Effect of Different Preceding Crops on Soil Health of Flue-cured Tobacco
DONG Ningyu
JIAO Yongji
YANG Jianxin
WANG Yong
JIANG Shijun
Abstract：For the soil samples of tobacco field with different previous crops in Sanmenxia area ,the soil micro-ecological health ,including the number of nitrogen function bacteria ,the enzyme activi-ty and the content of organic carbon ,was analyzed .The results showed that the trend of bacteria number ,organic carbon content ,sucrose enzyme activity and cellulose enzyme activity was same , and the order was sweet potato>oil-seed rape>chilli>corn>tobacco .The previous crops had the following sequence according to the amylase activity :sweet potato>corn>rape>chilli>tobacco . As for soil organic carbon content ,only sweet potato ,chilli and rape reached the requirements of high quality tobacco production while the organic carbon content of corn and tobacco soils was low .The analysis of function bacteria showed that the ammonification bacteria ,nitrification bacte-ria ,nitrogen-fixing bacteria and denitrifying bacteria of chilli ,sweet potato ,corn and tobacco were the most .The difference from the stubble ,to a certain extent ,affected the change trend of nitro-gen transformation bacterial colony group quantity ,among them ,the sweet potato ,rape ,chilli stubble more conducive to soil NO3- (suitable for root absorption ) transformation .Overall ,com-pared with continuous crops ,the soil health indicators of crop rotation remain at a high level , w hich is helpful to maintain soil quality and can relieve the continuous cropping obstacles effec-tively in tobacco field .
Keywords：preceding corpstobaccosoil health mechanismbacteriaorganic carbon
Publication Date：2013-10-01
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：5( 46-50 )