【摘要】 本文报道了在辽阳地区土壤条件下,用化学药剂防治松苗立枯病(Rhizoctonia solaniKühn,Fusarium sp.)效果不明显、而施入森林腐殖土防治该病取得了极显著效果。方法是将森林腐殖土按每平方米苗床10千克用量与苗床10公分表上掺拌均匀。防病原因是:1.腐殖土中含有大量菌根菌,该菌与苗根形成菌根,有利于水分及无机盐类的吸收、利用。菌根菌又有抑制立枯病菌的作用;2.增加了土壤中有机质及N、P、K的含量,苗木生长健壮,提高了抗病能力。更多还原

【Abstract】 Chemicals appear not effective for control of larch seedling damping-off (Rhizoctonia solaniKühn and Fusarium sp.) in the Liaoyang District conditions,while forest humus givessignificant results in controlling the disease. The method involves an optimum humus dosage of 10Kg/m~2 and evenly mixing it with thesurface soil of 10 cm depth. The reasons of the effectiveness are:1.The forest humus has a large amount of mycorrhizaefungi which benefit water and nutrients absorption of the plant and play a antagonism role to thedamping’—off pathogen.2.Increase the organic matter and N,P,K contents in the soil,promote vigourous growth of seedlings and therefore increase their resistant ability todisesses.更多还原