| The influence of main cultivation factors such as seeding depth, potassium application rate and sowing density on fodder beet was studied with quadratic orthoganol regression design method. It was shown that their effect on the yield of fodder beet could be ranked as sowing depth> sowing density >potassium under low level of sowing density and potassium, and sowing depth > potassium> sowing density under high level of sowing density and potassium. The factor composition for a theoretical yield upon 9861 kg/666.7m2 or more was: sowing depth 3 cm, potassium 20 kg/666.7m2, and sowing density 8800 plants/666.7m2.The simulation result showed that the optimal factor composition for high yield of fodder beet was: sowing depth 34 cm, potassium 2030 kg/666.7m2, and sowing density 6 0008 000 (plants/666.7m2.) |