稻壳掺播对土壤质地及烟叶生产的影响

Effects of Rice-husk on Soil Texture and Tobacco Production

皖南烟区土壤主要为水稻土,质地偏黏,不利于烟叶生长,为此,在宣城烟区耕作层土壤中掺播一定体积比例的稻壳,探讨其对土壤质地和烟叶生产的影响。结果表明:①随着掺播稻壳比例的增加,0.02～2mm的土壤颗粒和土壤有机质含量增加,土壤体积质量(容重)、含水量和pH降低,但这种趋势随着时间推移而逐渐减缓。②烟田耕作层土壤掺播稻壳总体上有利于烤烟生长,能够提高烟叶产量和品质,经济效益也明显提高。其中以掺播20%～30%的稻壳(稻壳体积/土壤体积)时烤烟的农艺性状、经济性状及工艺评价结果最佳。

The texture of most paddy soil in South-Anhui is clayey,which is unfavorable for tobacco growth,thus,rice-husk was added into the cultivated-horizon of paddy soil to explore its effects on soil texture and tobacco production.The results showed that： 1） with the increase of added amount of rick-husk,the contents of 0.02-2mm soil particles and soil organic matter increased,soil bulk density,water content and pH decreased,but the tendency became slow down with time.2） adding rice-husk generally can promote tobacco yield,quality and economic income,and adding 20%-30%（Vrick-husk/Vsoil） was optimal for tobacco production.