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Study on the Lowering of NaCl Content by Co-composting Food Wastes
이인복,박창규,김필주,Lee, In-Bog,Park, Chang-Kyu,Kim, Pil-Joo 한국토양비료학회 2001 한국토양비료학회지 Vol.34 No.1
음식물쓰레기중 다량 함유된 식염은 음식물쓰레기 퇴비의 농업적 이용을 저해하는 가장 큰 요인으로 알려져 있으며, 본 연구는 농업적으로 안전하게 사용할 수 있는 음식물쓰레기 퇴비제조를 위하여 식염 함량이 낮은 부재료로 희석하는 방안을 시험하였다. 시험재료로 사용된 건조음식물쓰레기, 발표음식물쓰레기, 생음식물쓰레기는 생돈분, 톱밥, 왕겨 등과 혼합하여 $1m^3$ 규모로 퇴적하여 12주간 퇴비화하였다. 퇴비화과정중 온도, 탄질율, 암모니아가스 발생량을 주기적으로 조사하였고, 최종퇴비의 부숙도, 식물독성, 화학적 특성 등을 분석하였다. 탄질율은 퇴비화과정 동안 지속적으로 감소하였으나 최종/최초 탄질율의 감소는 크지 않았다. 퇴비더미의 온도와 6주째 암모니아가스 발생량을 고려할 때 모든 음식물쓰레기는 40일 전후에 퇴비화가 종료되는 것으로 판단되었고, 최종퇴비의 부숙도, 식염함량, 식물독성의 결과로부터 음식물쓰레기 종류별로 퇴비제조에 이용 가능한 몇 가지 배합비율을 선발하였다. 그러나 음식물쓰레기중 과다 함유된 식염을 희석하기 위하여 과량의 톱밥 또는 왕겨를 첨가한 때문에 최종 퇴비의 탄질비가 높고, 비료성분인 총 N-P-K 함량이 낮아 보다 양질의 음식물쓰레기 퇴비를 제조하기 위해서는 식염함량이 낮은 질소원 개발 또는 무기질 질소비료를 적절히 혼합하는 방안이 필요할 것으로 판단되었다. High salt content in food waste limit use as the potential source of compost. Since sodium chloride content should be lower than one percent to meet requirement for agricultural use of compost, we attempted use of three kinds of co-composting material for food wastes compost, which were fermented, dried, and fresh types of amendments which included pig manure, sawdust and puffed rice hull. Food wastes were composted well and stabilized after around the 40th days of composting. Little difference were found between composts amended sawdust and puffed rice hull. The result indicated that puffed rice hull could be used as a good alternative of sawdust. Because sawdust or puffed rice hull were mixed as amendments to control water contents and to dilute high NaCl content of compost material, the C/N ratios of the final products were significantly high over 40. However, NaCl contents of final products were dropped to less than percent on the fresh weight basis by mixing food wastes and the above amendments with the optimum rates.
제지슬러지에 대한 alum 처리 및 퇴비화에 따른 인 흡착능 변화
이인복 ( In Bog Lee ),장기운 ( Ki Woon Chang ),박진면 ( Jin Myeon Park ) 한국환경농학회 2007 한국환경농학회지 Vol.26 No.2
Excess application of paper mill sludge (PMS) in field can limit phosphorus uptake by crops because aluminum presented in the sludge can fix or adsorb available phosphorus which is necessary for crop growth. To investigate phosphorus (P) adsorption characteristics of PMS, we examined P adsorption maximum (Xm) using Langmuir isotherm and P adsorption energy constant (Kf) using Freundlich isotherm for PMS without alum, PMS with alum, and composted PMS with alum through a laboratory incubation test. The maximum P adsorption capacities were 800 ug g-1 in soil, 47 mg g-1 in PMS without alum and 61 mg g-1 in PMS with alum. P adsorption capacity with alum treatment for PMS increased by 30% That of PMS compost was 68 mg g-1 and showed that composting increases 11% of P adsorption. Freundlich constant Kf was 22 in check soil, while Kf values in PMS without alum and in PMS with alum were 398 and 426, respectively. After composting, Kf value of PMS compost significantly increased as 1,819. In conclusions, P adsorption capacity for PMS were increased by alum treatment or composting and therefore excess or continuous land application of alum-amended or composted PMS can limit P uptake for crops by reducing available P in soil.
