我单位在云南西双版纳地区连续 3年进行玉米南繁试验 ,事实证明 ,1 0月 1 0日前播种是最适宜播期 ,于 1 2月授粉 ,2月上中旬收获 ,生长期间未遇低温危害 ;1 1月 1 5日前播种 ,采用地膜覆盖栽培 ,于 1 2月至 1月授粉 ,在花期遇 7～ 8℃低温的情况下 ,开花授粉及结实仍然良好 ,一般完成授粉任务的 95 %以上。 3月中下旬收获 ,4月初种子可运回 ,及时为春播提供种源。在西双版纳有大量的冬闲土地 ,并且气候温和 ,从不受台风影响 ,南繁前景看好 My unit in Yunnan Xishuangbanna conducted three consecutive years of trial propagation of corn, the facts show that 10 o’clock before sowing is the most suitable sowing date in February pollination, harvested in the middle of February, did not encounter low-temperature damage during growth; 1 January 15 before sowing, the use of plastic film mulching, pollination from January to January in the case of flowering encountered 7 ~ 8 ℃ under the conditions of the flowering and pollination is still good, more than 95% of the completion of the pollination task. Harvest in mid to late March, the seeds can be shipped back in early April, in time for the sowing to provide provenance. In Xishuangbanna has a lot of winter land, and the mild climate, never affected by the typhoon, Fanfan prosperous prospects