• 한국유기농업학회지
• /
• 제12권3호
• /
• pp.249-264
• /
• 2004

High yield arable and crop farming demands a temporally and quantitatively determined application of plant nutrients according to field and culture. The nutrients may come from commercial fertilizers or from animal wastes. Regarding the dangers to soil, water and air, which come from current agricultural application measures for nitrogen, a sectoral approach for a nonpolluting liquid manure utilization can-not be used ally longer. An integrated system approach has to be found, leading to a drastic improvement of nutrient utilization and hence to a considerably reduced nutrient use. This can be only expected, if the organic manure can be applicated at times, when losses through leaching and volatilization can be minimized.

• 아시안잔디학회지
• /
• 제7권1호
• /
• pp.13-18
• /
• 1993

Much attention has been given recently to solve the environmental contamination in golf courses Changing to culture practice rather than chemical practice that depends on pesticides and fertilizers is a hot issue in golf courses or grasslands. Organic soil conditioners improve soil-plant envirormental conditions rich in physical properties. In this study, measuring systems to evaluate soil conditioning effects were set up for on-site purpose. After establishing the methodology for evaluating soil conditioner effects, 2 kinds of organic conditioners were rested for examination. The systems for the methodology included a set of simulating equipment for field capacity, an impact type soil column compactor, and an infiltration-percolation system. Test results using the systems showed bulk density and infiltration rate of mixed soil were decreased at highter rates of conditioner, but total porocities were increased. Increased porocities were most capillary pore space which has a positive effect on soil water potential. The systems and methodology in this study seem to have an efficiency to measure the effects of soil conditioner on site purpose.

• 한국환경농학회지
• /
• 제41권4호
• /
• pp.236-244
• /
• 2022

BACKGROUND: Liquid fertilizers can provide nutrients to crops effectively and quickly. Amino acid liquid fertilizers produced by decomposing the residues of rendered livestock carcasses are expected to be effective in improving the productivity and quality of crops. METHODS AND RESULTS: The treatment conditions for maize cultivation were control (Cn), inorganic fertilizer (IF), inorganic fertilizer and rendering residue liquid fertilizer (IF+RALF), compost (CP), compost and rendering residue liquid fertilizer (CP+RALF). Crop productivity, sugar content, and nutrient uptake were investigated after maize harvest in the field applied with liquid fertilizers. Maize yields ranged from 87.6-158 g/plant, and the yield increased by 7.9% and 12.9% in IF+RALF IF+RALF and CP+RALF than in IF and CP, respectively. The maize sugar content increased in the range of 0.1-0.5 brix % by rendering residue liquid fertilizer (RALF) fertilization, and the sugar content was the highest in CP+RALF. There was no significant change in soil chemical properties of the soil due to liquid fertilizer treatment. CONCLUSION(S): RALF increased yield and sugar content in maize cultivation, and fertilization with organic fertilizers was more effective for maize cultivation than inorganic fertilizers. Residues of rendered livestock carcass can be recycled as amino acid fertilizers, which can be effectively used for crop production and quality improvement.

• 한국약용작물학회지
• /
• 제1권1호
• /
• pp.74-80
• /
• 1993

주산지(主産地)의 약용작물(藥用作物) 재배(栽培) 및 생산(生産) 실태(實態)와 문제점(問題點)을 파악하기 위하여 전국(全國) 66개소에서 초본류(草本類) 18종(種), 목본류(木本類) 5종(種)의 약초(藥草)를 대상으로 조사한 결과는 다음과 같다. 1. 약용작물(藥用作物) 종자(種子)나 종묘(種苗)를 자가채종(自家採種) 또는 인근(隣近) 농가(農家)에서 구입(購入)하는 농가가 전체의 82%로 그 지방(地方)의 재내종(在來種)이 이용되고 있었다. 2. 1시비실태(施肥實態)는 화학비료(化學肥料)보다 유기질비료(有機質肥料) 시용(施用)이 많았으며 이중 퇴비사용농가 60.7%, 유기물(有機物)을 사용하지 않는 농가도 34.8%로 나타냈다. 한편 화학비료별로는 복합비료(復合肥料) 시용(施用)이 51.5%, 요소단용(尿素單用)이 40.9%였다. 3. 주산단지(主産團地)의 약용작물(藥用作物)중 병충해(炳蟲害)에 강한 작물은 미나리과(科)의 강활(羌活), 당귀(當歸), 방풍(防風), 시호(柴浩)와 독활(獨活), 황정(黃精), 두충(杜沖)이었고 주요해충(主要害蟲)은 응애, 진딧물, 조명나방, 굼댕이, 고자리 파리,거세미 등이고 주요병(主要病)은 흰가루병 갈반병, 잎마름병, 뿌썩음병 등이었다. 4. 작물별(作物別) 지역간(地域間) 재배(栽培), 생산(生産)과 소득(所得)은 파종기(播種期), 식재(植栽)거리, 수확년수(收穫年數), 판매방법(販賣方法)에 파라 차이(差異)가 크게 나타났으며 10a당(當) 조수익(祖收益)은 적은 농가 312천원에 비해 많은 농가는 11.3배(倍)의 소득(所得)을 보였다.