질소 관비량 절감이 토마토 생육 및 수량에 미치는 효과
이인복 ( In Bog Lee ),임재현 ( Jae Hyun Lim ),박진면 ( Jin Myeon Park ) 한국환경농학회 2007 한국환경농학회지 Vol.26 No.4
To investigate the effect of N fertigation on the growth, yield, and water and nitrogen use efficiencies during tomato cultivation, seedlings were transplanted in a sandy loam soil under plastic film house condition. 0, 88, 132, 176, 220 kg ha-1 N rates, which correspond to 0 (NF0), 40 (NF40), 60 (NF60), 80 (NF80), 100% (NF100) N level of soil test-based N fertilization, were injected weekly through drip irrigation system for 15 weeks in N fertigation system, and the control (conventional N treatment) was installed for comparison. Herein, nitrogen was applied by top-dressing with 60% as a basal and 40% as additional fertilizer. There was little different in stem diameter growth among N fertigation treatments, but plant height and dry matter increased with increasing N fertigation rates as well as in N conventional treatment. Tomato yield was increased with increasing the number of marketable fruits in N fertigation treatments, and the fruit yield was maximized in NF 80 treatment (176 kg ha-1 N supply or 96.6 mg L-1 N injection). Dry matter productivity and nitrogen uptake amount were significantly increased with increasing N fertigation rates. The ratio of fruits to the dry weight of whole plant was decreased with increasing N fertigation rates, but this ratio was 2.6~5.3% higher in N fertigation treatments than in the control. In addition, the ratios of nitrogen distributed toward fruits in N fertigation treatments were 3.7~21.7% higher than that of control. The apparent N recovery percentages showed significantly higher values as 71.8~102.3% in N fertigation treatments, compared to 45% in N conventional treatment. Water use efficiency was significantly increased by fertigation system with the maximum 361 kg/ha cm-1 in NF 80, which is comparable to 324 kg/ha cm-1 of the conventional treatment. Conclusively, N fertigation system was effective on increasing tomato productivity and nutrient efficiency as well as 20% reduction of N fertilization level.
무기질 및 유기질 비료 시용이 고추 수량과 토양화학성에 미치는 영향
박진면(Jin Myeon Park),이인복(In Bog Lee),강윤임(Yun Im Kang),황기성(Ki Sung Hwang) 한국원예학회 2009 원예과학기술지 Vol.27 No.1
This study was conducted to investigate the effects of mineral and organic fertilizer application on pepper (Capsicum annuum) yield and soil chemical properties for 14 years from 1994 to 2007. For the experiment, experimental plots were established on a sandy loam soil with six treatments, which consisted of no fertilization (N?P?K?), N+P+K standard fertilization (NPK), N+P+K+compost (NPKC), P+K+compost (PKC), N+P+compost (NPC), and N+K+compost (NKC). During the 14-yr experimental period, organic matter contents in soil increased continuously at the rate of 1.11-1.17 g·㎏<SUP>-1</SUP>·yr<SUP>-1</SUP> in the treatments with compost applications and 0.51-0.55 g·㎏<SUP>-1</SUP>·yr<SUP>-1</SUP> in treatment with no compost application. The soil available phosphate in N0P0K0 treatment increased at the rate of 3.6 ㎎·㎏<SUP>-1</SUP>·yr<SUP>-1</SUP>, which was insignificant compared to those in compost applied treatments such as 16.1 ㎎·㎏<SUP>-1</SUP>·yr<SUP>-1</SUP> in NKC and 45.0 ㎎·㎏<SUP>-1</SUP>·yr<SUP>-1</SUP> in NPKC. As cultivation periods for pepper was extended, exchangeable potassium concentrations in soil tended to decline continuously. But, exchangeable potassium content in soil showed no further decline at the level of 0.22 c㏖·㎏<SUP>-1</SUP> in N?P?K? and 0.50-0.71 c㏖·㎏<SUP>-1</SUP> in NPK treatment. Fruit yield and the amount of nutrient absorbed by pepper increased in the following order: N?P?K? < PKC < NKC < NPK ≒ NPC < NPKC, indicating that hot pepper shows the greatest response to nitrogen. From the results of long-term mineral and organic fertilizer application, it is obvious that nitrogen is the important nutrient for production of pepper fruit. The amount of phosphate fertilization recommended currently for pepper should be reduced to avoid accumulation of phosphate in soil.
관개수 염 농도에 따른 간척지 재배 배추의 생장, 양분 흡수 및 글루코시놀레이트 함량 변화
이인복(In-Bog Lee),정대호(Dae Ho Jung),이평호(Pyoung Ho Yi),이준구(Jun Gu Lee),시바람반다리(Shiva Ram Bhandari) 한국원예학회 2021 원예과학기술지 Vol.39 No.5
Reclaimed land contains a large amount of soluble salts and exchangeable sodium in the soil, so it is necessary to select and cultivate tolerant crops that are resistant against salt stress. Chinese cabbage, a staple ingredient in kimchi, is an important vegetable that accounts for most of the production area of leafy vegetables in Korea, but no cases have been reported of growing cabbages in reclaimed land to examine growth and glucosinolate content. The objective of this study was to analyze the growth, nutrient absorption characteristics, and glucosinolate content of Chinese cabbages grown in spring and autumn on reclaimed land with irrigation water with different salt concentrations. The salt concentrations of the irrigation water were 0, 2, and 4 dS·m<SUP>-1</SUP>. Growth of spring and autumn Chinese cabbages did not change according to the salt concentration of the irrigation water, and only autumn Chinese cabbages showed an increase of Na content according to the salt concentration of the irrigation water. The total glucosinolate content tended to decrease when the salt concentration of irrigation water increased. The increase in salt concentration of irrigation water may reduce the bitterness of autumn Chinese cabbage. Here, it was confirmed that Chinese cabbage cultivation is possible even if the salt concentration of irrigation water reaches 4dS·m<SUP>-1</SUP> on reclaimed land, and the glucosinolate content of autumn Chinese cabbage decreases when salt concentration increases.