有机肥碳氮比对土壤有机质组分及烟叶香气量的影响

Effects of C/N Ratio of Organic Fertilizer on Soil Organic Matter Fractions and Smoking Aroma Concentration

以云烟97为材料探索了腐熟有机肥碳氮比对植烟土壤有机质组分及烟叶香气量的影响。结果表明:施用不同碳氮比有机肥,其根际土壤有机质(SOM)、有机碳(SOC)、溶解性有机质(DOM)含量均随碳氮比的增加而增加;DOM组分中,以亲水性酸(HIA)组分比例最高,其次是亲水性中性物质组分(HIN),亲水性碱组分(HIB)比例略低于HIN;烤后中部烟叶香气量中,中性香气成分总量远大于酸性香气成分总量;烟叶中性香气成分总量随有机肥碳氮比的增加而表现出增加的趋势;DOM随着有机肥碳氮比的增加而显著增加,烟叶酸性香气成分和中性香气成分随有机肥碳氮比的增加呈同步增加趋势,但两者与碳氮比的增加无显著相关性,DOM与中性香气成分量亦没有显著相关性。

Using Yunyan97 as material,this paper has studied the effects of C/N ratio of decomposed organic fertilizer on organic matter fractions of tobacco-growing soil and smoking aroma concentration.The results showed that applying organic fertilizer with different C/N ratios caused the contents of soil organic matter(SOM),soluble organic carbon(SOC)and dissolved organic matter(DOM)in rhizosphere soil increased with the increase of C/N ratio;among DOM components,the proportion of hydrophilic acid(HIA)was the highest,followed by hydrophilic neutral substance(HIN),and the proportion of hydrophilic alkali(HIB)was slightly lower than that of HIN;the flue-cured tobacco leaves in the middle of the stem had moderate smoking aroma concentration with the total amount of neutral aroma components much larger than that of acidic aroma components;the total amount of neutral aroma components showed an increasing trend with the increase of C/N ratio of organic fertilizer;DOM increased significantly with the increase of C/N ratio of organic fertilizer;the total amount of acidic and neutral aroma components showed a synchronously increasing trend with the increase of C/N ratio of organic fertilizer,but both aroma components had no significant correlation with the increase of C/N ratio of organic fertilizer.There was also no significant correlation between the total amount of neutral aroma components and DOM content.