论文部分内容阅读
四、种子活力测定方法 ISely认为活力可在实验室内直接或间接地测定.直接测定是根据种子和环境的相互关系,进行测定模拟田间条件的冷试验等。间接测定是测种子的某些生理特性,例如酶活性等。Grabe主张根据美国种子检验实验室的日常工作,将活力测定分成为常用的测定和不常用的测定.在美国最常用的六个方法,以应用多少为序排列如下:冷试验、人工加速老化实验、四唑实验、种苗生长速率、发芽速度、低温发芽实验。种子活力测定可用的方法有30～40种,现据T·M·Ching的分类,综合介绍如下: (一)物理性的测定 1.测种粒大小、比重、密度:测定粒大小的方法,可测每克种子的粒数;测千粒重;相对大小可测一定容积内的种子数或倒过来测一千粒所占的容积量.
Fourth, the determination of seed vigor ISely that vitality can be determined directly or indirectly in the laboratory.Direct determination is based on the relationship between the seed and the environment, to determine the simulation field conditions such as cold test. Indirect determination is to measure some of the physiological characteristics of the seed, such as enzyme activity. According to Grabe, Grabe advocates that vitality assays be divided into commonly used assays and less commonly used assays based on the routine work of the US Seeds Laboratory.Most of the six most commonly used methods in the United States, in terms of their application, are as follows: cold test, artificial accelerated burn test , Tetrazole experiment, seedling growth rate, germination speed, low temperature germination experiment. There are 30 ~ 40 kinds of methods available for determination of seed viability. According to the classification of T · M · Ching, the comprehensive introduction is as follows: (1) Physical determination 1. Measurement of grain size, specific gravity and density: Can measure the number of seeds per gram of seeds; measured 1000-grain weight; the relative size of a certain volume can be measured within the number of seeds or the amount of volume measured in reverse.