Managing nutrition on sandy soils – yield gains from Zn and N

To explore the effects of nitrogen, sulfur and zinc on wheat productivity. The treatments included a range of N, S and Zn based treatments which were designed to address whether;1) Constraints to productivity on sands could be managed by manipulating the nutrition package,2) Early application of N is the most profitable option,3) Zn is a constraint to yield and if the source of Zn is important, and4) S is a constraint to yield and if the source of S is important.

为探究氮（Nitrogen）、硫（Sulfur）与锌（Zinc）对小麦生产力的影响。本试验设置了一系列基于氮、硫、锌的施肥处理，旨在解答以下四个科学问题：
1. 沙质土壤上的小麦生产力限制因子能否通过调控养分配套方案得到缓解；
2. 早期施用氮肥是否为经济效益最优的施肥选择；
3. 锌元素是否为产量限制因子，且锌肥的施用来源是否对试验结果存在重要影响；
4. 硫元素是否为产量限制因子，且硫肥的施用来源是否对试验结果存在重要影响。