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以6年生果实膨大后期‘赤霞珠’葡萄为试材,运用13C和15N标记技术,分别标记不同部位和节位的枝条叶片,研究碳氮营养吸收分配规律。结果表明:标记近主干和远主干枝条叶片,叶片合成的光合产物和吸收的氮素营养在近主干和远主干枝条之间不相互转运,近主干枝条上的果实对光合产物的征调能力强于远主干枝条上的果实,δ值(表示固定的13C同化物的量)是远主干枝条上果实的4.74倍;同一枝条不同节位的标记叶片距结果部位越近,果实的δ值和Ndff值越大,说明果实优先征调距果实近的叶片碳氮素营养;副梢保留6片叶所固定的光合产物总量和吸收的氮素营养总量均大于保留2片叶的,分别是其1.1倍和1.8倍。
Taking Cabernet Sauvignon grapes with 6-year-old fruit enlargement as test materials, 13C and 15N marker techniques were used to mark the branches and leaves of different positions and nodes to study the absorption and distribution of carbon and nitrogen. The results showed that the photosynthetic products and absorbed nitrogen nutrition of leaves were not translocated between near-main stems and far-stem branches, and the ability of fruits on near-main stems to recruit photosynthate was stronger The value of δ (indicating the amount of immobilized 13C assimilate) was 4.74 times as large as that of the fruit distal to the main branch. The closer the labeled leaves from different branches of the same branch to the fruit were, the δ value and Ndff value The larger the fruit, the higher the fruit priority is given to the leaf carbon and nitrogen nutrition; the shoots retained 6 leaves fixed total amount of photosynthate and total nitrogen uptake were greater than the retention of 2 leaves, respectively, its 1.1 Times and 1.8 times.