| 
		黄土高原不同地点小麦籽粒矿质元素的含量差异
		 | 
| 
			Differences of Main Nutrient Concentration in Wheat Grain Between Typical Locations of the Loess Plateau
			 | 
| 图4. 两个地点的旱地冬小麦铁、锰、铜、锌含量,吸收量和养分收获指数 | 
| Fig. 4. Winter wheat grain Fe, Mn, Cu and Zn contents, and their uptake and harvest indexes at two experimental sites | 
|  |