Dry matter accumulation showed a s curve at a slow-fast-slow rate.
干物质积累呈“S”型曲线，符合“慢-快-慢”的增长规律。
The results show that ENTEC plays lesser role on the dry-matter accumulation than urea. The time of maximum growth rate of A.
结果表明：与尿素处理相比，ENTEC对提高剌苋干物质积累作用不明显，其最大生长速率出现时间较晚；
Results showed that nitrogen fertilization rate significantly affected tobacco plant growth, leaf SPAD value, dry matter accumulation, leaf yield, economic value as well as chemical components.
结果表明：在绿肥全部还田条件下，不同氮肥用量对烤烟株高、烟叶spad值、烟株干物质累积以及烤后烟叶产量、产值和化学成分均有一定的影响。
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