摘要
研究了黑钙土不同施氮水平下,烤烟干物质的积累以及分配规律。结果表明：黑钙土上烤烟的干物质积累随施氮量的增加而增加,且主要在旺长期内完成;而干物质在根、茎、叶的分配比例受施氮量的影响较小,虽各处理之间无明显规律,但均表现为叶＆gt;茎＆gt;根;根、茎、叶干重最终占烟株干重的比例分别为18.6%-19.7%,28.1%-29.3%和79.8%-81.8%;研究还表明过低的施氮量也不利于烤烟经济效益的提高,因此建议施氮量控制在52.5-67.5 kg.hm^-2之间比较好。
The results from the field test in 2008 showed that dry matter accumulation of flue-cured tobacco was mainly com pleted in vigorous growth stage and increased with the enhance of nitrogen fertilizer. The proportion of distribution of dry matter in root,stem,leaves was leaves 〉 stem 〉 root,but was affected slightly by nitrogen levels and showed no apparent law among the different treatments. The final proportion of dry matter of root, stem and leaves in plant was18. 6 %- 19. 7% , 28. 1% -29. 3% and 79.8% -81.8% . The results also indicated that low nitrogen fertilizer was no good for the economic benefits increasing,so the better nitrogen fertilizer level was between 52. 5 kg · hm ^-2 and 67.5 kg · hm^-2 was suggested.
出处
《黑龙江农业科学》
2009年第6期63-65,共3页
Heilongjiang Agricultural Sciences
基金
黑龙江八一农垦大学博士科研启动金项目
关键词
烤烟
干物质
积累分配
产质
黑钙土
flue-cured tobacco
dry matter
accumulation and distribution
yield and quality
chernozem
