• 한국토양비료학회지
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• 제39권6호
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• pp.345-350
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• 2006

본 시험은 벼 종이멀칭이앙 시 적정한 완효성비료의 시용량을 구명하고자 경기도 수원에 위치한 작물과학원 벼 연구 포장 강서통에서 대안벼를 2004년 5월 28일에 중묘를 멀칭기계 이앙하였다. 시험에 사용한 완효성비료는 LCU (Latex Coated Urea, 21-7-9) 복비를 시용하였다. 피복재료는 생분해성 폴리에스터 (PES $10{\mu}m$)+재생지를 이용하여 피복하였다. 처리내용은 관행질소시비량 ($110kg\;ha^{-1}$)을 기준으로 하여 완효성비료호 기준시비량의 60%, 80%구, 100%구와 관행 및 무질소구를 두고 시험을 수행하였다. 벼 멀칭이앙 시 모의 결주율은 무피복의 관행이앙과 차이가 없었다. 잡초발생 및 방제가는 시비량이 적을수록 잡초가 다양해지고 잡초방제가가 낮아지는 경향이었다. 벼 이앙 후 일수가 진전됨에 따라서 시비량이 많을수록 초장와 경수가 크거나 많아지는 경향이었고 완효성비료 80%구의 벼 생육이 관행시비구와 차이가 없는 경향이었다. 엽색도와 토양 중 $NH_4{^+}-N$도 유사한 경향을 보였다. 따라서 수량구성요소 중 $m^2$당 이삭수의 증가로 인하여 완효성비료 80%구가 관행과 수량 차이가 없었다. 농업적 질소이용 효율은 시비량이 적을수록 증가하였다. 벼 종이멀칭이앙 시 벼 수량 및 수량구성요소, 잡초발생 및 방제가, 시비효율 등을 종합적으로 고려하여 관행질소 시비량의 80%를 완효성비료로 이앙 전에 밑거름으로 전층시비 하는 것이 알맞을 것으로 생각된다.

• 한국토양비료학회지
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• 제49권6호
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• pp.677-681
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• 2016

Excessive nitrogen fertilization influences crop yields and quality as well as environmental pollution. In this study, yields, nitrogen use efficiency and free sugar contents of burdock (Arctium lappa L.) were evaluated at different levels of nitrogen fertilization. Nitrogen fertilizer was applied at 5 levels (0, 50, 100, 150, 200%) based on the conventional fertilization ($N=230kg\;ha^{-1}$), and phosphate and potassium fertilizer were treated by conventional P and K fertilization ($P_2O_5-K_2O=140-210kg\;ha^{-1}$) in all plots. The root yields of burdock were the highest in N 100~150% treatment plots. Nitrogen use efficiency and nitrogen recovery decreased from over N 150% treatment. Nitrogen uptake of root was greater than that of shoot in N 50~200% treatments. Fructose contents in root were inversely proportional to the level of nitrogen fertilization. As considering nitrogen recovery and root quality, economical burdock yield was obtained in N $230kg\;ha^{-1}$.

• 한국약용작물학회지
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• 제22권2호
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• pp.127-133
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• 2014

This experiment was carried out to investigate the effect of several organic compost on the growth and root yield of Angelica gigas Nakai with organic cultivation. After fertilizing the soil with organic fertilizer, the dry weight of liming fertilizer showed a slow change, while microorganism fertilizer decreased about 29% until 20 day after fertilizing. At 110 days after fertilizing, microorganism fertilizer decreased more than liming fertilizer. Liming fertilizer decomposed slowly, while microorganism fertilizer decomposed early on rapidly but gently after 20 days in decomposed rate of organic fertilizer. Dried root yields per 10a of A. gigas were not significance between 277.6kg in conventional fertilizer and 277.7kg, 280.5kg in N 1.5, N 2.0 times of microorganism fertilizer. Decursin and decursinol angelate contents in A. gigas were 9.08 ~ 9.07% from N 1.0 and N 1.5 times in liming fertilizer, and 7.94 ~ 8.12% from N 1.5 times and N 2.0 times in microorganism fertilizer, compared to 7.31% of conventional treatment.

