• 한국토양비료학회지
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• 제20권1호
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• pp.85-88
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• 1987

상수리나무에 대한 모래밭버섯균(Pt)와 알버섯균(Rr)의 접종효과(接種效果) 및 적정(適正) Pt 접종량(接種量)을 구명(究明)코저 토양소독(土壤消毒)을 실시(實施)하고 균근균(菌根菌)을 접종(接種)한 결과(結果)는 다음과 같다. 1. 균근형성율(菌根形成率)은 생장(生長) 2년차(年次)에 Pt가 최고(最高) 42%, Rr이 36%로 비교적 낮았으나 1년차(年次)에는 높았을 것으로 생각된다. 2. 상수리나무묘목(苗木)의 생장(生長)은 토양소독구(土壤消毒區)에서 우세하였으며 특히 Pt 배량접종구(倍量接種區)가 가장 좋았다. 3. Rr 접종구(接種區)는 Pt 접종구(接種區)와 비슷한 생장(生長)을 하여 Rr 균(菌)의 접종효과(接種效果)가 나타났다. 4. 토양소독후(土壤消毒後) 균접종(菌接種)으로 지하부(地下部) 중량(重量)이 크게 증가(增加)하였으며 따라서 조림후(造林後) 활착율증대(活着率增大)가 기대된다. 그러나 토양무소독구(土壤無消毒區)에서는 균접종효과(菌接種效果)가 뚜렷하지 않았음. 5. 엽내양분함량(葉內養分含量)은 N과 $P_2O_5$에서 처리간(處理間)의 차(差)없이 상당히 높았고 $K_2O$와 CaO는 토양소독접종구(土壤消毒接種區)가 높아 균접종(菌接種)에 의한 양분흡수(養分吸收) 효과(效果)가 인정(認定)되었다.

• 한국산림과학회지
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• 제109권3호
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• pp.313-324
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• 2020

본 연구는 일본잎갈나무림과 침활혼효림의 입지환경이 산양삼 종묘의 초기 생육에 미치는 영향을 구명하기 위해 수행하였다. 일본잎갈나무림과 침활혼효림에 시험포지를 조성하고, 입지환경과 산양삼 종묘의 생육특성을 조사하였다. 입지환경 중에서 토양 유기물, 전질소, 양이온치환용량과 같은 토양특성은 일본잎갈나무림에 비해 침활혼효림에서 높게 나타났고, 산양삼 종묘의 생육특성 또한 일본잎갈나무림에 비해 침활혼효림에서 유의적으로 높게 나타났다. 시험포지 내 수종 비율, 토양특성, 산양삼 종묘 생육특성 간의 상관관계를 분석한 결과, 토양특성과 생육특성은 활엽수림의 비율과 유의적인 정의 상관관계를 보였고, 토양특성 중에서 유기물, 전질소, 양이온치환용량이 산양삼의 생육과 유의적인 정의 상관관계를 보였다. 본 연구에서는 일본잎갈나무림과 침활혼효림의 입지환경 중에서 임상과 토양특성이 산양삼 종묘 생육특성과 유의미한 상관관계를 보이는 것을 구명할 수 있었고, 본 연구의 결과를 바탕으로 향후 산양삼의 최적 재배지를 선정하는데 기초적인 자료로서 도움을 줄 수 있을 것으로 사료된다.

• Mycobiology
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• 제39권1호
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• pp.7-11
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• 2011

Shimizuomyces paradoxus showed no inhibitory effect against plant pathogen fungi, such as Fusarium oxysporum f. sp. lycopersici and Alternaria solani. The S. paradoxus culture filtrate showed higher seed germination and seedling growth rates in canola than distilled water and potato-dextrose broth. A conidial suspension of $1.0{\times}10^4/mL$ resulted in the highest growth stimulating effects on total plant length, and fresh and dry weight of shoots and roots in cucumber, when compared to the highest suspension concentration. Total plant length and shoot weight increased with the foliar spray treatment, and root length and root weight increased by simultaneous treatments of soil drenching and foliar spray in cucumber. Lower concentrations of the S. paradoxus conidial suspension increased the harvest of tomato fruit.

