红壤翻压绿肥对烟草农艺性状及线虫危害的影响

通过2种化肥用量、5种翻压绿肥量组成的10个处理田间小区试验,研究云南红壤翻压绿肥量对烟草农艺性状及线虫危害的影响。结果表明,烟草叶片大小、株高、茎粗与翻压绿肥量呈显著或极显著正相关;烟草采收末期,红壤寄生性线虫和非寄生性线虫数量随着翻压绿肥数量的增加而趋于增加,烟草根结线虫危害级别与翻压绿肥量呈极显著负相关。因此,翻压绿肥改善了烟草养分供给,促进了烟草生长,增强了烟草抗御线虫危害的能力,对烟草根结线虫危害起到了防治作用。生产上通常翻压绿肥15 000 kg/hm2,以达优质适产。

Effect of green manure application on agronomic characters and nematodes harm of tobacco in red soil

To explore the effect of green manure application on agronomic characters of tobacco and decrease nematodes harm to tobacco replant,a field plot experiment,with ten treatments which were assembled by two levels of chemical fertilizer and five levels of green manure,was conducted in red soil in Yunnan.Results showed that leaf size,plant height and stem diameter of tobacco were significantly or extreme significantly positive correlated to the amount of green manure application.With the increasing of green manure application amount,the quantity of parasitic nematodes and non parasitic nematodes tended to increase in red soil at the end of tobacco harvesting,but the degree of nematodes harm to tobacco root was extremely significantly negative correlated to the amount of green manure application.In summary,green manure application could promote tobacco growth and resist parasitic nematodes harm by nutrients supply improvement.In agricultural practice,15 000 kg/hm2 of green manure was usually applied for achieving proper and high quality flue cured tobacco product.