Stoichiometric & Kinetic Modeling of Rubisco Carboxylation Efficiency under CO2 Enrichment
Atmospheric CO2 enrichment to 1,000 ppm in semi-closed greenhouses elevates sub-stomatal CO2 concentration (C_i) from 280 ppm to over 720 ppm, suppressing Rubisco oxygenation (V_o) by 68%. Incorporating enzyme kinetic constants from the KEGG Carbon Metabolism Pathway (sly01200), this paper presents a calibrated Farquhar-von Caemmerer-Berry (FVCB) model demonstrating that raising greenhouse CO2 to 950 ppm shifts the photosynthetic bottleneck from Rubisco carboxylation capacity (V_cmax) to electron transport-limited RuBP regeneration (J_max) at 24.5°C, yielding a net dry matter accumulation gain of +28.4%.
Global Climate Strategy
🌍 High-Density Glasshouse with Liquid CO2 Injection
Dosage algorithm: Inject pure liquid CO2 to maintain ambient CO2 at 900 ppm during active PAR (> 300 W/m²). Automatically ramp down injection when vent aperture exceeds 25% to minimize gas wastage.
⚙️ Tech Level: Tier 4 High-Efficiency CEACrop Steering Parameters
CO2-PAR temperature coupling matrix for maximum net assimilation rate (A_net).
Fertigation Strategy
Nitrogen demand scaling under elevated CO2 carboxylation rates.
Phase 1: Vegetative Vigor
Increase total Nitrogen dosing by +15% (NO3⁻ 16.5 mM) to support elevated synthesis of Rubisco proteins (which comprise up to 50% of soluble leaf protein).
Phase 2: Generative / Brix Steering
Balance Potassium Nitrate [PubChem CID 24434] (K 6.0 mM) to facilitate stomatal opening under elevated ambient CO2 levels.
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