广东四季常青，冬种有4、5个月时间，最冷月平均气温北部8～10℃，中部12～14℃，西南部15～17℃，这样的冬季热量资源是北方所没有的（表1）。从表1可见，充分利用广东冬暖的气候资源，开发冬季农业，对提高农业的综合效益具有现实意义。为提高冬种作物的产量和经济效益，我们 Guangdong evergreen, winter species 4, 5 months time, the coldest month average temperature north of 8 ~ 10 ℃, the central 12 ~ 14 ℃, southwest 15 ~ 17 ℃, so the winter heat resources are not available in the north ( Table 1). It can be seen from Table 1 that making full use of winter and warm climate resources in Guangdong and developing winter agriculture have practical significance for improving the comprehensive benefits of agriculture. In order to improve winter crop yield and economic benefits, we