翻压绿肥对植烟土壤理化性状及烤烟常规化学成分的影响

Effects of Green Manure Application on Soil Physical and Chemical Properties and Chemical Composition of Flue-cured Tobacco Leaves

研究了黑麦草不同翻压量对植烟土壤理化性状的影响。结果表明,翻压黑麦草的各处理均能够明显改善土壤的理化性状,提高烟叶品质,其中以翻压量为22 500 kg/hm2的综合效果最好。与对照相比,22 500 kg/hm2翻压量的处理在烟株移栽后30 d时土壤容重降低了0.064 g/cm3,土壤孔隙度和土壤含水率分别提高了2.48%和3.71%;在烟株整个生育期,土壤有机质、碱解氮、有效磷、速效钾含量分别提高了12.18%～30.84%,6.82%～21.46%,62.19%～119.20%,40.02%～85.44%,烟叶品质指标相对其他处理更优。翻压黑麦草的各处理均能够较好的调节土壤的pH值,改善土壤理化性状,表明翻压黑麦草后土壤生物过程活跃,有利于土壤有机物质的转化和烤烟正常生长所需的营养供应。

Through a field experiment to study the effects of different ryegrass applicaton rates on soil physical and chemical properties and quality of flue-cured tobacco leaves,results showed that：buring ryegrass could improve soil physical and chemical properties and quality of flue-cured tobacco leaves,Compared with the control,the treatment of buring 22 500 kg/ha was the most obvious,The treatment of which could reduce soil bulk density by 0.064 g/cm3,increase soil porosity and soil water content by 2.48% and 3.71% at the 30th days after transplanting,In addition,the treatment could increase soil organic matter,available N,available P,available K by 12.18%-30.84%,6.82%-21.46%,62.19%-119.20%,40.02%-85.44% respectively,improve soil perviousness and soil retention of water and fertilizer,improve quality of flue-cured tobacco leaves,The promotion of enzyme activity was of great advantage to the turnover of organic matter and provision of nutrition to meet the needs of tobacco′s regular growth.