アスパラガス連作障害におけるアレロパシー回避のための活性炭の利用(栽培管理・作型)  [in Japanese] Activated Carbon Utilization to Reduce Allelopathy that Obstructs the Continuous Cropping of Asparagus (Asparagus officinalis L.)(Crop Production & Cropping Type)  [in Japanese]

アスパラガス生育阻害へのアレロパシー物質の関与をプラントボックス法を用いて評価した結果,アスパラガスには強いアレロパシー活性があることを明らかにした.続いて,改良プラントボックス法を開発し,アスパラガスのアレロパシー活性と吸着資材の評価をした結果,ある種の活性炭はアスパラガスのアレロパシー物質を吸着し,検定植物であるレタスの生育阻害を回避できることが明らかとなった.また,アスパラガスの圃場試験においても,改植時の活性炭の処理によって,無処理区に比べて地下部重,貯蔵根数,株養成量,GI'が改善された.

The growth-inhibitory activities of allelopathy in asparagus (Asparagus officinalis L.) was studied using the 'Plant Box Method' of bioassay. By this methods we confirmed that asparagus produced allelochemical substances. Then we developed a modified plant box method to examine the relationship between the growth-inhibitory activity and the adsorption of materials to allelochemical substances from asparagus. As a result, a type of activated carbon has the ability to absorb the allelochemical substances and prevent the growth inhibition of lettuce, an assay plant. Furthermore, in a field replanted with asparagus, treatment with activated carbon increased the fresh weights of rhizomes and storage roots, as well as the number of storage roots, the growth amount, and the growth index (GI'), when compared to those of asparagus grown on non-treated plots.