Simulation of Potassium Critical Content in Greenhouse Cucumber
NI Ji-heng1，FU Wei-guo1，ZHU Yong-li1，MAO Han-ping1，LUO Ke-yong2，ZHENG Hong-qian2，XU Gang3
1Key Laboratory of Modern Agricultural Equipment and Technology，Ministry of Education＆Jiangsu Province，Jiangsu University，Zhenjiang 212013，Jiangsu，China|2Institute of Atomic Energy Utilization in Agriculture，Jiangsu Academy of Agricultural Sciences，Nanjing 210014，Jiangsu，China|3Institute of Horticulture，Jiangsu Academy of Agricultural Sciences，Nanjing 210014，Jiangsu，China
Abstract：According to the relationship between potassium uptake，distribution，radiation and temperature，a simulation model for greenhouse cucumber potassium uptake and distribution was established．Different experiment data was used to validate the model．The results showed that the coefficients of determination between predicted and measured value based on the 1∶1 line were 0.96，0.71，0.78，0.85，0.87，respectively．And the root mean squared errors between the predicted and measured value were 0.25 g per plant，0.12%，0.09%，0.04%，0.05%，respectively，for potassium uptake，root，stem，leaf and fruit potassium content．This model could provide satisfactory predictions of phosphorus uptake and root，stem，leaf and fruit potassium content of greenhouse cucumber in different seasons.
