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一、保护性耕作的概念保护性耕作是指用大量秸秆残茬覆盖地表,减少耕作,能保证种子发芽即可,主要用农药来控制杂草和病虫害的一种耕作技术。保护性耕作的核心技术主要体现在以下三点:①必须取消铧式犁耕翻,这是保护性耕作的首要特征;②免耕或少耕播种,尽可能少动土(即使是播种时也要尽量减少对土壤的扰动);③播种时必须要有大量秸秆残茬覆盖地表,秸秆全部还田或高留茬(畜牧业发达地区可高留茬),秸秆还田量要在30%以上,播种后秸秆覆盖率不低于30%。
First, the concept of conservation tillage Conservation tillage refers to a large number of straw stubble cover the surface, reduce tillage, to ensure that the seeds germinate, the main pesticide to control weeds and pests and diseases of a farming technique. The core technologies of conservation tillage are mainly embodied in the following three points: (1) Plow-tillage must be eliminated, which is the primary feature of conservation tillage; (2) no tillage or less tillage and less soil removal (even when sowing Try to reduce the disturbance to the soil); ③Seeding must have a large number of straw stubble covering the surface, all stubble or stubble stubble (husbandry in developed areas can be stubble), straw to more than 30% After sowing straw coverage of not less than 30%.