처리토에 녹비 식물 청보리 경작 시 휴믹 물질이 식물생장 및생물학적 토양 인자에 주는 긍정적 영향

Abstract

A study was performed to investigate the positive impacts of humic substances (HS) on the growth of green barley, a typeof green manure plant. The study was conducted in a pot culture using two different types of reclaimed soils that had beentreated by land farming (DDC) and thermal desorption (YJ) methods, respectively. The experimental conditions consistedof three treatments: plant only (P), plant plus 2% HS, and no plant (control). After 89 days of culture in a controlledgrowth chamber, the growth of spring barley and activity of seven soil enzymes were measured. The results indicated thatthe addition of HS had a substantial (p<0.10) positive effect on shoot biomass in both types of soil. Furthermore, theaddition of HS notably (p<0.05) enhanced all seven soil enzyme activities in both soils. Both the aboveground andbelowground parts of barley plants were returned to soil and aged for 10 weeks in the same growth chamber, whichresulted in notable enhancement in soil health indicators. These improvements included an increase in organic matter, adrop in bulk density, and an increase in the activity of seven different soil enzymes. When lentil seeds were planted in theaged soils, the development of the seedlings was more vigorous than that in the control in both soils, although allelopathyof barley suppressed lentil germination in soil with pH 7.0 but not in soil with pH 8.5.