炭化烟草秸秆还田对连作植烟土壤及烤烟生长发育的影响

为了修复连作植烟土壤,丰富生物质炭在烟草生产中的生态学效应,加快烟草废弃物的综合利用,选择连作15 a、烟草青枯病发生严重的植烟土壤,通过大田试验,研究了炭化烟草秸秆对连作植烟土壤理化性状、微生物数量及烤烟生长发育的影响。结果表明,在连作植烟土壤中添加1 500 kg/hm~2炭化烟草秸秆,有利于改善土壤理化性质和养分状况,改变土壤微生物丰度,进而促进烤烟的生长,提高烟叶的产量,增加植烟的收益。

Influence of Carbonized Tobacco Stem on Physiochemical Properties of Continuous Tobacco-cropping Soil and Growth of Flue-cured Tobacco

Yunyan 87 was taken as the test tobacco variety, a field experiment was conducted on a soil with 15 a continuous tobacco-cropping and serious bacterial wilt in order to study the effects of carbonized tobacco stem (tobacco biochar) on soil physiochemical properties, microbial population and tobacco growth for restoring continuous cropping tobacco soil, further understanding the ecological effects of biochar on tobacco production, and accelerating the comprehensive utilization of tobacco waste. The results showed that compared with the treatment of conventional fertilization (CK), the treatment of CK+1 500 kg/hm² tobacco biochar could improve well soil physiochemical properties and nutrient status, promote soil microbial abundance, stimulate the growth of tobacco and increase the yield and earnings of tobacco.