Optimising sulphur and nitrogen nutrition in canola

This project aims to determine if nitrogen supply is limiting uptake of sulphur in canola crops grown in the Riverine Plains region and whether sulphur uptake and yield is increased in canola when nitrogen is available in non-limiting quantities.The 2017 project trial assessed the response to nitrogen and sulphur in canola crops of the Riverine Plains by determining:• the influence of nitrogen and sulphur application on canola tissue content, yield and oil• the fluctuation in nitrogen and sulphur content and nitrogen:sulphur ratio in the plant from stem elongation (GS31) to harvest (GS99)• the optimum available soil nitrogen level for the region’s canola crops at varying sulphur application rates.

本项目旨在探明河流平原（Riverine Plains）区域种植的油菜作物中，氮素供应是否会限制硫素吸收，同时探究当氮素供应充足时，油菜的硫素吸收量与产量能否得到提升。2017年的项目试验通过测定以下内容，评估了河流平原地区油菜对氮素与硫素的响应：• 氮素与硫素施加对油菜组织养分含量、产量及油脂含量的影响；• 从茎伸长阶段（GS31）至收获阶段（GS99），植株体内氮素、硫素含量及氮硫比的动态变化；• 不同硫素施加水平下，该区域油菜作物所需的最优土壤有效氮素水平。