• 한국작물학회지
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• 제39권4호
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• pp.373-381
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• 1994

호밀을 답리작으로 재배시 수량, 일반사료성분과 에너지 함량 및 수량을 질소시비량 및 예취시기에 따른 반응을 요약하면 다음과 같다. 1. 호밀은 질소시비량이 30kg/10a까지 많을수록 청예 및 건물수량이 증가하고 건물률은 감소하였으며 식물체의 엽신과 엽초의 비율은 증가하는 반면 줄기와 이삭의 비율은 감소하였다. 2. 호밀은 질소시비량이 많을수록 단백질, 총가소화양분(TDN), 무기물 및 에너지 함량과 수량이 모두 증가하였으며 ADF(acid detergent fiber) 와 NDF(neutral detergent fiber)의 함량은 감소하고 상대적사료가치가 높아졌다. 3. 질소시비량이 많아지면 예취시기가 늦더라도 전체 조단백질 함량 중에서 가급태 단백질이 차지하는 비율이 크게 낮아지지 않았다. 4. 호밀의 수확적기는 관행사료가치의 관점에서 는 대체로 유숙기 무렵으로 판단되었으나 사료의 에너지 관점에서는 이와 다소 차이가 있었다. 증체에너지(NEG)와 유지에너지(NEM) 면에서 본 수확적기는 개화후기에 높고 관행사료가치보다 10일정도 빨랐으며 에너지추정값(ENE)과 필유에너지(NEL)는 유숙기 무렵으로 같았다.

• 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 $230kg\;ha^{-1}$.

• 한국토양비료학회지
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• 제45권6호
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• pp.1009-1016
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• 2012

The purpose of this study was to determine the effects of organic fertilizers on soil properties and growth and quality of melon. Organic fertilizer was applied in soil at the rate of 0, 0.5, 1, 2N according to Rural Development Administration guideline in Korea. The fertilizer had no effects on plant growth-rate parameters, including plant height, leaf number, and leaf size. There were minor effects on the fruit quality parameters such as fruit weight, fruit length, fruit width, placenta and seed weights, sugar content, and starch content. Ascorbic acid level was decreased as fertilizer level was increased. The level of nitrate in groundwater increased with increased levels of N.

• 한국작물학회지
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• 제45권2호
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• pp.128-133
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• 2000

This study was carried out to investigate the effect of forms and levels of nitrogen fertilizer on plant growth and essential oil production of Agastache rugosa. Calcium nitrate had more influenced on length and width of leaves and lateral branch length than did urea. When nitrogen fertilizer level was increased from 12 kgN/I0a to 24kgN/I0a, plant growth was stimulated and dry matter of leaf and inflorescence were increased. Top dry matter of plant with calcium nitrate treatment (38.4 g) was heavier than that of urea treatment (32.8 g). Interactions among accession and nitrogen form and nitrogen rate were not significantly different for top dry matter. The forms and rate of nitrogen fertilizer did not affect estragole content. The estragole contents was higher in leaf (91.8%) than that of inflorescence (81.3%). While the essential oil content was not affected by different nitrogen forms, nitrogen level affected the essential oil contents positively by increasing dry matter. Essential oil yield was not affected by accession or nitrogen form, but by nitrogen rate. With increasing N application from 12kgN/I0a to 24 kgN/I0a, essential oil yield was increased by 95.8 %.

• 한국초지조사료학회지
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• 제17권2호
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• pp.167-176
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• 1997

