Winter rape has ten or so large leaves and red-leafed seedlings, which can effectively prevent freezing damage. Due to a certain number of large leaves, the total number of main leaves increases, and the number of first branches increases, resulting in high yields. Have a certain basis. Therefore, according to the characteristics and reproductive laws of rapeseed, we must grasp the following aspects in cultivation.
First, master the fertilization principle of “mainly in the year and hanging outside the yearâ€
The focus of fertilization should be 60-70% of the total amount of fertilizer during the year. Based on the application of the root-fertilizer, early application of Miaofei, re-application of wax fertilizer, supplement of the application of moss fertilizer, skillful application of strong grain fertilizer, increase of phosphorus and boron fat. Phosphate fertilizer should be applied as early as possible. If boron fertilizer is not applied during the seedling stage, boron can be sprayed once at the seedling stage and the initial flowering stage. Boron has been sprayed during the seedling stage, and boron can be sprayed once during the initial flowering period. 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 fertilizer, 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, promptly cultivated to promote early
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.
Third, timely earth, drought, drainage antifreeze
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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