摘要
根据作物播种对行上压密和播深稳定性的要求，改制了２ＢＤＹ－１２型单体仿形压轮式播种机。与２ＢＦ－２４型播种机及２ＢＹ－２４型压轮式播种机的田间对比试验表明，用单体仿形压轮式播种机播后土壤松紧程度适宜，土壤密度为１．１６９ｇ／ｃｍ３，播种深度稳定，播种深度变异系数为１７．２０％，均符合农艺要求。并且出苗提前１～２天，幼苗生长均匀、整齐，单株鲜重、根重、直径、叶面积等生物学指标均优于常规播种。
The uniformity, completeness, and vigor of wheat seedling are most important factors in high yield. These demand a drill with apropriate compaction and consistent drilling depth. In this paper, a 2BDY 12 drill with individual profiling press wheel is developed. Results of field tests in comparison with the 2BF 24 drill and 2BY 24 show that the soil bulk density by 2BDY 12 is 1 169 g/cm 3, and its C.V. is the most small. The soil bulk density by 2BF 24 and 2BY 24 are 1 05 g/cm 3 and 1 06 g/cm 3. The press wheel of 2BDY 12 drill unit follows the field surface, a constant depth of drilling is achieved. C.V. of drilling depth by 2BDY 12 is 17 20% while C.V. by 2BF 24 is 34 29% and C.V. by 2BY 24 is 29 05%. The 2BDY 12 provides an optimum environment for plants based on its apropriate compaction and even drilling depth. Due to this, the emergence of wheat seedling can be moved up 1￣2 days. The germination rate, uniformity and vigor of wheat seedling are improved. The biological indexes, such as seedling fresh weight, root weight, leaf area and wheat shoot diameter, are better than the ones with 2BF 24.
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
1998年第S1期35-38,共4页
Transactions of the Chinese Society for Agricultural Machinery
关键词
仿形
播种机
性能
试验
Profiling, Seeders, Performance, Tests
