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农谚道:“换茬如换油”,“茬口倒得顺,粮食打满囤”。通过换茬,可以使根系深浅不同,吸收养分种类不同的作物互相搭配,达到全面利用土壤养分,提高作物产量,用地与养地相结全的目的。其具体的换茬原则是: 一、冷茬与热茬轮作。种植甜菜、水稻和瓜类作物的地块,由于植株荫蔽,使土壤发荫,叫做冷茬。种植麦类、谷类、土豆、烟草、大麻等作物的地块,土壤湿暖发暄,叫做热茬,冷茬与热茬轮作,有利于提高作物产量。
Agricultural proverb said: “change stubble, such as oil change,” “stubble down Shun, food hoarding.” Through the replacement of stubble, you can make the roots of different shades, absorb nutrients with different types of crops with each other, to achieve full use of soil nutrients, increase crop yields, land and raise the ground phase of the whole purpose. The specific stubble principle is: First, cold stubble and hot stubble rotation. The plots of sugarbeet, rice and melon crops are planted and the soil is shaded due to the shade of the plants, called cold stubble. The cultivation of wheat, cereals, potatoes, tobacco, cannabis and other crops in the plots, soil wet warm greeting, called hot stubble, cold stubble and hot stubble rotation, help to increase crop yield.