle of “mainly in the year and hanging outside the year†The emphasis of fertilization should be 60% to 70% of the total fertilizer during the year. After applying the root-fertilizer, apply Miaofei early, reapply wax fertilizer, supplement the application of the moss fertilizer, skillfully apply strong grain fertilizer, and increase phosphorus. Boron fertilizer. Phosphate fertilizer should be applied as early as possible. If boron fertilizer is not applied during seedling stage, boron can be sprayed once at seedling stage and initial flowering stage. Boron has been sprayed at seedling stage and boron can be sprayed once at the initial flowering stage. To prevent the prosperous winter, premature closure, consumption of nutrients, post-exposure, severe premature aging, the output is not high. Therefore, the wax fertilizer should be dominated by organic fertilizers (such as fertilizers, the quantity should be controlled to prevent excessive tenderness). If basal fertilizers are insufficient, they should be given more attention and the quantity should be increased. Second, rape winter spring strong hair to promote measures 1. Timely tillage promotes premature The cultivating ripper can promote soil weathering, increase soil permeability, promote root growth, increase temperature, accelerate decomposition of fertilizers, increase drought resistance, and promote root development in depth. Therefore, it is generally required that after transplanting, the weeding and weeding should be performed in order to facilitate the early development. 2. Timely soil, drought resistance, row of anti-freezing Combined with fertilizer, do a good job in soil warmth antifreeze. Rape is not tolerant to drought, as the saying goes, "Bad winter canola dry winter wheat." Insufficient moisture will affect root and leaf growth and flower bud differentiation. In case of dry weather and pale white soil, they should resist drought. However, in the case of low-lying or rainy terrain, clearing the gutters should be done to prevent stains on the roots, so as to prevent the roots from breathing, the leaves become red, yellow off, and even cause dead seedlings.
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