Grain yield responses in wheat as affected phosphorus and the addition of sulphur, zinc, magnesium and copper

To develop a phosphorus response curve and investigate responses to sulphur, zinc, manganese and copper.本研究旨在构建磷响应曲线（phosphorus response curve），并针对硫（Sulphur）、锌（Zinc）、锰（Manganese）及铜（Copper）四种元素开展响应特征探究。