高光低温气候条件下三种禾谷类作物的光合特性研究

摘要

采用光合仪监测河北坝上地区玉米(Zea mays L.)、谷子(Setaria italica)、莜麦[Avena chinensis(Fisch.ex Roem.et Schult.)Metzg.]的光合日变化及其季节动态.结果明确了高光低温环境下喜温型禾谷类作物的光温生态适应性,发现在该地区的特殊气候条件下,作物的收获目标要根据其温感型来确定,禾谷类喜温型作物以收获茎叶等营养器官为主,喜凉型作物以收获子粒等生殖器官为主.由此,可以推广种植饲用玉米,以达到资源利用的最大化,扩大区域引种选择范围的目的.%Diurnal and seasonal variation of photosynthetic parameters were measured in maize (Zea mays L.), millet (Setaria italic) and naked oats [Avena chinensis (Fisch. ex Roem. et Schult.) Metzg.] in Bashang district in Hebei Province. Ecologi-cal adaptability characters of light and temperature for these thermophilic cereals were found under high light and low temper-ature condition. The results showed that harvest target of these crops should be determined by their sensitivities to temperature under this special climate. Harvest priority should be given to vegetative organs such as stems and leaves for thermophilic type crops, and seeds for cool-loving crops. The results demonstrated that spread of feed maize could improve resource uti-lization and expand the range of regional introduction options in this district.