• 농업과학연구
• /
• 제50권2호
• /
• pp.181-192
• /
• 2023

Appropriate fertilization methods are required according to species to supply necessary nutrients to plants and prevent soil environmental contamination in nurseries. In this study, the effects of nitrogen and phosphorus fertilization on the growth of Liriodendron tulipifera and soil characteristics were investigated. After 16 fertilization treatments (4 levels of nitrogen × 4 levels of phosphorus) were applied to one-year-old L. tulipifera seedlings at the Yongmun Nursery Station of the Korea Forest Service, height, root collar diameter (RCD), biomass, leaf nutrients, and soil characteristics were investigated. The height increased as the amount of nitrogen and phosphorus fertilization increased, and the RCD was the highest in the ×2 treatment. Biomass growth was on average 40.0% higher for the treatment with high nitrogen fertilization compared to the low nitrogen treatment. The seedling quality index was the highest with nitrogen and phosphorus ×2 treatment. Leaf phosphorus and magnesium concentrations decreased when nitrogen fertilization was applied, and leaf potassium concentrations decreased as nitrogen fertilization increased. Soil pH and exchangeable potassium decreased as the amount of phosphorus application increased, and exchangeable magnesium decreased as the amount of nitrogen application increased and increased as the amount of phosphorus application increased. Considering the growth of L. tulipifera seedlings and changes in the soil characteristics at the nursery stage, twice the standard fertilization amount is the appropriate fertilization amount for nursery of the Yongmun Nursery Station. It is expected that this study will contribute to improving nursery soil fertilization management technology for healthy seedling production.

• 한국농공학회:학술대회논문집
• /
• 한국농공학회 2001년도 학술발표회 발표논문집
• /
• pp.451-455
• /
• 2001

This study was performed to examine water and nutrient balance during rice cropping period using difference fertilization paddy plot in ground water irrigation region. The experimental rice paddy consist of three plot, Treatment of Excess fertilization(TEF) and Treatment of Standard Fertilization(TSF) and Treatment of Reduce Fertilization(TRF). As result, input amount to rice paddy was almost rainfall and output was direct runoff through drainage. nutrient input amount was upper paddy in case COD and fertilization in case Total nitrogen and total phosphorus, and output was drainage in all nutrient.

• 대한한방부인과학회지
• /
• 제30권4호
• /
• pp.203-212
• /
• 2017

Objectives: To report the efficacy of traditional Korean medicine to an infertile patient who repeatedly failed in vitro fertilization. Methods: The patient was diagnosed with adenomyosis and failed in vitro fertilization 9 times. Her dysmenorrhea and physical symptoms were improved through traditional Korean medicine and she was pregnant with the 10th attempt of in vitro fertilization. She had bleeding during pregnancy due to adenomyosis and took herbal medicines to maintain stable condition. Results: During the treatment period, the uterine thickness due to adenomyosis was reduced and her dysmenorrhea was improved. She was pregnant by in vitro fertilization and gave birth to a healthy child by Caesarean section. Conclusions: This case report shows that traditional Korean medical treatments work to improve the success rate of in vitro fertilization.

• 한국작물학회:학술대회논문집
• /
• 한국작물학회 2022년도 추계학술대회
• /
• pp.106-106
• /
• 2022

An appropriate amount of nitrogen fertilizer input during rice cultivation is essential for rice growth, quality control, and reduction of greenhouse gases in paddy fields. Therefore, it is necessary to develop a technology that can check whether an appropriate amount of fertilizer is applied in paddy fields. In this study, we tried to derive a method for diagnosing nitrogen fertilization level using spectroscopic diagnosis, physiological analysis, and molecular indicator genes. Nitrogen fertilization treatment was performed in a greenhouse by dividing into five treatment conditions: no fertilization (N0), low fertilization (N0.5), standard fertilization (N1.0), excessive fertilization (N1.5), and double fertilization (N2.0), respectively. Growth characteristics analysis was investigated by nitrogen fertilization conditions and growth stages, and the height of the canopy was analyzed using a laser scanner. Physiological and spectroscopic analyses were performed by analyzing chlorophyll and sugar contents and measuring SPAD and leaf spectrometer on rice leaves. In addition, real-time PCR experiment was performed to check the relative expression levels of several known nitrogen metabolism related genes. These results suggest that spectroscopic techniques can be helpful in diagnosing the level of nitrogen fertilization in rice paddy fields.

