1965年和1973年,宁波九中的革命师生在宁波农牧场和该校农场,对水稻的闭药开花现象进行了观察研究,取得了初步的结果。试验表明,在抽穗前两周左右把供试品种移栽到盆钵中,置于户外阳光之下,在开花期的早晨6～7时把盆栽水稻从户外移入室内,在这种情况下,8时30分前开的花都为闭药开花,即早期开花花药露出颖外,并不开裂,内部的花药呈群集粘着;8时30分后开放的花,花药极易破裂并撒出花粉。在8时30分前开的花用普通镊子 In 1965 and 1973, revolutionary teachers and students from Ningbo Nine made observation and research on the flowering and closing of rice in the farms and farms in Ningbo and achieved preliminary results. The test showed that about two weeks before heading, the test varieties were transplanted into pots and pots, placed outdoors under the sunshine, and potted rice plants were moved outdoors from 6 to 7 am of flowering period. In this case, 8:30 before the opening of the flowers are closed for flowering, that is, early flowering anthers reveal Ying, does not crack, the internal anther clustered; open after 8:30, anthers easily rupture and sprinkle pollen . Flowers before 8:30 with ordinary tweezers