目前各地测定杂交水稻空秕率的方法不一,标准不同,常易影响试验的准确性和一致性。因此测试方法有改进的必要。水稻的总粒数包括实粒、秕粒和空粒。实粒是有经济价值的籽粒,空粒则是没有完成双受精或虽已受精但子房不膨大或子房膨大而未灌浆的颖花,秕粒是已灌浆但籽粒很不饱满的谷粒,国内多采取半饱以下为界限。据测定半饱以上的谷粒经加工仍有经济价值,而半饱以下的谷粒在加工为精米时大多成为碎米。空秕率是指不足半饱粒数加上空粒数的和占总粒数的百分率。通常测定空秕率的方法有如下几种;(一)逐粒称重法:在样品中逐粒称重,计算半 At present, there are different methods to determine the empty rice rate of hybrid rice. Different standards often affect the accuracy and consistency of the test. Therefore, there is an improvement in test methods. The total grain number of rice includes grains, grains and grains. Real grain is a grain of economic value, the empty grain is not completed double fertilization or although fertilized but the ovary is not swollen or ovary enlargement without filling of the spike, noodles are grouted but the grain is not full grain , More than half of the country to take the following as the limit. It is determined that more than half of the grain processed by the economic value is still there, and half the following grains in the processing of polished rice mostly become broken rice. Empty rate refers to less than half the number of particles plus the number of empty particles and the percentage of the total number of particles. There are several ways to determine the rate of air 秕 usually: (a) grain by weight method: weighing grain in the sample, calculate half