不同生物质炭施用量对烤烟相关性状的影响研究

Research on Effects of Different Biochar Dosage on Correlated Traits of Flue-cured Tobacco

针对衡阳市烟区长期连作及不合理施肥造成的土壤质量持续下降等因素,通过施用稻壳生物炭等技术措施,开展其对烟田土壤修复效果研究。结果表明:烟苗移栽前穴施稻壳生物炭12 000 kg/hm2,可使采收后烟田土壤中碱解氮、速效钾、最大田间持水量分别增加17.55%、36.29%、6.51%,土壤容重降低0.033 g/cm3,明显提升上等烟叶比例;对烟株生长发育、农艺性状、烟叶产值、经济效益等具有一定的改善与提升,而且未发现其对烟株生长产生任何不利影响。

Aim to soil quality deterioration caused by continuous cropping obstacle and absurd fertilizing in Hengyang tobacco area,the study investigated the repairing effects of biochar on deteriorated tobacco soil. The main results showed that alkaline hydrolysis N,available K,maximum water capacity had increased by 17.55%,36.29%and 6.51%before transplanting under 12 000 kg/hm2 biochar was applied,respectively,and the soil bulk density reduced 0.033 g/cm3,moreover,the ratio of first-class and middle-class leaves significant increased as well. In addition,biochar application had improved the growth,agronomic traits,leaf-profit on different degree in flue-cured tobacco production instead of any adverse impacts.