ALLOCATING LEAF NITROGEN FOR THE MAXIMIZATION OF CARBON GAIN - LEAF AGE AS A CONTROL ON THE ALLOCATION PROGRAM
ALLOCATING LEAF NITROGEN FOR THE MAXIMIZATION OF CARBON GAIN - LEAF AGE AS A CONTROL ON THE ALLOCATION PROGRAM
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DOI：
10.1007/bf00379710
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发表时间：
1983-01-01
期刊：
影响因子：
2.7
通讯作者：
FIELD, C
中科院分区：
文献类型：
--
作者：
FIELD, C
模拟使用的生物化学为基础的模型叶片光合作用，使人们有可能预测的分布叶片氮含量，最大限度地提高光合碳增益在整个植物的冠层。一般而言，最适氮含量随每日光合有效光子辐照度的增加而增加。叶老化在自然环境中往往产生叶氮含量是类似的最佳值，但有点更集群。在一片叶子的持续时间内，氮的再分配所涉及的成本小于增加光合作用的收益。如果N在较短的时间尺度上重新分配，成本可能会大于收益。
Simulations using a biochemically-based model of leaf photosynthesis make it possible to predict the distribution of leaf N contents that maximizes photosynthetic C gain over the canopy of an entire plant. In general, the optimal N content increased with increasing daily photosynthetically active photon irradiance. Leaf aging in natural environments tended to produce leaf N contents that were similar to the optimal values but somewhat more clustered. N redistribution over the duration of a leaf involves costs that are smaller than the benefits in increased photosythesis. The costs could become larger than the benefits if N were redistributed on a shorter time scale.