1.建立合理轮作制度。胡麻不宜连作或匝作。连作不仅会引发立枯病,而且过多地消耗土壤的同一养分,降低土壤肥力。胡麻尤其对氮肥需求非常敏感,每50公斤胡麻需纯氮3.1公斤,纯磷0.625公斤。因此必须选择需氮肥少或能固氮的前茬作物,豆茬、麦茬等都是胡麻的良好茬口。要求山区轮作五年以上,水川区轮作三年以上。 1. Establish a reasonable rotation system. Flax should not even make or turn. Continuous cropping will not only trigger blight, but also consume too much of the same nutrients in the soil and reduce soil fertility. In particular, flaxseed is very sensitive to the demand for nitrogen fertilizer, with 3.1 kg of pure nitrogen and 0.625 kg of pure phosphorus per 50 kg of flax. Therefore, we must choose less nitrogen fertilizer or can be nitrogen stubble before the crop, bean stubble, wheat stubble and other flax are good stubble. Mountain rotation for more than five years, Mizoguchi rotation for more than three years.