摘要
在不同的施氮水平下,对湘东烟区烤烟干物质的积累规律进行了初步的研究。结果表明,在每公顷施纯氮127.5 kg的水平下,根、茎、叶干物质积累量较高,到圆顶时分别为78.20,74.66和128.48 g,相对增长量分别是不施氮处理的4.33,2.967和1.355倍,相对增长速度分别为2.060,1.819,2.198 g/d,说明在当地的气候条件下,在每公顷施127.5 kg纯氮的条件下,烤烟有较高的生物学产量。
A preliminary research on dry matter accumulation trend of flue-cured tobacco was conducted under different nitrogen application rate in East Hunan. The results showed that dry matter accumulation amount of roots,stems and leaves were greater under condition of N 127.5 kg/hm^2,and they were 78.20,74.66 and 128. 48 g/plant respectively at roundshape stage. The relative increment was 4. 33,2. 967 and 1. 335 times to that of no N treatment respectively,and the relative increasing speed was 2. 060, 1. 819 and 2. 198 g/d respectively. So application N 127. 5 kg/hm^2 could bring flue-cured tobacco a higher biological yield under conditions of local climate.
出处
《作物研究》
2007年第1期22-23,27,共3页
Crop Research
关键词
烤烟
施肥
氮
干物质积累
Flue-cured tobacco
Fertilization
Nitrogen
Dry mater accumulation
