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[目的]该试验可为延长能源高粱转化乙醇加工期提供参考依据。[方法]试验设计采用单因素、4水平区组设计。[结果]在光热不足条件下,覆膜模式可以提高光热利用率,完成生育周期。2种栽培模式下第1播期的茎粗与其他3个播期的差异均达到显著水平。随着地温以及气温的升高,2种栽培模式对能源高粱生长发育的影响逐渐减弱。[结论]辽宁省干旱半干旱地区播种时间不宜早于4月15日,否则会因地温低影响出苗率。最晚可延迟至5月20日左右,在保证其完成生育周期的同时,茎秆中含糖量可以达到较高水平。
[Objective] The experiment could provide a reference for prolonging the conversion period of energy sorghum into ethanol. [Methods] The experimental design adopted single factor, 4-level block design. [Result] Under the condition of insufficient light and heat, the film-coated mode could increase the utilization of light and heat and complete the growth cycle. The differences of the sowing dates of the first sowing date and the other three sowing dates in the two cultivation modes all reached the significant level. With the increase of ground temperature and temperature, the effects of two cultivation modes on the energy and sorghum growth and development gradually weakened. [Conclusion] The sowing time in arid and semi-arid areas of Liaoning Province should not be earlier than April 15, otherwise it will affect the emergence rate due to low ground temperature. The latest can be delayed until May 20 or so, to ensure its completion of the fertility cycle at the same time, the sugar content in the stem can reach a higher level.