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夏甘薯生长前期末喷浓度为250ppm和500ppm的乙烯利,有控制茎叶徙长和提高薯块产量的作用。被处理的植株蔓长缩短,分枝数目增加;叶片变小、变厚,数目增多,叶片面积减少;生长中期,250ppm处理者叶面积系数比对照降低0.22,500ppm处理者比对照降低0.07;生长后期,250ppm处理者叶面积系数比对照增加0.8,500ppm处理者叶面积系数比对照增加0.4。处理叶片叶绿素、可溶性糖、游离氨基酸的含量有所增加,叶色深绿;光合效率有所提高,同化产物分配方向有所改变,向薯块内运输的量增加,平均叶片和茎及叶柄干重,250ppm处理者比对照降低2.9%和4.1%,500ppm处理者比对照降低0.6%和2.2%;平均薯块干重,250ppm处理才比对照增加9.1%,500ppm处理者比时照增加3.2%,薯块产量明显提高。500ppm处理者增产14%,250ppm处理者增产6%。
Early summer sweet potato spray concentration of 250ppm and 500ppm ethephon, stems and leaves to control the migration and increase the role of potato production. The number of branches was shortened and the number of branches increased; the leaves became smaller and thicker, the number increased and the area of leaves decreased; in the middle growing stage, the leaf area coefficient of 250ppm decreased by 0.22,500ppm than that of the control; In the later stage, the leaf area coefficient of 250ppm treatment increased by 0.8,500ppm than that of the control. The leaf area coefficient of treatment increased by 0.4 compared with the control. The contents of chlorophyll, soluble sugar and free amino acids increased, the leaf color became dark green, photosynthetic efficiency increased, the assimilation product distribution changed, the amount of transport to potato tuber increased, the average leaf and stem and stem The average weight of 250ppm treatment increased by 9.1% compared with the control, while that of 500ppm treatment increased by 3.2% compared with the control. , Tuber yield increased significantly. The yield increased by 14% for 500ppm and 6% for 250ppm.