A field experiment was conducted in Chungiu and Jungwon to evaluate growth characteristics, root development, dry matter yield, crude protein yield and palatability according to nitrogen fertilizer level at intercropping cultivation of sorghum $\times$ sudangrass hybrid(hereinafier referred as SSH) and soybean. Nitrogen level was six treatment of Okg, 30kg 60kg, 90kg 120kg, and 150kg per hectare, and cutting date (sorghum $\times$ sudangrass and soybean) was july 28. 1. In the SSH, plant length was increased with increasing nitrogen fertilizer from 0kg/ha to 120kg/ha, but 150kgha treatment was decreased cornpared to 120kg/ha treatment. In the soybean, plant length did not show difference among 0kg, 30kg 60kg, and 90kg per hectare, but 120kg and 150kgfha treatment was on the contrary short. In the SSH, leaf length, leaf width and leaf number were the highest in 120kg/ha treatment, but soybean showed multifarious. 2. Stem diameter of SSH was increased with increasing nitrogen fertilizer. But soybean was thick from 0kg/ha treatment to 60kg/ha treatment, while above 90kg/ha treatment was on the contrary thin. Stem of SSH was hard with increasing nitrogen fertilizer, but soybean was soft with increasing nitrogen fertilizer. Root weight (Dry matter) of SSH was increased with increasing nitrogen fertilizer. On the contrary, soybean was decreased with increasing nitrogen fertilizer. 3. In the dairy cattle and Korean native cattle, palatability according to nitrogen fertilizer was the highest at 90kgha treatment, while 120kgha treatment and 150kgha treatment was the lowest. But in the deer, 30kg/ha treatment of low nitrogen fertilizer was the highest in palatability. 4. Nitrogen content of root of SSH was increased with increasing nitrogen fertilizer(P<0.01). But in soybean, 30kg and 60kg/ha treatment were higher than 0kg, 90kg, 120kg and 150kg/ha treatment(P<0.01). Total niwogen content of soil were high at 90kg 120kg 150kgha trea~ment(P<0.01). 5. Dry matter yield was high at the 90kg 120kg and 150kgha treatment as range from 15, 262kg/ha to 15, 614kg/ha without significant difference among those, but Okgha treatment was the lowest as 11, 183kg/ha (PC 0.05). Protein content of SSH was the highest at 90kg/ha treatment as 8.3 percentage. Soybean was highest at 60kgha treatment as 22.9 percentage. Protein yield was the highest at 90kg/ha treatment as 1, 547.6kg/ha, but Okgha treatment was the lowest as 1, 022.8kg/ha (P<0.01).

• 한국토양비료학회지
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• 제33권3호
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• pp.160-166
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• 2000

차광재배 후 채취한 차잎으로 제다(製茶)한 옥로차의 시비량에 대한 연구결과는 다음과 같다. 시험토양은 일반토양보다 유기물($59.8g\;kg^{-1}$)과 유효인산($1,285mg\;kg^{-1}$)함량은 많았으나 pH(4.79)가 낮은 약산성토양이었다. 질소시비량이 증가함에 따라 수량은 증가하였으나, 과도한 질소비료 시용시 수량은 증가되지 않았다. 질소시비량이 증가할수록 총질소, 총아미노산, 카페인, 엽록소함량은 증가하였으나, 탄닌과 비타민 C 함량은 별 차이가 없었다. 시비량이 증가할수록 데아닌, 아르기닌 함량은 증가하였고, 반면에 아스파틱산 세린, 글루탐산은 감소하였다. 총지방산 함량은 $2.850{\sim}3.012mg\;100g^{-1}$이었고 특히 질소 $80kg\;10a^{-1}$에서 불포화 지방산인 oleic acid, linoleic acid, linolenic acid 함량이 다른 처리구에 비해 많았다. 질소 $80kg\;10a^{-1}$ 처리구기 다른 처리에 비해 관능평가에서 0.2~4.6점 더 높은 점수를 받았다. 질소 $80kg\;10a^{-1}$처리가 다른 처리에 비해 수량도 양호하고 차 품질도 우수하여 차나무의 적정시비량이라 생각된다.

• 한국식품저장유통학회지
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• 제5권2호
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• pp.123-126
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• 1998

This study was carried out investigate to optimum levels of nitrogen and phosphate fertilizer to get a higher yield and a quality of an onion(Allium Cepa L.) from 1993 to 1994. Three fertilizer levels were applied with 120, 240 and 360kg/ha of nitrogen and 100, 200 and 300kg/ha of P2O5 during the onion growing season. After harvesting the onion, it was storaged at given deposit. The growth and yield of the onion were better at the fertilizer levels of both 240 and 360kg/ha of nitrogen and of both 200 and 300kg/ha of P2O5 than at the level of 120kg/ha in nitrogen and 100kg/ha of P2O5. The content of total nitrogen and P2O5 in plant was decreased with reduced application levels of nitrogen and phosphate fertilizer. The rotting rate was higher at the levels of both 360kg/ha in nitrogen and 300kg/ha in P2O5 than the other treatment during the storage period. The sprouting rate tended to be high at 240kg/ha of nitrogen and 100kg/ha of P2O5.