• 한국작물학회지
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• 제44권1호
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• pp.49-54
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• 1999

An experiment was carried out using pots to investigate the effects of Chinese milk vetch on the seedling establishment and growth in rice. Four irrigations with five-day intervals and three different levels of vetch straw were investigated. Significantly higher panicle numbers were obtained in vetch-treated pots. Vetch levels were non-treatment as checks, vetch with top removed, root plus shoot 7.5 ton/ha, and root plus shoot 3.0 ton/ha. The time for complete degradation of vetch straws was reduced from 10 days to 5 days as submerged time was delayed, and was affected by the amount of mulched vetch straws. As the mulched vetch amount increased, the time for a complete degradation was extended from 4 days to 12 days. Grain yield and its components were significantly affected by irrigation time and mulched vetch amount. Effectively controlled, lowered reduction damage from the degrading vetch straw, irrigation date and vetch amount were the most important factors for the improving of seedling establishment in direct-sown rice.

• Plant Resources
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• 제8권2호
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• pp.116-121
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• 2005

Compositae plants are known to contain biologically active substances that are allelopathic to agricultural crops as well as weed species. Aqueous or methanol extracts and plant residues from leaves of Xanthium occidentale were assayed against alfalfa (Medicago sativa) to determine its allelopathic effects, and the results showed that the extracts applied onto filter paper significantly inhibited seed germination as well as root growth of alfalfa. Aqueous leaf extracts of $40g\;L^{-1}$ were completely inhibitory on root growth of alfalfa, while root growths of barley (Hordeum vulgare L.) and soybean (Glycine max L.) were less sensitive. Leaf residue incorporation at $100g\;kg^{-1}$ into soil on seedling growth of barnyard grass (Echinochloa crus-galli Beauv. var. oryzicola Ohwi) inhibited both shoot and root fresh weights of barnyard grass by 94 and $96\%$, respectively. Methanol extracts from BuOn and EtOAc fractions of X. occidentale reduced alfalfa root growth more than did those from hexane and water fractions. The results based on bioassay of extracts and residues show that X. occidentale had potent an allelopathic activity against other plant species.

• Plant Resources
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• 제8권3호
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• pp.286-292
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• 2005

Shoot induction system was developed in the recalcitrant plant species, Brassica rapa ssp. rapifera by using optimum selection of profit organ, phytohormone combination, seedling age and kind of culture container. Out of in vitro cultured leaf segment, petiole, hypocotyl, and cotyledon with petiole, only cotyledon with petiole derived from 4 day-old seedlings induced multiple shoot. The optimum combination of auxin and cytokinin for the multiple shoot induction was MS medium containing 5mg/L BA and 0.5mg/L NAA. The major factors for multiple shoot propagation were part of plant organ, age of seedling, and ratio of auxin and cytokinin. In addition, shoot regeneration was promoted in the 100ml Erlenmeyer flask compared with the $90mm{\times}20mm$ Petri-dish. The induced shoots formed roots easy on MS medium containing 0.1mg/L IBA and the whole plants were successfully cultivated in soil.

• The Korean Journal of Ecology
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• 제28권4호
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• pp.189-192
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• 2005

We tested the field adaptation of Betula schmidtii on the abandoned coal-mine soil with sludge amendment methods for promoting physiological activity of B. schmidtii seedlings under several environmental stress. Sewage sludges were amended to coal-mine soil with B. schmidtii seedlings which grown in the mixture of artificial soil and composted sludge soil before transplanting (before-fertilized treatment, BF) and fertilized with composted sludge after transplanting (after-fertilized treatment, AF). The percent of establishment of seedlings for AF (80.7%) was lower than that for BF (92.7%). Nitrate reductase activity and photosynthetic pigment content were higher in AF than in BF, but malondialdehyde (MDA) content and superoxide dismutase (SOD) activity were lower in AF than in BF These results represent that after-fertilized seedlings increase resistance against physiological stress at field condition using nitrogen source of composted sludge. On the contrary, before-fertilized seedlings were susceptible to environmental stress on abandoned coal-mine soil by exhausting of nitrogen source from composted sludge.

