酵素活性の特定の土壌特性と光の条件と植物の種類に応じたばらつき

Certain soil characteristics and light conditions of enzyme activities and variance conditional to plant type.

• Inci Sevinc Kravkaz Kuscu

抄録

土壌は、植物栽培において最も重要な要素の一つであり、その含有量が植物の生育に大きく影響する。しかし、土壌の組成や特性は、土壌が存在する地域の環境条件によって異なる。本研究では、異なる日陰条件で栽培された植物土壌中のウレアーゼおよびカタラーゼ酵素活性を調べた。Prunus cerasifera種、Tilia tomentosa種、Gleditsia triacanthos種、Euonymus japonica種、及びBetula pendula種を１回の植生期間中に５種類の異なる光条件で生育させ、その範囲内でウレアーゼ及びカタラーゼ酵素活性とPh、EC（mS.cm ̄）、CaCO（％）、OM（％）、P（ppm）、及びK（ppm）の変化を調べた。その結果、対象としたＰｈ以外の特性は、植物種や光条件によって大きく変化することがわかったが、異なる植物種を栽培している地域では、光によって土壌特性が異なるレベルで変化していることがわかった。調査の結果、多くの特性で最も高い値が得られたのは45％と65％の光条件であった。

Soil is one of the most important factors in plant cultivation, and its content affects plant growth significantly. However, soil composition and characteristics vary depending on the environmental conditions in the area where the soil is located. In this study, urease and catalase enzyme activities in plant soils grown under different shade conditions were examined. The Prunus cerasifera, Tilia tomentosa, Gleditsia triacanthos, Euonymus japonica, and Betula pendula species were grown in five different light conditions during one vegetation period, and the urease and catalase enzyme activities and Ph, EC (mS.cm ̄), CaCO (%), OM (%), P (ppm), and K (ppm) changes were examined within the scope of the study. As a result, it was found that characteristics other than Ph, which was the subject of the study, changed to a great extent depending on the plant species and light conditions; however, in the areas where different plant species were grown, the soil characters changed at different levels depending on the light. As a result of the study, the highest values in many characteristics were obtained under 45% and 65% light conditions.