单词photoperiodism
n.: 【生】光周期现象
网络: 光周期性；光周性；光周效应
【生物学】光周期现象
But there were obvious spring and strong photoperiodism tendencies among present big spike cultivars. These need to improvement.
近期育成的大穗品种多有明显的春性化、强感光性，需要加以改进。
Photoperiodism and Diapause: Seasonal Adaptation in Crickets of Japanese Islands
光周性和滞育：日本列岛蟋蟀的季节适应