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发展保护性耕作的重要意义有哪些?

来源:科普中国-实用技术助你成才 2017-12-18     

  (1)发展保护性耕作是治理农田扬尘、防治农田风蚀水蚀的重要措施。保护性耕作实施秸秆留茬覆盖,起到挡风固土的作用,大面积实施可有效地减少农田扬尘,防治沙尘暴。秸秆覆盖和深松技术可减少土壤水分蒸发,增加土壤蓄水能力,减少大雨和暴雨造成的水土流失。 (2)发展保护性耕作是培肥地力、促进农业可持续发展的主要手段。保护性耕作秸秆还田增加土壤有机质,蓄水保墒,提高土壤肥力,改善团粒结构,减少土壤板结和退化,促进耕地的可持续利用。 (3)发展保护性耕作是降低农业生产成本、提高生产效益的有效途径。保护性耕作采用机械化免耕、少耕和复式作业,简化工序,降低成本。长期实施可有效减少农田用水量,增加产量,提高农业生产效益,促进农业节本增效。 (4)发展保护性耕作是防治秸秆焚烧、减少温室气体排放的重大举措。保护性耕作为秸秆利用找到了出路,有效防止了农民抢农时赶季节焚烧秸秆。大面积实施秸秆还田,使碳元素以固态的形式存在于土壤中,从而减少空气中二氧化碳气体的总量,减少温室气体排放。 (5)发展保护性耕作是坚持科学发展观、构建农村和谐社会的重要体现。发展保护性耕作,有利于转变农民的传统耕作观念,实现科学种田。保护性耕作技术的综合应用,实现了农业生态、经济和社会效益有机统一,在发展生产的同时,改善了生态环境,实现了人与自然和谐相处、和谐发展,是构建社会主义和谐社会的重要体现。 编辑:辛霞

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