东北寒地不同土质对玉米生长发育和耗水量的影响研究

以东北地区春玉米为试验对象,利用称重式蒸渗仪,采取相同的灌溉制度,研究不同土壤条件下玉米各生育期及全生育期的耗水规律并比较玉米生理指标的不同。结果表明,生育进程上,草甸土玉米生育期最短;生理生育指标上,草甸土株高最小但其光合速率和蒸腾速率及根系活力却最旺盛;耗水规律上,不同土质基本一致,黑土耗水量最大;产量上,黑土最大,草甸土最小。

Effects of Different Soil Property on Corn Growth and Water Consumption of Maize in Cold Area of Northeast

Taking the spring maize in northeast area as experiment object ,based on the weighing lysimeter and the same irrigation schedule ,the water-consuming law of the whole growth period and each growth period of maize are analyzed under different soil property condition and the the difference of maize physiological indexes are compared .The results show that the growth period of maize under meadow soil is the shortest ;the maize plant height under meadow soil is the smallest while the photosynthetic rate , transpiration rate and root activity are the most vigorous ;the water-consuming law of different soil property is basically identical and the water consumption is the highest under black soil ;maize yield under black soil is the highest while it is the lowest under meadow soil .