论文部分内容阅读
研究证明,土壤养分耗损后至少存在平衡与不平衡土壤养分类型,两种土壤养分类型种植玉米,均以氮磷配合施用效果最佳,且存在特定施肥比例,平衡类氮磷施用比例以1∶1较佳,不平衡类氮磷施用比例为1∶0.667。
The results showed that there was at least balanced and unbalanced soil nutrient types after soil nutrient depletion. Both corn and corn with different soil nutrient types had the best combination of N and P fertilization, and there was a certain proportion of fertilization. 1, the unbalanced nitrogen and phosphorus application ratio is 1: 0.667.