4 a new blade has been developed and its parameters have been studied in detail . 5 a new no - tillage planter 2bmyw - 2 is made and more than 110mu fields in herbei province are planted using it . the production experiments shown that the rate of clearing rootstalks away from seed beds is more than 92 % and disturbed soil is from 20 % to 27 % and the working performance of the sample machine is excellent ( 5 )制作出2bmyw - 2型切挖式玉米免耕播种机一台，在河北丰宁和学校农场进行了110多亩的免耕播种试验，结果表明：该机对播种带的玉米根茬清除率达92以上，种床基本无玉米根茬，破茬能力强、清茬效果较好，动土量少，表土破土量约占20 27 。
2.
The test results in the no - tillage fields with corn rootstalks shown that the sample machine has a good ability to cut and dig corn rootstalks only in the seed beds so that the new no tillage planter can create a good condition of seed bed and have lower power consume . 2 system experiment is conducted to investigate the mechanical properties of rootstalks and soil rootstalk composite . the experiment results include : ? he maximum cutting force decreased exponentially with increasing cutting speed and the moisture contents of rootstalks 通过对新型免耕播种机的田间生产试验，证明了切挖处理播种带玉米根茬原理可行，所开发的机具结构新颖，具有创新性；该机不但能创造无根茬的良好种床条件，有利于种子生长发芽，而且不需大量粉碎根茬，因而扰土量少、整机消耗动力小、破茬入土能力强，有利于充分发挥保护性耕作的优势。
