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在我国北方旱作地区进行了连续 7a的玉米保护性耕作与传统耕作的田间对比试验 ,结果表明 :保护性耕作的平均土壤体积质量虽较传统耕作高 5 ,但不会导致土壤严重压实 ;土壤含水率较传统耕作平均增加 12 ,深松地达 2 0 .7 ,提高了土壤保蓄水能力 ;玉米产量平均增加 13 ,且成本降低。研制了不同的播种机防堵机构以及组合式限深切草器与双齿盘拨草配合防堵的 2 BMQF- 4 C型玉米免耕覆盖播种机和可调翼铲式深松机
Field trials comparing the conservation tillage with conventional tillage for maize in the northern part of China in the dry farming areas of northern China for seven years showed that the average soil bulk density of conservation tillage was 5% higher than that of conventional tillage, but did not result in severe compaction of the soil The average soil water content increased by 12% compared with the traditional tillage and the subsoiling reached 20.7%, which increased soil conservation water storage capacity. The average maize yield increased by 13% and the cost was reduced. A series of BMTF-4 C corn no-tillage seeders and adjustable wing-shovel subsoiler have been developed with different seeder anti-blocking mechanisms and a combination of depth-limited grass cutters and double-toothed disk grasses.