杂交水稻繁殖、制种中,于始穗期喷施“九二0”是一项提高结实率的有效措施。其作用是使节间伸长,降低包颈度;一般亩用量在10克左右,高至10克以上。但目前“九二0”生产厂家有限,货源不足,价格太高。同时对“九二0”施用量过多还有会导致杂种一代出现恶苗病的疑虑。为解决上述问题,我们进行了“九二0”添加剂的研究,目的在于达到部分或完全替代“九二0”的效果。添加剂分三种不同配方,暂定名为添加剂Ⅰ号、添加剂2号和添加剂3号。本研究包括二个试验。 Hybrid rice breeding, seed production, spraying at the beginning of the “September 20” is an effective measure to improve the seed setting rate. Its role is to make the internodal elongation, reducing the package neck; general amount of acres in 10 grams, up to 10 grams or more. However, at present, “9220” manufacturers are limited, insufficient supply and the price is too high. At the same time, excessive use of “920” can cause misgivings among hybrids. In order to solve the above problems, we conducted a study on “9220” additives to achieve the partial or complete replacement of the “920” effect. Additives divided into three different formulations, tentatively named Additive Ⅰ, Additive 2 and Additive 3. This study includes two experiments.