PROBLEM TO BE SOLVED: To provide a method for predicting photosynthesis in a turf grass clump in high accuracy.SOLUTION: The method for predicting photosynthesis in a turf grass clump includes: a step for obtaining weather data in which weather data around the turf grass clump are obtained a step for setting the environment for the turf grass clump in which respective data regarding the shape of the turf grass clump, leaf properties and soil properties are settled a step for calculating the irradiation environment in which a part upper than the ground for the turf grass clump is divided into a plurality of layers in a vertical direction to calculate the environment for light irradiation in the respective layers of the turf grass clump based on the respective data in the step for obtaining weather data and the step for setting the environment for the turf grass clump a step for calculating layer elements in which leaf stomatal conductance, foliar boundary layer conductance, sensible heat flux and latent heat flux with respect to each of the layers when the leaf temperature of each of the layers and the ground temperature turn into a temperature corresponding to the irradiation environment and a step for calculating the photosynthesis amount in which the photosynthesis amount in each of the respective layers is calculated based on the calculated results in the step for calculating the irradiation environment and the step for calculating layer elements.COPYRIGHT: (C)2012,JPO&INPIT【課題】精度の高い芝草群落の光合成の予測方法を提供する。【解決手段】芝草群落における光合成の予測方法であって、芝草群落周辺の気象データを取得する気象データ取得ステップと、芝草群落の形状、葉の特性、及び土壌の特性に関する各データを定める芝草群落環境設定ステップと、芝草群落の地面以上の部分を鉛直方向に複数の層に分け、気象データ取得ステップ及び芝草群落環境設定ステップの各データに基づいて、芝草群落の各層の光の放射環境を算出する放射環境算出ステップと、各層の葉温及び地面温度が放射環境に応じた温度になるときの葉の気孔コンダクタンス、葉面境界層コンダクタンス、顕熱フラックス、潜熱フラックスを層毎に算出する層要素算出ステップと、放射環境算出ステップの算出結果、及び、層要素算出ステップの算出結果に基づいて、各層の光合成量を算出する光合成量算出ステップと、を有する。【選択図】図1
