PLANT-GROWTH ANALYSIS - TOWARDS A SYNTHESIS OF THE CLASSICAL AND THE FUNCTIONAL-APPROACH
PLANT-GROWTH ANALYSIS - TOWARDS A SYNTHESIS OF THE CLASSICAL AND THE FUNCTIONAL-APPROACH
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DOI：
10.1111/j.1399-3054.1989.tb06175.x
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发表时间：
1989-02-01
影响因子：
6.4
通讯作者：
POORTER, H
中科院分区：
文献类型：
--
作者：
POORTER, H
本文提出了一种计算相对生长率和净同化率的方法。该方法是基于拟合的多项式通过相对生长速率值计算的“经典”的方法，而不是通过在“功能”的方法中转换的植物重量。额外的方式减少收获到收获的变化特征的经典方法进行了讨论。与泛函方法相比，本方法的主要优点是：（1）多项式的次数可以增加（在一定限度内），而不会引起RGR的虚假波动。因此，可以描述RGR中相当复杂的趋势。(2)在实验的不同部分中，RGR值之间的干扰很小。相对于经典方法的主要优点是：（1）抑制了RGR的不稳定波动。(2)由于允许频繁的小收获，每次收获的工作量可以减少，可以获得更可靠的RGR个体遗传漂变的印象。(3)RGR由连续函数描述，从而便于进一步的计算和编译。
A method of calculating relative growth rates (RGR) and net assimilation rates is presented. The method is based on the fitting of a polynomial through the relative growth rate values calculated by the ''classical'' approach rather than through the In-transformed plant weights as in the ''functional'' method. Additional ways of reducing the harvest-to-harvest variation characteristic of the classical approach are discussed. The main advantages of the present approach over the functional one are: (1) The degree of polynomial can be increased (within certain limits) without inducing spurious fluctuations in RGR. Thus, quite complex trends in RGR can be described. (2) There is little interference between RGR values in different parts of the experiment. The main advantages over the classical approach are: (1) The erratic fluctuations in RGR are dampened. (2) As frequent small harvests are allowed, the workload at each harvest can be diminished and a more reliable impression of ontogenetic drift in RGR can be obtained. (3) RGR is described by a continuous function, thus facilitating further calculations and compilations.