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在半干旱的辽西地区,旱作条件下的沙打旺和紫花苜蓿,不同播种时期的第一、二、三年产草量,均与播期的早晚存在极显著地负相关关系和回归关系。适期早播是获得高产的有效措施之一。
In the semi-arid western Liaoning area, the growth of alfalfa and alfalfa under the condition of dry cultivation were significantly negatively correlated with the sowing date in the first, second and third year of sowing . Early sowing is one of the effective measures to obtain high yield.