• 한국초지조사료학회지
• /
• 제23권2호
• /
• pp.77-80
• /
• 2003

본 시험은 제주지역에서 지렁이(100%) 시비량 차이(0, 100, 200, 300, 400, 500 및 600kg/10a)에 따른 신나리 열무의 생육반응 및 수량을 검토하고, 지렁이분 적정시비량을 구명하기 위하여 2002년 11월 7일부터 2003년 3월 8일까지 시험하였다. 초장은 무비구에서 500kg/10a 시비구까지 30.3cm에서 37.77cm로 커졌고, 그 이상의 시비구에서는 작아졌으나 200kg/10a에서 600kg/10a 시비구까지는 유의한 차이가 없었다. 엽수, 엽폭 및 근경은 초장 반응과 비슷한 경향이었다. 근장은 처리구간에 큰 차이가 없었고, 엽록소 함량은 시비량이 증가함에 따라 증가하였다. 총생체중(지상부중+근중)은 무비구에서 200kg/10a 시비구까지는 2,949kg/10a에서 4,561kg/10a로 유의하게 증가되었고, 300kg/10a에서 500kg/10a 시비구까지는 5,096kg/10a에서 5,707kg/10a로 증가되었다가 600kg/10a 시비구에서 4,873kg으로 감소되는 경향이었다. 그러나 300kg/10a 시비구에서 600kg/10a 시비구까지는 통계적으로 유의한 차이가 없었다. 지상부 생체중과 근중은 총생체중 반응과 비슷한 경향이었다.

• 한국토양비료학회지
• /
• 제45권6호
• /
• pp.1108-1113
• /
• 2012

1954년부터 운영해온 장기 연용 포장은 벼를 경작하는 체계에서 토양의 비옥도를 향상하기 위한 방안을 모색하고자 수행되었다. 59년 동안의 시험에서 볏짚퇴비의 시용은 토양의 유기탄소 함량을 41년 이후에 최대 $19{\sim}20g\;kg^{-1}$까지 도달하게 하였고, 볏짚퇴비를 시용하지 않은 것보다 표토에서는 1.4배, 심토에서는 2배까지 높아지게 하였다. 또한 처리구별로 토양용액중의 수용성유기탄소의 함량도 달라졌는데, 퇴비구에서 가장 높았고, 종합개량구에서는 퇴비구의 1/2 수준으로 환경으로 유출되는 수용성 유기탄소의 양이 감소하였다. 화학비료와 볏짚퇴비, 그리고 토양개량제인 규산질비료를 59년 동안 시용하였을 때, 토양의 pH, 유효인산, 치환성 양이온, 유효규산 함량 모두 증가하였다. 따라서, 무기질 비료와 유기질비료, 그리고 토양개량제인 규산질비료를 혼용하는 것은 토양의 탄소축적을 증대시키고, 환경으로 유출될 수 있는 수용성탄소의 함량을 감소시키며, 토양비옥도의 질을 향상시켜 작물을 안정적으로 생산할 수 있는 가장 적합한 방법이라 생각된다.

• 한국유기농업학회지
• /
• 제19권spc호
• /
• pp.190-193
• /
• 2011

Organic and chemical fertilizer amendments are an important agricultural practice for increasing crop yields. In order to maintain the soil sustainability, it is important to monitor the effects of fertilizer applications on the shift of soil microorganism, which control the cycling of many nutrients in the soils. Here, culture-dependent and culture-independent approaches were used to analyze the soil microorganism and community structure under six fertilization treatments, including green manure, rice straw compost, rapeseed cake, pig mature compost, NPK +pig mature compost, NPK and control. Both organic and chemical fertilizers caused a shift of the cultural microorganism CFUs after treatments. Bacterial CFUs of the organic fertilization treatments were significantly higher than that of chemical fertilization treatments. The DGGE profiles of the bacterial communities of the samples showed that the green manure treatment was a distinct difference in bacterial community, with a greater complexity of the band pattern than other treatments. Cluster analyses based on the DGGE profile showed that rice straw compost and pig mature compost had a similar banding pattern and clustered together firstly. Rapeseed cake, NPK, NPK +pig manure compost and control clustered together in other sub-cluster and clearly distinguished from green manure.

