Studies on Potential Supply of Soil Organic Matter Using Phragmites australis in Reclaimed Land

Abstract

This research was conducted to investigate the possibility of reeds (Phragmites australis) application to increase the low organic matter content in the reclaimed soil. Reed is not only a perennial vegetation native growing in the reclaimed land and a plant promising for soil organic resources as it is regenerated every year and also has a lot of biomass. In order to establish the system to increase the soil organic matter content, the reed residue was put into the soil using a tractor in different periods. After the growth, the reed straw was put into the soil at mid-September, mid-November and mid-February of the following year during 1 st , 2 nd and 3 rd year. Soil chemistry showed no difference in pH and EC was slightly higher at constant three years of return plot. Carbon content increased at all treatments with increasing the number of application regardless of the treatment season. The amount of soil organic content increased with increasing the number of application comparing to 4.65 g kg -1 in soil with the preserved reed. This also increased to 8.01 g kg -1 , 6.85 g kg -1 and 7.02 g kg -1 when the treatment was continued at mid-September, mid-November and mid-February for three years, respectively. This clearly showed that the application of reed straw to the soil was effective to improve soil fertility. Therefore, in order to increase the organic content of the reclaimed soil, it would be effective that the body part of reed is returned to the soil at mid-September of each year after the growth of reed is completed.

Production of Sweet Sorghum Bio-Feedstock on Technosol Using Municipal Sewage Sludge Treated with Flocculant, in Ukraine

“…Sweet sorghum is one of the promising annual energy crops that can be successfully grown on marginal lands [43][44][45][46][47]. Undemanding soil conditions, as well as high water use efficiency, are some important advantages of sorghum compared with other energy crops in arid climates [48][49][50][51].…”

Salt Removal from Soil by Winter and Spring Cultivation of Tall Fescue and Italian Ryegrass in Saemangeum Reclaimed Tidal Land

“…해안에 조성된 간척지 토양은 일반적으로 염농도와 나트륨 및 마그네슘 비율이 높고 유기물과 양분 함량이 낮음에 도 불구하고 (Ahn et al, 2016), 부족한 식량안보 확보를 위해 벼 이외의 작물을 재배하기 위한 시도가 꾸준히 이루어 지고 있다 (Lee et al, 2003(Lee et al, , 2016(Lee et al, , 2020. 유기물 공급을 위해 유기물질을 처리하거나 작물 재배 후 잔재물을 토양에 환원하기도 하고 (Yang et al, 2009;Bae et al, 2018;Kim et al, 2018), 염류 또는 나트륨성 토양 개량을 위해 다양한 물리적, 화학적 방법이 이루어지기도 한다 (Lee et al, 2015(Lee et al, , 2016. 고려해야 할 또 다른 문제로 간척지의 비산먼지 발 생이 있다.…”