| The result of studying the radish nutrient uptake under different soil matric potential condition showed that the concentration of nutrient tended to decrease from 35 days to 75 days during radish development. At the harvest time, the N、P content in radish roots and K in leaves decreased with soil matric potential rising. The absorption and accumulation of N、P、K elements varied in different growth periods and soil matric potential did affect radish growth and nutrient uptake, but the difference is not very significant after sowing 55 days. However, when radish growing 75 days accumulation of N, P, K were highest on the condition that the soil water potential was controlled between -25 to -35 kPa, which can improve nutrient uptake and efficienticy. |