时间变动 meaning in Chinese

temporal fluctuation
time fluctuation

The direct seeding experiments of different pteris vittata genotypes showed that there was significant difference in germination and emergence traits among pteris vittata genotypes collected from different areas in china , with germinating time ranging from 12 - 40 days , duration from germination to emergence varying between 13 - 46 days . as the seeds of pteris vittata are very small , with little stored nutrition , the genotypes , which are quick in germination and emergence , are suitable for direct seeding in the field
不同基因型的蜈蚣草的直接播种试验研究表明，来自我国不同地区的蜈蚣草基因型在萌发特性有显著差异，萌发时间变动在12 - 40d之间，萌发到成苗时间变化在13 - 46d 。因为蜈蚣草种子小，贮藏的营养物质少，故具有快速萌发和成苗特性的基因型易于田间直接育苗。