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“珍汕97A”是当前杂交水稻制种的主要不育系。它的全生育期较长,因此在春季繁种时,常因成熟过迟而影响连作晚稻的适时移栽,导致连晓产量下降:该品种在我地一般7月5日左右始穗开花,而七月上旬在我地因受梅雨影响,遇上连续阴雨和高温的机率很大(平均4年中有3年),因此严重影响异交结实率。1983年,我们在99.2亩“珍汕97A”春季繁种田,里进行了地膜覆盖育秧,以期达到春繁早熟、高产的目的。现将试验情况汇总如下。
“Zhenshan 97A” is the main CMS line of hybrid rice. Its long growth period, so in the spring breeding, often due to late maturity and even continuous cropping late rice transplanting, resulting in reduced production Lianxiao: The species in our general July 5 or so spike flowering, In the meantime, due to the rainy season in early July, there was a high probability of continuous rainy weather and high temperature (3 years on average in 4 years), which seriously affected the rate of outcrossing. In 1983, we cultivated 99.2 mu of “Zhenshan 97A” spring in spring and carried out plastic film covering to raise seedlings in order to achieve the purpose of early spring and early maturity and high yield. Now test the situation summarized below.