Silicon Promotes Agronomic Performance in Brassica napus Cultivated under Field Conditions with Two Nitrogen Fertilizer Inputs.

摘要: To limit the environmental pollution associated with intensive nitrogen (N) fertilizer usage, alternative cultural practices must be considered for crops requiring high N inputs such as rapeseed. In this context, effects of silicon (Si) supply on agronomic performance rapeseed cultivated under field conditions two levels (60 and 160 kg ha-1) were studied. Results showed that Si supplied in form silicic acid (12 has no effect plants lower input. contrast, fertilized ha-1, promotes preservation green leaves (until flowering stage) at harvest stage, increases biomass, yield, seed micronutrient concentrations (especially cobalt iron). The indexes show increase yield is related to a better uptake from soil by Si-treated plants, but not an improvement mobilization towards seeds. This study combined (160 improves usage yield. possibility could allow reduction input without altering discussed.