• 한국유기농업학회지
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• 제7권2호
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• pp.153-161
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• 1999

No-till direct-sown rice-wheat relaying cropping system has major advantages such as labor and cost saving by eliminating tillage and preparation of seed bed and transplanting. In this system, rice sowing was done simultaneously wheat harvesting. A paddy field experiment was conducted to evaluate effects of no-till years on soil microbial changes and soil physico-chemical characteristics with rice growth and development. Chemical fertilizers and agricultrual chemicals was not applied in no-till system. As the year in no-till direct-sown system the air permeability was increased and after water submerging soluble nitrogen was released Aerobic microbial-n was highest in May and then decreased after water irrigation. The population of aerobic soil microorganisms were steeply decreased after water submerging Soil microorganisms was decreased with the increased the soil depth. A month was needed for the seedling establishment in a no-tillage rice-wheat cropping system. Increased cropping years improved leaf greenness and leaf area index(LAI). But stomatal conductance(Gc) was higher in conventional cultivation system than no-till system. Stomatal conductance at panicle initiation stage was increased higher in conventional condition of leaves but the difference between conventional and no-till system was increased at heading stage. In no-till 4 years condition rice grain yield was spikelet numbers per panicle.

• 한국작물학회지
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• 제55권2호
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• pp.126-132
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• 2010

천립중이 가벼워 수량은 낮으나 sucrose와 glucose함량이 상대적으로 높아 환자의 이유식 등의 사용을 목적으로 개발된 단미 벼 종자의 발아 및 출아특성과 기계이앙 상자육묘시 적정 파종량을 구명하기 위한 시험결과는 다음과 같다. 1. 단미의 비중별 분포비율은 1.0이하로 가벼운 종자가 97.4%로 대부분이었고 1.12이상인 충실한 종자비율은 2.0% 이하로 낮았다. 반면 일미벼는 단미와 달리 1.12이상 충실한 종자의 비율이 82.3%로 가장 높았고 1.0이하의 충실하지 못한 종자의 비율은 6.4%로 낮았다. 2. 비중별 발아율은 단미의 경우 88-91%로 비중에 관계없이 비슷하였으나 일미벼의 발아율은 단미와 달리 1.0이하는 24%, 1.0～1.12는 61～66%, 1.12이상은 93%로 종자 비중이 무거울수록 발아율이 높았다. 3. 발아속도도 단미 및 일미벼 모두 발아율과 비슷한 경향을 나타냈으나 비중이 1.12이상일 경우 일미벼의 발아속도는 단미보다 빨랐다. 4. 육묘를 위한 단미의 침종기간은 침종온도에 관계없이 일미벼보다 2～4일 더 길었다. 5. 단미는 일미벼에 비해 정상모의 비율이 낮고 비정상모의 비율이 높았는데 비정상모중에서 출아불량이 4.9%, 출아후 shoot의 생육정지는 4.7%, 출아후 생육불량모는 5.3%로 높았다. 6. 기계이앙 육묘시 단미의 적정 파종량은 관행 일미벼 어린모 및 중묘의 상자당 성묘개체수를 기준으로 볼때 관행과 같이 어린모는 220g, 중묘는 130g이었고 부피로는 육묘일수에 관계없이 관행 일미벼의 1.5배량이었다.

• 한국토양비료학회지
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• 제46권6호
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• pp.606-609
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• 2013

To investigate the effect of partial tillage seeding of hairy vetch on green manure biomass and rice yield, on-farm experiment was conducted at eco-friendly hairy vetch cultivation area located in Yesan-gun, Chungcheongnam-do. Seeding methods of hairy vetch consisted of partial tillage seeding (PTS) and broadcasting before rice harvesting (BBRH). Hairy vetch was incorporated into soil on May 18 and rice seedling was transplanted on May 26. The growths of hairy vetch before overwintering were investigated on November 11. Plant height of BBRH plot was longer than that of PTS plot, but somewhat larger number of seedling stand was found in PTS. Biomass and N production of hairy vetch were investigated on May 18. Results of the investigation showed no difference between two seeding methods. Although the seeding time was 21 days late in PTS, the biomass of hairy vetch and rice yield were equivalent to those of BBRH seeding, so we conclude that PTS could improve overwintering survival of hairy vetch in rice cropping system.