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以“达白1号”为材料,研究了不同施氮量不同基追肥比例对达州地区白肋烟农艺性状,产量和氮肥利用率的影响.结果表明施氮量和基肥比例对白肋烟的农艺性状、经济性状、干物质积累动态,都有不同程度的影响.随着施氮量的增加,白肋烟的产量、产值、上中等烟比例有增加趋势.0~210 kg.hm-2施氮量条件下,相同施氮量下随着基肥比例的减小,烟叶的产量、产值、上中等烟比例有增加趋势,当施氮量超过210 kg.hm-2时基追肥比例的影响效果不明显.从农艺性状、经济性状和氮肥利用率方面综合来看,以施氮量210 kg.hm-2为最好,255kg.hm-2次之,120 kg.hm-2最差,在施氮量为0~210 kg.hm-2,以基肥比例为40%最好,60%次之,80%最差.
The effect of topdressing rate of different nitrogen fertilizers on agronomical traits, yield and nitrogen use efficiency of burley tobacco in Dazhou area was studied using “Dabai 1” as experimental material.The results showed that the effects of nitrogen application rate and basal fertilizer ratio on Burley tobacco Agronomic traits, economic traits and dynamics of dry matter accumulation all have different degrees of influence.With the increase of nitrogen application, the yield, output value and the ratio of upper middle-grade tobacco have an increasing trend.O ~ 210 kg.hm- Under the same amount of nitrogen application, with the decrease of basal fertilizer proportion, the yield, output value and upper middle-grade tobacco leaf yield increased with the amount of nitrogen applied. When the nitrogen application rate exceeded 210 kg · hm-2, The effects of agronomic traits were not obvious.According to the agronomic traits, economic traits and nitrogen use efficiency, the nitrogen application rate of 210 kg.hm-2 was the best, followed by 255 kg.hm-2, and the worst of 120 kg.hm-2 , In the nitrogen application rate of 0 ~ 210 kg.hm-2, the best ratio of basal fertilizer 40%, followed by 60%, 80% of the worst.