Validation of a Photosynthesis Model through the Use of the CO2Balance of a Greenhouse Tomato Canopy
Validation of a Photosynthesis Model through the Use of the CO2Balance of a Greenhouse Tomato Canopy
复制标题
通过使用温室番茄冠层的二氧化碳平衡来验证光合作用模型
DOI：
10.1006/anbo.1999.0938
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发表时间：
1999
期刊：
影响因子：
4.2
通讯作者：
L. Gauthier
中科院分区：
文献类型：
--
作者：
H. Zekki;C. Gary;A. Gosselin;L. Gauthier
摘要/ Abstract摘要：通过生长室内的良好控制实验，建立了几种叶片光合作用模型。但是，只有少数在温室条件下被证实在数量和质量上是适当的。本文对番茄作物（Lycopersicon esculentum Mill）在半商业化温室（615平方米）中进行了一段时间的净光合速率测量。利用结合Acock模型进行光合作用计算的TOMGRO模型模拟净光合作用，同时测量了气候条件和LAI。从模拟和敏感性分析来看，净光合作用的预测对量子利用效率非常敏感。使用原始参数的Acock模型低估了净光合速率，但量子利用效率增加10%则得到了很好的拟合。为了推广模型的有效性，进行了残差分析，并显示了与冠层截获的光强相关的系统偏差。使用马夸特算法调整我们的数据以适应模型，但没有消除新参数值方差的剩余异质性。根据收集到的数据，采用的拟合优度标准表明，光合作用模型在描述温室农业系统CO 2平衡方面存在不足。然而，人们确定它可以作为一个更复杂的模型中的子模型来预测生长和发育。
Abstract Several leaf photosynthesis models were developed from well controlled experiments in growth chambers. However, only a few have been validated under greenhouse conditions for their quantitative and qualitative adequacy. In this paper, rates of net photosynthesis for a tomato crop ( Lycopersicon esculentum Mill) were measured in a semi-commercial greenhouse (615 m 3 ) for a significant time period. Concomitant measurements of climatic conditions and LAI were used for simulation of net photosynthesis using the TOMGRO model which integrates Acock's model for photosynthesis calculations. From simulations and from sensitivity analysis, the prediction of net photosynthesis appeared to be very sensitive to the quantum use efficiency. The Acock model with original parameters underestimated the net photosynthesis rate, but an increase in the quantum use efficiency by 10% gave a good fit. In an effort to generalize the validity of the model, a residual analysis was performed and showed a systematic bias related to light intensity intercepted by the canopy. The Marquardt algorithm was used to adjust our data to the model but did not eliminate residual heterogeneity of variance with new parameter values. On the basis of collected data, the criteria of goodness of fit used showed that the photosynthesis model is inadequate in describing the CO 2 -balance of the greenhouse agrosystem. However, it was determined that it could be used as a submodel within a more complex model for predicting growth and development.