• 한국토양비료학회지
• /
• 제44권6호
• /
• pp.1107-1111
• /
• 2011

화학비료 사용량을 줄이고 화학비료를 대체할 수 있는 유기질비료 사용효과를 조사하기 위해 배추의 생육 및 질소 이용효과를 평가하였다. 처리는 배추재배의 NPK 표준시비구 ($N-P_2O_5-K_2O$ : $320-78-198kg\;ha^{-1}$)를 비롯하여, NPK 시비구의 질소시비량을 기준한 유기질 100% (OF100), 유기질70%+질소30% (OF70+N30), 유기질30%+질소70% (OF30+N70) 처리하였고, 비닐 멀칭효과를 분석하고자 동일 처리구에 각각 비멀칭과 흑색비닐멀칭재배를 실시하였다. 배추 재배기간동안 지온을 조사한 결과, 흑색비닐멀칭이 비멀칭재배에 비해 일일 평균 $2^{\circ}C$ 높았다. 토양 중 무기태질소함량은 OF100 처리구가 가장 높았으며, 배추수량도 OF100 처리구에서 흑색비닐멀칭구가 비멀칭구에 비해 46% 증가하였다. 질소이용율은 비멀칭 재배시 NPK 처리구 44%, OF100구는 26%, OF70+N30구는 21%, OF30+N70구는 27%이었고, 흑색비닐멀칭 재배시 NPK처리구는 56%, OF100구는 55%, OF70+N30구는 51%, OF30+N70은 39%의 질소이용율 각각 나타내었다. 따라서 유기질비료와 화학비료를 병용하고 흑색비닐 멀칭을 실시하면 질소 이용율을 높임으로서 비료를 절감을 할 수 있는 방법 중 하나라고 판단되었다.

• 한국토양비료학회지
• /
• 제40권4호
• /
• pp.326-329
• /
• 2007

Quantifying soil organic carbon (SOC) has long been considered to improve our understanding of soil productivity, soil carbon dynamics, and soil quality. And also SOC could contribute as a major soil management factor for prescribing fertilizers and controlling of soil erosion and runoff. Reducing tillage intensity has been recommended to sequester SOC into soil. On the other hand, determination of traditional SOC could barely identify the tillage practices effect. Physical soil fractionation has been reported to improve interpretation of soil tillage practices impact on SOC dynamics. However, most of these researches were focused onupland soils and few researches were conducted on paddy soils. Therefore, the objective of this research was to evaluate paddy soil tillage impact on SOC by physical soil fractionation. Soils were sampled in conventional-tillage (CT), partial-tillage (PT), no-tillage (NT), and shallow-tillage (ST)plots at the National Institute of Crop Science research farm. Samples were obtained at the three sampling depth with 7.5-cm increment from the surface and were sieved with 0.25- and 0.053-mm screen. Soil organic carbon was determined by wet combustion method. Significant difference of SOC contentwas found among sampling soil depth and soil particle size. SOC content tended to increase at the ST plot with increasing size of soil particle fraction. We conclude that quantifying soil organic carbon by physical soil particle fractionation could improve understanding of SOC dynamics by soil tillage practices.

• 아시안잔디학회지
• /
• 제7권1호
• /
• pp.31-34
• /
• 1993

There is a growing concern in the United Stares over the environmental and human health implications associated with heavy use of water, pesticides, and inorganic ferilizers in maintaining picture perfect golf courses. There is also a growing awareness that a beautiful course is not necessarily a healthy course. The following discussion reviews the interrelationship of turfgrass and the soil that supports it and provides basic information on currently available alternatives to turf management practices that feature intensive application of inorganic fertilizers. water and pesticides. Soil is a dynamic natural environment in which microorganisms play an important role. Soil contains a large mass of microorganisms which produce thousands of enzymes that can catalyze the transformation and degradation of many organic molecules. (In top soil under optimum conditions may contain 10 billion cells per gram of soil.). Turfgrass and the soil which supports it are interdependent. The natural organic cycle as applied to turf and soil begins with healthy vigorous grass plants storing up the sun's energy in green plant tissues as chemical energy. Animals obtain energy by eating plants and when plants and animals die, their wastes are returned to the soil and provide "food" for soil microorganisms. In the next step of the organic cycle soil microorganisms break down complex plant tissues into more basic forms and make the nutrients available to grass roots. Finally, growing plants extract the available nutrients from the soil. By free operation of this organic cycle, natural grasslands have some of the most fertile soils on earths.