影响河北核桃净光合速率日变化的主要因子是光合有效辐射、叶片温度及胞间CO_2浓度。
The diurnal variation of Pn in hebei-walnut was influenced by light intensity, leaf temperature and intercellular CO2 concentration.
利用这一模型可对河北省山区核桃立地质量进行数量化评价，为河北省山区核桃的栽培生产管理提供了理论依据。
Using this model to appraise the Hebei province mountainous area walnut vertical quality, it provided the theory basis for Hebei province mountainous area walnut management of cultivation production.
利用这一模型可对河北省山区核桃立地质量进行数量化评价，为河北省山区核桃的栽培生产管理提供了理论依据。
Using this model to appraise the Hebei province mountainous area walnut vertical quality, it provided the theory basis for Hebei province mountainous area walnut management of cultivation production.
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