草莓株体年生长动态的研究

将草莓分为无性株系和母体单株两类分別调查,則无性株系总鲜重、叶鲜重、叶面积增长动态皆为S型曲线,由此曲线公式可计算出最大生长速度出现时间为8月中下旬,并可求算出最大生长速度及最大速度时的生长量。无性株系的新根鲜重及吸收面积动态基本一致,皆为具三次波峰的曲线,高峰分别在4月中、7月下10月底出现,最后一次高峯持续时间较长。而无性株系的变(褐)色根的年动态变化为一开口向上的抛物线。母体单株的鲜重、地上部干、鲜重、叶鲜重等均为开口向下的抛物线;而其根鲜重年内有三次波峯,分別在4月中旬、7月上旬和10月下旬,以中间的波峯持续时间较长。

STUDIES ON YEARLY GROWTH OF STRAWBERRY

The results showed that the growth pattern of total fresh weight, leaf fresh weight and area of clonal plants appeared in "s" curves. On the basis of the curvilinear formula the highest growth rate which appeared in the second and last ten days of August and the highest growth rate and growth amount at this time could be calculated. The fresh weight and absorbtion area of new roots were basically the same, having a similar curve with three peaks which appeared in middle April, late July and at the end of October, respectivily, and the last peak continued longer. The yearly growth pattern of brown roots in clonal plants was parabolic (a>0). With the individual plants, the growth pattern of plant fresh weight, dry and fresh weight, above-ground part, and leaf fresh weight were parabolic (a>0). The fresh weight of roots in a year had three peaks appearing in middle April, early July and late October, respectively. The middle peak continued the longest time.