• 한국발생생물학회지:발생과생식
• /
• 제20권2호
• /
• pp.127-133
• /
• 2016

Purine metabolism is known factor for nuclear maturation of oocytes through both follicle cells and oocyte itself. However, it is largely unknown the roles of purine metabolism in the oocyte competence for fertilization and early development. In this study, the effects of adenosine in oocyte competence for development were examined using adenosine and its synthetic inhibitors. Adenosine treatment from GV intact stage for 18 hr (fGV) caused of decrease the fertilization rate but of increase the cleavage rate compared from the other stage treatment groups. Hadacidin did not effect on fertilization rate but increased cleavage rate without stage specificity. Adenosine did not block the effects of hadacidin with the exception of fGV group. Inhibition of purine synthetic pathways the fertilization rate was decreased in the fGV and fGVB groups but increased in the fMII group. Exogenous adenosine caused of decrease fertilization rate in the fGVB group but increase in the fMII group. Cleavage rate was dramatically increased in the adenosine treatment with synthetic inhibitors. It means that the metabolism of purine has stage specific effects on fertilization and cleavage. Exogenous adenosine had only can improve oocyte developmental competence when it treated at GV intact stage. On the other hand, endogenous synthesis in all maturation stage cause of increase the cleavage rate without effects on fertilization. These data suggest that adenosine at GV stage as a paracrine fashion and inhibitions of endogenous adenosine in all stage improve oocyte developmental competence.

• Clinical and Experimental Reproductive Medicine
• /
• 제26권3호
• /
• pp.369-375
• /
• 1999

Objective: To evaluate the effect of serum obtained before and after treatment for endometriosis on in vitro fertilization and development of two cell mouse embryo. Design: Pretreatment and posttreatment comparoson of fertilization of mouse oocyte and embryo development in serum supplement from patients with endometriosis; result were compared using Stuent T-test analysis. Method: Infertility Clinic, Department of Obstetrics and Gynecology, Collage of Medicine, Won kwang university, Korea. Patients was chosed eleven consecutive women with endometriosis. Interventions was all patient underwent laparoscopic or conservative surgery. This was followed by a 6-month course of burserelin acetate $900{\mu}g/d$. Main outcome was measured total number of fertilization and embryo that was fertilization after 24 hours and reached blastocyst stage after 72 hours of incubation were compared before and after treatment. Result: Before treatment, 47% of the oocyte were fertilized and 31% of the embryo reached blastocyst stage. After treatment, Significantly more fertilized and Significantly more embryo developed to blastocyst on the stage I and II of endometriosis. Conclusion: The fertilization and embryo toxicity of serum samples from patients with endometriosis is lost after treatment.

• 자연과학논문집
• /
• 제11권1호
• /
• pp.113-117
• /
• 1999

사과 스타크림손품종에 질소시용량을 달리하였을 때 질소 다량 시용구가 표준 시용구보다 과실의 칼슘함량이 적었다. 칼슘용액의 수관살포로 과실 칼슘함량이 증가되었고 반점성 생리장해발생이 감소되었는데 특히 질소표준구에서 칼슘함량 증가가 뚜렷하였다. 사양토에 재식된 후지품종에 대한 관수는 과실의 비대와 잎과 과실의 칼슘함량을 증가시키는 효과가 있었다.

