Application Ratio of NH4+ -N to NO3- -N on Growth and Quality of Flue-cured Tobacco in Middle of Henan Province
WANG Meng
WANG Xizhi
LIU Shiliang
ZHU Jinfeng
ZHANG Hong
LIU Fang
JIANG Guiying
Abstract：To explore the appropriate ratio between ammonium nitrogen(NH4+-N) and nitrate nitrogen ( NO3--N) on tobacco in Henan province,four treatments with different combination of NH4+-N and NO3--N [ NH4+-N/NO3--N=6: 4 ( T1 ), 5: 5 ( T2 ), 4: 6 ( T3 ) and 3: 7 ( T4 ) ] were carried out in field experiment. All the treatments were based on same rate of nitrogen,potassium and phosphorus. This study focused on the influence of different nitrogen form on the agronomic traits, chemical components and aroma content of flue-cured tobacco. The results showed that the agronomic traits including leaf length, leaf width,leaf area and stem girth demonstrated first rising and then dropping as the NO3--N increased, and the highest value appeared in T3 treatment on the 30 and 45 days after transplanting. At the mature stage(90 days after transplanting),there was no significant difference among the treatments in the height and leaf width of tobacco, while the leaf length and leaf area decreased with increase of NO3--N. The difference of the content of total nitrogen ( TN ), total phosphorus ( TP ) and total potassium ( TK ) in tobacco leaves under different nitrogen form combination during all the growth stage illustrated that it promoted tobacco to absorb more N,P,and K under NH4+-N/NO3--N=4:6(T3 treatment). The NO3--N retarded the accumulation of total sugar, reducing sugar, total nitrogen, chloridion, while the NH4+-N improved the carbon and nitrogen metabolism in tobacco leaf. The TK content in tobacco leaf first rose and then dropped with increase of NO3--N ratio,and it was significantly higher under T3 treatment(1. 34%) than under other treatments, which indicated that the NO3--N contributed to absorption of more K by tobacco leaf. The analysis of aromas component found that NO3--N could promote the content of cartenoid degradation products in flue-cured tobacco leaves. The content of cembranenoids and browning reaction products in tobacco leaf was highest under the treatment with NH4+-N/NO3--N=4:6. Generally,based on the characters of the agronomy traits,chemical and aromas component of tobacco,the NH4+-N/NO3--N=4:6 was suggested as the optimal combination for tobacco in middle of Henan province.
Keywords：nitrogen formyieldtobaccochemical componentaromas component
Publication Date：2016-04-01
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：6( 37-42 )