利用杂种优势以提高水稻单位面积产量,目前有两个途径,一是选育三系配制杂种,二是应用化学药剂对特定的强优组合中的母本品种进行杀雄处理,导致花粉丧失育性而不影响雌蕊的正常受精能力,再与父本品种配制杂种供生产应用。广东省化杀杂交籼稻面积已达lOO多万亩,获得了一定增产效果。我们于1978年开始进行粳稻化学杀雄试验研究工作,现将结果整理如下: At present, there are two ways to utilize heterosis to increase the yield per unit area of ​​rice. One is to breed hybrids of three lines, and the other is to use chemical agents to kill male parent varieties in specific strong combination, resulting in loss of pollen Sex without affecting the pistil normal fertilization ability, and then with the paternal varieties hybrids for the production and application. Guangdong Province to kill hybrid indica rice area has reached more than lOO million mu, access to a certain yield increase. We started to carry out the chemical killing test in japonica rice in 1978, and the results are summarized as follows: