The comparative cold resistance of spring small grains
1934
Peltier, G.L. | Kiesselbach, T.A.
Seedling plants of oats, barley, and spring wheat proved more cold resistant when just emerging from the soil or in the one-leaf stage than in the two- or three-leaf stages. It is considered that the seedlings manifest the least cold endurance when the food reserves of the endosperm become exhausted. The data suggest that varietal differences as to hardiness may best be distinguished at this more susceptible stage of development. A greater degree of cold endurance resulted from exposure to a continuous than to an intermittent hardening temperature. In their order of cold endurance in the hardened seedling condition, the spring grains may be ranked as spring wheat, barley, and oats. Varieties within any one of these crops differ materially in their cold endurance. Equally good germination was obtained from these various spring small grains at low, medium, and high temperatures. Spring wheat germinates somewhat quicker than oats and barley at a low temperature.
显示更多 [+] 显示较少 [-]