【摘要】 保护性耕作指的是"有利于保土保水维持并改善土地生产力的耕种措施","覆盖度"并不是唯一标准;各种耕种措施既有"保护"一面,也有"非保护"一面,并无"先进"或"落后"之分,不宜将美国提倡的免耕覆盖绝对化;免耕覆盖在不同地区效果不一,在半干旱地区效果显著,在湿润地区则应用较少;当前要加强研究适合中国国情的各地区保护性耕作的道路、模式和技术体系,农艺与农机密切配合,避免缺乏研究试验与示范的大规模盲目推广。更多还原

【Abstract】 The conservation tillage is defined as a farming system which will reduce soil erosion and sustain land productivity.Every measure of soil tillage has both conservative and non-conservative function.The effect of no-tillage with straw cover in different regions appears not the same and the beneficial results are mainly yielded in sub-arid areas.The model and technology of conservation tillage suited for different regions should be put forward in order to build a Chinese characteristic conservation tillage system including both agricultural technology and machine.更多还原