一、精耕细种，操作要规范１．整地平整土地，茬口清爽，墒情不好的情况下，可以先浇水润地，以便于人工开沟播种，整地不细，灌溉不匀，施肥不匀会影响植株的形态表现，不便于田间观察鉴定。２．密度原种田亩播种量以２～４千克为宜，稀播繁殖的种子田可以播１．５～２千... First, intensive species, the operation should be standardized 1. Soil preparation and leveling of land, fresh crop rotation, moisture conditions are not good, you can first water moisten, in order to artificial sowing seeding, land preparation is not fine, uneven irrigation, uneven fertilization will affect the plant morphology, inconvenience in the field observation Identification. 2. Density of the original acres of acres of sowing to 2 to 4 kg is appropriate, seed propagation can be sown thin broadcast 1.5 to 2 thousand ...