Changes in Chemical Properties of Greenhouse Soils Collected from Ganghwa

Abstract

The chemical properties of greenhouse soils in Ganghwa were investigated every year from 2014 to 2018 in order to manage soil fertility and increase crop yield. In 2018, the average concentrations of chemical properties from greenhouse soils were analyzed: 6.4 for pH, 6.72 dS m -1 for EC (electrical conductivity), 23 g kg -1 for OM (amount of organic matter), 187 mg kg -1 for P 2 O 5 (available phosphate), 1.89, 12.09, 4.84 cmol c kg -1 for exchangeable potassium (K), calcium (Ca), magnesium (Mg), respectively. There were no significant changes in the contents of pH and OM from 2014 to 2018. However, the concentration of EC was 3.7 times higher than that of the proper standard recommended by Rural Development Administration in 2018. Further, the excessive frequency ratio about exchangeable cations were 60.6% for K, 93.9% for Ca and 95.9% for Mg based on the recommendation and the contents of exchangeable cations had a tendency to increase according to the years. The frequency ratio of P 2 O 5 which is insufficient in comparison with the standard was 83.8% and the concentration of P 2 O 5 was 1.9 times lower than that of the recommendation in 2018. The P 2 O 5 content had tended to decrease with years. The OM values of cucumber and tomato were higher than those of pepper and water melon, whereas the contents of P 2 O 5 were also insufficient in all crops. Based on principal component analysis, EC was significantly correlated with exchangeable cations, K, Ca and Mg from greenhouse soils in Ganghwa. In order to promote soil fertility of greenhouse in Ganghwa, it is necessary to apply phosphate fertilizer and manage soil nutrients based on the soil tests and analyses.

Changes in Soil Chemical Properties of Rice Paddy, Upland Field, and Greenhouse in Incheon from 2015 to 2019

“…특히 시설재배지 토양은 염류가 과다하게 집적되어 있으며, 재배년수가 늘어남에 따라 토양의 염류 집적량도 계속 늘어나 는 추세에 있다고 보고되었다 (Ha et al, 1997). (Heo, 2019). 주성분 분석 연도별 논, 밭, 시설재배지 토양의 화학성분 간 주성분 분석을 수행하였다 (Fig.…”