• 한국작물학회지
• /
• 제51권5호
• /
• pp.408-419
• /
• 2006

유기물 함량이 높은 토양에서는 질소 감비조건에서 관행 시비구와 유사한 수량을 확보할 수 있었던 원인은 토양중의 유기물의 무기화에 의한 암모늄태 질소의 효과적인 방출과 수량구성요소에서 초기에 충분한 분얼수의 확보 그리고 생육후반기에 등숙률의 향상이 그 주요 원인이었다. 결국 수박재배에서 시용한 유기물과 비료성분들이 벼 재배에 일정량 이용될 수 있고 이로 인하여 벼 재배에서는 질소시비량을 줄일 수 있었으며, 추가로 병해충 발생감소와 미질향상의 효과를 규산질비료 시용을 통해서 가능한 것으로 사료되었다. 규산시용에 따른 미질의 향상은 수량이 관행보다 높은 경우에는 유의적인 차이를 보이지 못하였고 비슷한 수량 조건에서는 관행구보다 우수한 미질을 나타내어 적절한 수량과 미질이 우수한 시비체계는 질소 50% 감비에 규산 200% 시용방법이 유리한 것으로 사료된다. 규산 시용에 의한 단위면적당의 광합성활성은 효과가 없었으나, 식물체 전체의 광합성량은 엽면적과 엽신건물중의 증가로 무 규산구보다 높았으며, 순광합성량에 가장 큰 영향을 미치는 형광은 규산 처리구에서 효과적이었다. 결국 규산 시용으로 인한 형광특성의 개선이 벼 식물체 전체 광합성 효율을 높였고 또한 근활력과 건물중의 증가를 고려해 볼 때 수량을 증가 시킬 수 있는 포텐셜을 충분히 내재하고 있는 것으로 사료되었다. 결국 포장조건에서의 규산질비료의 시용은 칼슘과 마그네슘 등의 공조효과가 규산질 단독시용보다는 크며, 규산단독의 효과는 초장과 분얼수, 근활력, 건물중 등에서 낮은 질소시비조건보다는 높은 질소시비조건에서 더욱 유의적인 차이를 나타내는 것은 시비모델식과 일치하였다.

• 한국산림과학회지
• /
• 제96권5호
• /
• pp.520-527
• /
• 2007

Biomass and species diversity of understory vegetation after fertilization were studied for 28-year-old Quercus acutissima plantation (MQA), 29-year-old Pinus densiflora plantation (MPD), 8-year-old Betula platyphylla var. japonica plantation after coal reclamation (YBP), and 4-year-old Pinus densiflora plantation after forest fire (YPD) in central Korea. Nitrogen + phosphorus + potassium (6:4:1) fertilizer was applied for 3 years from 2004. Thereafter photosynthetically active radiation (PAR) and understory species richness and diversity were measured in late July-early August 2006. PAR (${\mu}mol\;m^{-2}S^{-1}$) was higher at the fertilization treatment (100.9) than at the control (67.0) for MQA while was lower at the fertilization treatment (156.5) than at the control (268.7) for MPD. Total understory biomass (t $ha^{-1}$) was lower at the fertilization plot (1.8) than at the control plot (3.0) for YPD, however, there were no differences in biomass between fertilization and control plots for MQA, MPD and YBP. Total species number of understory vegetation was higher for fertilization than for control at MPD (47 vs. 45) and YPD (21 vs. 13), and was higher for mature plantations (33 vs. 37 for MQA and 47 vs. 45 for MPD) than for young plantations (16 vs. 16 for YBP and 21 vs. 13 for YPD). Species richness and diversity were higher at the fertilization treatment than at the control for MQA, YBP, and YPD while were lower at the fertilization treatment than at the control for MPD, however, the differences were not statistically significant. Our results indicate that there were no consistent patterns in light conditions, biomass and species richness and diversity of understory vegetation following fertilization. More detailed long-term studies with different fertilizer applications would be necessary to conclude the influence of fertilization on understory vegetation in the region.

• 대한한방부인과학회지
• /
• 제25권4호
• /
• pp.94-104
• /
• 2012

Purpose: The purpose of this paper is to report the effect of Korean medicine treatments on a female and a male patient who were infertile and failed to in vitro fertilization(IVF) treatment. Methods: The patients are a 30-year-old female who had been diagnosed with the ovulation dysfunction caused by the depression of ovarian function, and a 33-year-old male who had been diagnosed with sperm defect. The female patient alone underwent Korean medicine treatment after the eighth failure in IVF treatment and the male patient received Korean medicine treatment along with his wife after he failed in the first IVF treatment. The Korean medicine applied include herb-medicine administration, acupuncture, moxibustion, Jwa-Hun, and Du-Han-Jok-Yeol treatment. Results: Through Korean medicine treatment the female patient had succeeded in the IVF treatment and she also recovered completely from allergic rhinitis. The male patient whose wife also received Korean medicine treatment with him got his wife pregnant naturally. Conclusions: This result concludes that Korean medicine treatment is effective in infertile patients. Therefore, there needs to be more of subsequent research on infertile patients that is based on Korean medicine treatment.