我县无霜期为156天,全年苦霜前≥3℃的积温有3,474℃,如实行一年两茬,麦收后仅剩2,000℃左右,而“丹玉6号”玉米从播种到成熟需积温约2,700℃(≥10℃)。通过育苗移栽可使玉米在苗田地里弥补对热量的要求。尤其是玉米开花期仍能处在8月上旬高温时期(平均气温24～25℃),适合“丹玉6号”发育的需 Frost-free period of 156 days in my county, the year before the bitter cream ≥ 3 ℃ accumulated temperature of 3,474 ℃, such as the implementation of two crops a year, after wheat harvest only about 2,000 ℃, and “Dan Yu 6” corn from sowing to maturity need to accumulate temperature About 2,700 ° C (≥10 ° C). Transplanting seedlings can make corn in the field to make up for the heat requirements. In particular, the blooming period of maize can still be in the high temperature period in early August (the average temperature is 24-25 ℃), which is suitable for the development of “Dan Yu 6”