土壤改良剂对烟草成熟期根茎病害发生和农艺性状的影响

Effects of Soil Amendments on the Occurrence of Root and Stem Diseases of Tobacco at Maturity and on Its Agronomic Traits

在常规施肥条件下,分别以牡蛎粉、蚯蚓粪、碳基肥、缓控肥为土壤改良剂,以不施用土壤改良剂为对照,在重庆黔江区开展小区试验,研究土壤改良剂对烤烟品种云烟87成熟期烟草青枯病、黑胫病、空茎病和花叶病4种病害的防控作用及其烟草农艺性状的影响.结果表明:土壤施用碳基肥对青枯病的相对防效最高,为54.92%,施用牡蛎粉对黑胫病和花叶病的相对防效最高,分别为62.01%和51.28%,施用缓控肥对空茎病的相对防效最高,为74.68%.土壤改良剂处理后大多数的农艺性状与对照无显著性差异.

Using oyster meal,earthworm manure,carbon-based fertilizer and slow/controlled release fertilizer as soil amendments,and no-soil amendment as a control,a plot experiment was carried out in Qianjiang District of Chongqing to study the effects of soil amendments on tobacco bacterial wilt,black shank,empty stem and mosaic diseaseon the flue-cured tobacco variety Yunyan 87 at maturity and on its agronomic traits.The results showed that the relative control effect of carbon-based fertilizer against bacterial wilt was the highest(54.92%),and the relative control effect of oyster meal on black shank and mosaic disease was the highest,being 62.01%and 51.28%,respectively.Application of slow/controlled release fertilizer gave the highest relative control effect against empty stem disease(74.68%).These soil amendments have varying degrees of influence on various agronomic traits of tobacco,but no significant difference from the control was detected in most agronomic traits.