• 한국초지조사료학회지
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• 제15권1호
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• pp.52-60
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• 1995

This experiment was carried out to determine the effect of nitrogen application level of cattle sluny(T1:150, T3:250, T53.50 kglha) and chemical fertilizer(T2:150, T4:250, T6:350 kg/ha) on the growth characteristics, dry matter yield and chemical soil property of Sorghum-Sudangrass hybrid [Sorghum bicolor L. Moench]. The results obtained are summarized as follows: Mean stem diameter was significantly increased by increasing nitrogen application level of cattle slurry and chemical fertilizer. Especially, T6 treatment was the highest as 11.1 mm, while T1 treatment w a the lowest as 0.3 mrn. According to the same level of nitrogen application, cattle slurry treaunent(T1, T3 and T5) were showed a lower mean stem hardness than chemical fertilizer treatment(T2, T4 and T6). Especially, T3 treatment was the softest at 0.7 kg/$cm^2$. The dead stubble and tiller number were increased by increasing nitrogen level of cattle slurry and chemical fertilizer(P

• 한국토양비료학회지
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• 제38권4호
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• pp.194-201
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• 2005

본 연구에서는 규산질 비료 시용을 통한 질소의 흡수 이용율을 증진하고 이용율 증진에 따른 질소 시비량 저감방안을 모색하였다. 경남 하동 소재의 전형적 논토양(가천통)에서 규산 처리수준에 따른 질소 이용을 증진효과를 평가하기 위해 무처리, 유효규산 $130mg\;kg^{-1}$ 조절 처리, 조절량의 2배 처리와 같은 세 수준의 규산처리를 기본처리구로 설정하였다. 각 규산 처리조건에서 0, 110, $165kg\;ha^{-1}$의 세 수준으로 질소를 처리하여 벼 재배과정 중 수량반응특성 및 양분흡수특성을 조사하였다. 동일수준의 질소 처리조건에서 정조 수량과 질소이용률은 규산질 비료 처리수준이 증가함에 따라 유의적으로 크게 증가되었다. 규산질 비료를 처리하지 않았을 때 질소 $154kg\;ha^{-1}$ 수준에서 최고 정조 수량 획득이 가능하였다. 규산질 비료를 추천량인 $130mg\;kg^{-1}$과 추천량의 배 량 처리시 벼의 생육증가에 따른 질소 흡수 이용율 증가로 약 76과 $52kg\;ha^{-1}$의 질소처리조건에서 규산 무처리 때 얻을 수 있는 최고 정조 수량의 획득이 가능한 것으로 분석되었다. 결과적으로 규산질 비료처리 없이 얻을 수 있는 최고 정조수량을 얻기 위해 필요한 질소 시비량인 $154kg\;ha^{-1}$을 규산질 비료 추천량과 추천량의 배량 처리로 인해 약 76과 $102kg\;ha^{-1}$의 질소 시비량 저감이 각각 가능할 것으로 분석되었다. 그리고 규산질 비료시용으로 토양 pH가 다소 개선되었으며, 토양 내 유효 인산 및 규산 함량이 크게 증가하여 토양의 비옥도 증진에 효과가 있는 것으로 조사되었다.

• 한국초지조사료학회지
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• 제16권2호
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• pp.113-120
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• 1996

The experiment was carried out to investigate the effects of phosphate fertilizer level on growth, crude protein content and nitrogen fixation ability of alfalfa(Medicugo sariva L.) at sowing year. The experimental field was conducted using a randomized block design with three replications according to the phosphate application level (200 and 400kfia) in farm of Kongju National University. Research samples were collected at intervals of 7 days from October 7 to December 9 and nitrogen fixation activity of nodule was measured by using the acetylene reduction method (Hardy et al. 1968). The results obtained are summarized as follows : 1. Number of branches, root length and dry matter weight at phosphate fertilizer level of 400kg in sowing year were more increase than those of 200kfia. The number of nodules was not significantly difference between phosphate fertilizer level, because of low temperature to be enough to nodulation of alfalfa. 2. The crude protein content of leaf, stem and root were not significantly affected by the phosphate fertilizer level. but that of leaf was increased at 400kgha on 72 days after sowing. The crude protein content of each part according to growing stages was increased at 44 days and 72 days after sowing. 3. The dry weight of root was not significantly difference between phosphate fertilizer level from 30 days to 51 days after sowing, but that was increased at phosphate fertilizer level of 400kgha from 51 days afier sowing. 4. The amount of ethylene in the samples taken 2 hours and calculated amount of nitrogen fixation were increased at phosphate fertilizer level of 400kfia from 30 days to 65 days after sowing. but there was vice versa from 58 days after sowing.