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雷州半岛光温条件较好,对冬春杂优稻繁制种较有利。但早春天气较冷,按常年12月、1月、2月、3月的平均温度分别为18.0℃、16.4℃、17.3℃、21℃,12月中旬后,还会遇上最低温变≤7℃4—5天,≤12℃11—14天。解决防寒育秧的问题是雷州半岛冬春繁制种的关键。因父本生育期较长,所以关键是父本的防寒育秧问题。本试验企图通过多种防寒法的比较,从中摸索出在雷州半岛行之有效的防寒育秧技术。
Leizhou Peninsula, light and temperature conditions are good, winter and spring hybrid rice breeding more favorable. However, the weather in early spring is colder, and the average temperature in December, January, February and March of all year is respectively 18.0 ℃, 16.4 ℃, 17.3 ℃, 21 ℃ and mid-December, ℃ 4-5 days, ≤12 ℃ 11-14 days. Solve the problem of cold seedling is the key to the breeding of winter and spring in Leizhou Peninsula. Due to the longer parental growth period, so the key is the father of the cold seedling problem. This test attempts to compare a variety of cold methods, from which to find out in the Leizhou Peninsula effective cold seedling technology.