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多年生黑麦草刈后2 d 内,其再生草各器官中的碳水化合物主要来源于残茬,刈后3 d内,再生器官中的氮素也是主要来源于残茬。刈前根部贮藏的碳水化合物和氮素对再生的贡献小于残茬。刈割3 d 后,根中新吸收的氮素和残茬内新同化的碳水化合物迅速增加,再生器官中,以新同化的碳水化合物和新吸收的氮素占绝对优势。在植株再生中,叶片生长区内刈前贮藏的碳水化合物和氮素下降的程度大于残茬和根部,其中,贮藏的氮素下降持续的时间长于贮藏的碳水化合物。高频率的刈割强烈地干扰了多年生黑麦草的能量贮藏和氮素平衡。
Within 2 days after perennial ryegrass, the carbohydrates in the organs of regenerated grass mainly came from the stubble. Within 3 days after the pollination, the nitrogen in the regenerated organs mainly came from the stubble. Carbohydrates and nitrogen stored at the root of the karst plant contributed less to regeneration than the stubble. After 3 days of cutting, the newly assimilated nitrogen and residual assimilated carbohydrates rapidly increased in the roots, and the newly assimilated carbohydrates and newly absorbed nitrogen accounted for the absolute superiority in regenerating organs. During plant regeneration, the storage of carbohydrates and nitrogen in the leaf growth zone was greater than that in the stubble and the roots, and the storage of nitrogen decreased longer than the storage of carbohydrates. High-frequency mowing strongly interfered with the energy storage and nitrogen balance of perennial ryegrass.