极早熟夏大豆品种中豆33、中豆34光周期反应特性研究

Study on photoperiod responses of extremely early-maturing summer-sowing soybean varieties Zhongdou No.33 and Zhongdou No.34

通过设置不同播期和光照处理,研究了中豆33和中豆34的光周期反应特性,并与其他品种进行了比较。研究结果表明,与早、中熟夏大豆品种相比,夏播时中豆33和中豆34全生育期较短,主要是因其生殖生长期较短,但仍然有较长的营养生长期。中豆33营养生长期对短日照更敏感,而中豆34生殖生长期对短日照更敏感。

Photoperiodisms of soybean varieties Zhongdou No, 33 and Zhongdou No. 34 were studied and compared with those of other soybean varieties under different sowing dates and day - lengthes. The results indicated that growing periods for both Zhongdou No. 33 and Zhongdou No. 34 sown in spring were shorter than those for varieties with early or middle - maturing sown in summer, mainly because of their shorter reproductive growth. The vegetative growth of Zhongdou No. 33 and the reproductive growth of Zhongdou No. 34 were sensitive to short day - length.