关键词: 过渡型小麦品种；早播；生育阶段；温光互作；生态适应性

Abstract: The wheat ecological experiment was conducted during 1988￣1990. Transition type wheat varieties were sown in early spring in Heihe, Huhhot, Lanzhou, Urumqi and in early winter in Kunming and Guiyang in southwest China. All the wheat sown grew normally. In comparison with the local spring wheat varieties, the maturity period was very close with little variations. During the 3 growth phases of vegetative growth, vegetative reproductive growth and reproductive growth, the transition type wheat varieties demonstrated a “two long and one short” phenomenon (long short long) in Heihe, Huhhot, Lanzhou and Urumqi, while those in Kunming and Guiyang demonstrated a “three long” phenomenon. There was a wide temperature range for field vernalization, ranging from 0℃ to 15℃ in daily mean temperature. Before inflorescence, the day length requirement was not strict. There existed a great significant negative correlation between the days from tillering to heading and the “average” light temperature accumulation, displaying a temperature light interaction effect. Under certain temperature ranges, the days between heading and maturity had significant negative correlation with daily mean temperature. In comparison with spring type wheat varieties, transition type wheat varieties had higher 1000 grain weight. It was concluded from the results of experiment that the transition type wheat varieties had a fairly wide ecological adaptability in terms of growth and development.

Key words: Transition type wheat varieties, Transition type wheat varieties, Early sowing, Growth and development phase, Temperature light interaction, Ecological adaptability