长期施用有机堆肥对土壤性状与烟叶质量的影响

通过田间试验研究不同配比的有机堆肥对烟叶生长的影响,确定有机堆肥的配比,在此基础上,采用近20年的长期定位施用有机堆肥试验,研究其对土壤理化性状与烟叶内在化学成分的影响,结果表明:厩肥用量600 kg/亩与复合肥量30 kg/亩配比对烤烟的生长发育最为有利,能合理供应烤烟大田生长所需要的养分;经过近20年的定点试验证明,施用有机堆肥土壤有机质含量由1989年的16.5 g/kg上升到了2007年的18.9 g/kg,土壤CEC上升了1.76％,达到11.81 cmol/kg,土壤容重从1.22 g/cm3降到了1.09g/cm3左右,土壤的总孔隙度、毛管孔隙度和田间持水量,分别提高了3.7％、5.0％和3.0％;施用适量的有机堆肥使得烟叶化学成分协调,烟碱、总糖、总氮控制在适宜的范围内.

Effects of continued application of organic compost on soil property and tobacco leaf quality

Effects of organic compost on physical and chemical properties of soil,and chemical composition of tobacco leaves were investigated with experiments from 1989 to 2007.Results showed that applying 600 kg/mu manure with 30 kg/mu fertilizer was the best combination for tobacco growth.After almost 20 years of applying organic composts,organic matter content in soil increased from 6.5 g/kg to 18.9 g/kg;soil CEC increased by 1.76% to 11.81 cmol/kg;average soil bulk density decreased from 1.22 g/cm3 to 1.09 g/cm3;soil total porosity,capillary porosity and field capacity increased by 3.7%,5.0% and 3.0% respectively.Continued application of moderate composts helped to stabilize chemical compositions in tobacco leaves.