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1保护性耕作现况(1)试验推广情况。近年来,甘肃省天水市秦州区投入保护性耕作机具65台,其中免耕播种机5台、深松机5台,实施保护性耕作试验推广面积670hm2。试验表明,示范田小麦产量5400～5700kg/hm2,比大田增产450～600kg/hm2,增产幅度8%～10%。保护性耕作是
1 Conservation tillage status (1) test promotion situation. In recent years, 65 conservation tillage machines have been put into operation in Qinzhou District, Tianshui City, Gansu Province, including 5 no-till planters and 5 subsoiling machines. The area under conservation tillage was 670 hm2. The experiment shows that the output of demonstration wheat is 5400 ~ 5700kg / hm2, which is 450 ~ 600kg / hm2 higher than that of the field and the yield increase is 8% ~ 10%. Conservation tillage is