Simulation Model of Sunlight Greenhouse Tomato Dry Matter Distribution

According to the allocation index calculation principle,a dynamic simulation model for greenhouse tomato dry matter distribution in different organs was built.The aboveground parts(PISH),root(PIR),stem(PIS),leaf(PIL) and fruit(PIF) were calculated based on the simulation model:PISH=K1/[1+K2×EXP(-K3GDD2)],K1=0.99,K2=-0.175,K3=-0.0000001414 PIR=1-PISH;PIS=a1/[1+b1EXP(c1+d1GDD+f1GDD2)];a1=0.17,b1=-0.029,c1=0.078,d1=0.006397,f1=0.00000404;PIL=1-a2/[1+b2×EXP(c2+d2GDD2)],a2=0.06,b2=-0.527,c2=-0.03,d2=-0.000000714;PIF=1-PIL-PIS..The model was tested with the experimental data.The results showed that the greenhouse tomato dry matter partitioning dynamics simulated from the model were highly correlated with the tested values,and consistency,and therefore the model has a goog explanatory and predictive role.