• 한국작물학회지
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• 제60권3호
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• pp.333-337
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• 2015

이 실험은 녹비작물로 주로 이용되는 헤어리베치를 재배한 후 찰옥수수의 옥수수의 생육과 수량 특성을 알고자 실시하였다. 찰옥수수의 생육 특성은 관행재배에 비하여 헤어리베치를 녹비로 환원하고 질소시비량을 증가할수록 생육효과를 보였으며, LAI는 18 kg미만일 때 관행지배와 비슷하였다. 이삭 길이는 관행재배의 188 mm와 비교하여 헤어리베치를 녹비로 이용하고 질소시비량이 9 kg이하일 때 다소 감소하였으나 질소시비량이 18 kg 이상일 때 관행재배보다 길었다. 100립중은 헤어리베치와 27 kg의 질소시비량 처리가 35.4 g으로 가장 높았으며 헤어리베치와 0 kg의 질소시비량 처리가 27.4 g으로 가장 적었다. 수량은 헤어리베치와 9 kg의 질소시비량이 관행재배의 수량과 비슷하였으며, 당도는 관행재배에 비하여 헤어리베치와 18 kg 이상의 질소시비 처리에서 더 높았고, 과피 두께는 처리간에 차이를 볼 수 없었다.

• 한국잠사곤충학회지
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• 제35권1호
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• pp.17-20
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• 1993

강원도 지방에서의 철늦은 뽕밭 덧거름이 뽕잎 수량과 봄철 가지끝마름에 미치는 영향을 구명하기 위하여 관행시비시기인 6월 20일을 대조로 8월 10일과 30일에 덧거름을 주고 수량과 가지끝마름비율을 조사한 결과 다음과 같았다. 1. 뽕잎수량은 8월 10일 시비구는 가장 높아 관행대비 10~30%, 잎뽕수확구에서는 10~17%의 증수를 보였으나, 통계적인 유의차는 인정되지 않았으며, 8월 30일구에서는 관행구와 큰 차를 보이지 않았다. 2. 봄철 가지끝마름비율을 비교하면, 관행구가 가장 높아 중간벌채구에서는 13.1%를 보인 반면 다른 구에서는 이보다 낮은 7.7~12.8%를, 잎뽕 수확구에서는 18.3%를 보인 반면 다른 구에서는 이보다 적은 11.0~13.3%를 보여서 덧거름에 의한 가지끝마름비율의 증가는 인정되지 않았다.

• 한국작물학회지
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• 제62권4호
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• pp.346-351
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• 2017

본 연구는 무경운 재배법을 확립하고자 비료종류와 시비 방법에 따라 콩의 생육 및 수량을 조사하였으며, 주요 결과는 다음과 같다. 1. 경운과 무경운 처리구에서 풋거름, 돈분액비, 화학비료의 비료종류에 따라 콩의 생육이 각각 달랐다. 경운과 무경운 모두 화학비료처리구에서 콩의 생육이 높았으며, 경운유무에 따라서는 경운에서의 생육이 가장 높았다. 2. 엽색도 조사에서는 비슷한 양상으로 증가하였는데 엽색도 함량이 최고에 달했을 때를 비교해보면 무경운-화학비료처리구에서 가장 높았으며, 상대적으로 경운-풋거름처리구에서 엽색도가 낮은 수치를 나타냈다. 3. 콩 종실 1 g 및 0.5 g의 질소, 인, 칼륨의 성분량을 분석했을 때 인과 칼륨의 경우 경운과 무경운 모두 큰 차이를 두지 않고 비슷한 함량을 나타내었으며, 질소는 이와 다르게 돈액비료처리구에서 질소의 함량이 가장 높게 나왔다. 4. 콩 종실의 수량조사에서는 생육조사와는 다르게 무경운-돈분액비에서 수량이 가장 높았고, 상대적으로 무경운-관행처리구에서 수량이 가장 낮았다. 무처리구를 제외하고 풋거름처리구의 경우 경운, 무경운 모두 생육양상이 저조함에 따라 콩의 수량도 낮았다.

• Journal of Animal Science and Technology
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• 제47권3호
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• pp.481-490
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• 2005

