论文部分内容阅读
甜菜是重要的经济作物,许多国家都重视发展甜菜生产,以获取较高的利润。国外生产甜菜的国家在70年代已实现全生产过程机械化,亩产高达3—4吨。甜菜也是黑龙江省主要发展的经济作物之一,但现在产量较低,亩产仅一吨左右。其原因之一就是机械化水平低,尤以播种环节较突出。常因播种质量差导致缺苗断条,保苗率低,用工量大等。严重影响单产的提高。 目前甜菜生产均用24/48行条播机进行播种。甜菜对播种的质量要求比较严格。由于甜菜种子很小,出土能力很弱,种子发芽需水量大。所以甜菜播种除要求有较高发芽率的种子和精细的土地条件外,还要求较严格的播种深度和均匀的种子分布。
Beet is an important cash crop, many countries attach importance to the development of sugar beet production, in order to obtain higher profits. Countries that produce sugar beet abroad have mechanized the entire production process in the 1970s, with a per-mu yield of up to 3-4 tons. Beet is also one of the major cash crops for development in Heilongjiang Province, but its output is now low, with only about one ton of mu per mu. One of the reasons is the low level of mechanization, especially the sowing more prominent. Often due to poor quality sowing seedlings caused by broken bar, seedling rate is low, a large amount of labor. Seriously affect the yield increase. At present, beet production is sown with 24/48 line seed drill. Beets on the quality of sowing more stringent requirements. Because of the small beet seeds, unearthed the ability is very weak, seed germination water demand. Beet seeding, in addition to requiring higher germination rates of seeds and fine soil conditions, also requires more stringent depth of sowing and uniform seed distribution.