배양토 및 질소 시비 (施肥) 수준이 모래밭 버섯균 ( Pisolithus tinctorius ) 을 접종한 해송 ( Pinus thunbergii ) 묘의 (苗) 생장과 균근 (菌根) 형성에 미치는 영향 = Mycorrhizal Development and Growth Stimulation of Pinus thunbergii Seedlings Inoculated with Pisolithus tinctorius at Two Soil Mixtures Treated with Six Nitrogen Levels

다국어 초록 (Multilingual Abstract)

This study was carried out for observation of growth, mycorrhizal formation and nutrient absorption of Pinus thunbergii seedlings treated with two soil mixtures and various nitrogen levels after inoculation with mycorrhizal fungus, Pisolithus tinctorius. 1. Seedlings grown on vermiculite applied with 50-150 ㎍/㎖ nitrogen levels were well developed with pinnate type and cluster-like mycorrhizae. But seedlings on sandy loam had monopodial type in addition to the above-mentioned two types. 2. Optimum fertilization Level for mycorrhizal formation is 50 or 150 ㎍/㎖ N that showed best mycorrhizal formation of 86. 4 (±3.14)% or 73.0 (±7.21)%, respectively, but increased nitrogen levels decreased formation of mycorrhizal short roots. Seedlings applied with 450㎍/㎖ nitrogen level decreased in net assimilation rate (NAR) and crop growth rate(CGR) during early growth of the seedlings, and they were increased since Aug, when nutrient application was stopped. 9. Inorganic nutrient absorption was increased more in seedlings grown on vermiculite and inoculated growth medium than those grown on sandy loam and noninoculated one, and it was gradually increased with increasing nitrogen increasing nitrogen level until 350㎍/㎖. But 450㎍/㎖ nitro gen level rather reduced absorption of nutrient.