Nitrate contamination in water system is a critical environmental problem caused by excessive application of chemical fertilizer and concentration of livestock. In order to prevent further contamination, therefore, it is necessary to understand the origin of nitrate in nitrogen loading sources and manage the very source of contamination. The objective of this study was to examine the nitrate contamination sources in different agricultural system by using nitrogen isotope ratios. Groundwater and runoff water samples were collected on a monthly basis from February 2003 to November 2003 and analyzed for nitrogen isotopes. The nitrate concentrations of groundwater in livestock fanning area were higher than those in conventional and organic fanning area and exceeded the national drinking water standard of 10mg N/ l. The ${\delta}^{15}N$ranges of chemical fertilizer and animal manure were - 3.7${\sim}$+2.3$\textperthousand$ and +12.5${\sim}$26.7$\textperthousand$, respectively. The higher ${\delta}^{15}N$ of animal manure than those of chemical fertilizer reflected isotope fractionation and volatilization of '''N. The different agricultural systems and corresponding average nitrate concentrations and ${\delta}^{15}N$ values were: conventional farming, 5.47mg/e, 8.3$\textperthousand$; organic fanning, 5.88mg/e, 10.1$\textperthousand$; crop-livestock farming, 12.5mg/e, 17.7%0. These data indicated that whether conventional or organic agriculture effected groundwater and runoff water quality. In conclusions, relationship between nitrate concentrations and ${\delta}^{15}N$ value could be used to make a distinction between nitrate derived from chemical fertilizer and from animal manure. Additional investigation is required to monitor long-term impact on water quality in accordance with agricultural systems.

• 한국식품저장유통학회지
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• 제5권2호
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• pp.127-132
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• 1998

In order to fad out an efficient way of topdressing nitrogen fertilizer in mulch-cropping system of onion(Allium cepa L.), solid, slow-release, and liquid forms of nitrogen fertilizers were allied to cv. 'Changnyungdaego' various number of times at different time, with 5 topdress applications of solid fertilizer serving as a control. Whole basal application of conventional solid fertilizer and 2 slow-release fertilizers were labor-saving and showed improved storage quality of bulbs, but resulted in poor plant growth and considerably low yield due to fertilizer shortage from early April. This suggests that topdress application is necessary. Liquid form of nitrogen fertilizer was more effective for plant growth and yield and saving labor than the solid form. Early applications was effective for increasing yield and storage quality of onion bulbs harvested. Thus two applications of liquid form of nitrogen fertilizer in February and March at rome month interval are recommended in mulch crowing system of onion.

• 한국토양비료학회지
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• 제44권4호
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• pp.565-574
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• 2011

The development of satisfactory alternatives for supplying the nutrients needed by crops could decrease the problems associated with conventional NPK chemical fertilizers. In this study, the effects of bacterial and fungal effective microorganisms (EM) on the growth of Chinese cabbage (Brassica rapa) were evaluated. This investigation was carried out parrallel with conventional NPK chemical fertilizer and a commercial sold microbial fertilizer to compare between each of their effect. Sterile water and molasses were served as controls. Azotobacter chroococcum effect also was studied either alone or in combination with the effective microorganisms on the growth parameters. In contrast to the bacterial EM, the fungal EM alone without A. chroococcum had a more stimulating effect than fungal EM combined with A. chroococcum. Results showed that seedling inoculation significantly enhanced B. rapa growth. Shoot dry and fresh weight, and leaf length and width significantly were increased by both bacterial and fungal inoculation. The results indicated that the NPK chemical fertilizer deteriorates the microflora inhabiting the soil, while the effective microorganisms either fungal or bacterial ones increased the microbial density significantly. This study implies that both of fungal and bacterial EM are effective for the improvement of the Chinese cabbage growth and enhance the microorganisms in soil. The results showed antagonism occurred between A. chroococcum and each of Penicillium sp and Trichoderma sp in both agar and plant assays. The data were statistically analyzed by ANOVA and Dunnett test.

• 한국초지조사료학회지
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• 제8권2호
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• pp.99-103
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• 1988

With a purpose of finding out the effects of magnesium and boron enriched organic-compound fertilizer application on qualities of grasses on the hilly pasture, a field experiment was arranged with five different treatments as a randomized block design and lasted from September, 1984 to the end of growing season in 1986. The results obtained are summarized as follows: 1. Mean chemical components except NFE of grasses at the plots with organic-compound fertilizer application were appeared to contain slightly high comparing to single dressing. 2. Production of DCP with organic-compound fertilizer (1,170.2 kg/ha) was significanty increased by 20% comparing to single dressing (975.7 kg/ha) in the conventional fertilization level (p<0.05), but it was not significantly different between them in the low dressing level. 3. Production of energies (TDN, StE and NEL) with organic-compound fertilizer of low and conventional dressing level were appeared to increase by 10 and 13 to 15% than those of single dressing of the same levels, respectively. But it was not significant difference. 4. Like single dressing nutrient productions with organic-compound fertilizer were appeared significantly high due to increasing of dressing gradually (P<0.05-0.01) 5. Mineral contents of P and Mg at the plots with organic-compound fertilizer were a little higher, on the other hand, K, C/P and K/Ca + Mg equivalent ratio were slightly lower than those of single dressing, but the content of Ca tended to similar between them.