平果县种子服务公司1990年早造百亩汕优99连片制种单产突破300公斤.主要是在确保穗数基础上主攻异交结实率。技术措施是:插一期父本,充分发挥父本花粉集中的优势;父母本“中、大秧龄”和“双本”,多本插植;本田肥料一次施足.使禾苗稳健发育;“九二○”、“九二○”增效剂、花时调节剂混合施用;改进人工辅助授粉法。 Pingguo County seed service company early in 1990 to make a hundred acres of Shanyou contiguous seed production exceeded 300 kilograms, mainly in ensuring the number of spikes on the main outcrossing rate. The technical measures are as follows: Inserting a male parent to give full play to the advantages of male pollen concentration; parents “in the big seedling age” and “double”, multiple planting; Honda fertilizers once enough to make the seedlings steady development; Nine two ○ “,” nine two ○ "synergist, when mixed with flower regulators; improve artificial assisted pollination.