• 아시안잔디학회지
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• 제7권2_3호
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• pp.113-120
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• 1993

Dictyostelid cellular slime molds were quantitatibly isolated from Korean lawngrass turf in Seoul National University, Korea, by the 'Clonal Isolation Technique(Cavender and Raper, 1965a)'. Total six species were found. These are Dictyostelium sphaerocephalum. D. purpuream. D. flavidam, D. crassica ale, Polysphondilium pallidum. P. violaceum. D. sphaerocephalum was the dominant species and P. violaceum, D. flaviidum, D. crassicaule were rare. Compared with other region, species diversity and species richness of Korean lawngrass turf appeared to he low. The dominant species, however, is not very common in other plant communities, so it cnay he characteristic of Korean lawngrass turf.

• 아시안잔디학회지
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• 제8권2호
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• pp.93-100
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• 1994

This experiment was carried our in order to study effect of alum sludge compost of water treat-ment plant on the growth of Korean lawngrass (zoysia japonica Steud.) and on the change of soil chemical properties. Alum sludge compost was made out of chicken feces, sawdust and alum sludge. The results obtained are summarized as follows : 1. Alum sludge compost was appropriate for organic fertilizer of turfgrass management in golf course. 2.Application of alum sludge compost improved the chemical properties of soil such as pH, available phosphorous and exchangeable calcium. Also the growth of Korean lawngrass grown by the mixed application of alum and compost was more effective than that in single application of compost. 3.Chlorophyll content of Korean lawngrass had no differences in several treatments. 4. Alum promoted the uptake of potassium, calcium and the yield of dry weight hut the yield of dry weight was not affected by chemical fertilizer. 5.Alumimum toxicity was decreased by the mixed application of alum and compost but increased by single application of alum.

• 아시안잔디학회지
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• 제3권1호
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• pp.39-52
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• 1989

Native Kerean lawngrass (Zeysia japonica steud.) and Manilagrass ( Zeysia matrella Merr.) are frequently used as sport turf and lawn in Kerea and ether Asian countries because of its excellent summer qualities and superior winter-hardiness compared to ether warm-season turfgrass . The objective of this study was to investigate the effect of the plant growth retardants ( PGR ) en the inhibition (d the growth of the two Kerean native turfgrasses. Kerean lawngrass and Manilagrass were treated with [2 RS , 3 RS] -1- [4- chlorophenyl ] -4, 4-dimethyl -2- [1 H -1, 2, 4- tiazol -1- y] pentan -3- ol ( PP -333) at 93 and 930 gha -j ; 5-[4- chlorphenyl ]-3, 4, 5, 9, 10- peiitaaza - tetracyclo [5, 4, 1, 0 2 6 . o ~'~I -3, 9- diene ( BAS -106) at 16 and 160 gha ; [ E I-] - cyclohexyl -4, 4- dimethyl -2- [1, 2, 4- triazol -1- yl ]-1-pentene - 3- ol ( NTN -821) at 56 and 560 gha ', and 4- chloro -2- [$\alpha$- hydrozybenzy I isonicotin anilide ( CGR -811) at 92 gha in pot study . All PGR treatments were effective in reducing the plant height, with the exception of BAS -106 at 16 gha for Korean lawngrass ; however , all increased quality to some degree , with the exception of PP -333 at 93 gha . The low PGR rates significantly increased Korean lawngrass height during late jtily aitd mid-August . On the other hand , BAS -106 significantly increased Manilagrass height {rom 24 Septeml)er onwards . All PGR treatments haol higher turfgrass quality than untreatments , and also the high rates of PGIt treatments were more effective in increasing quality than the low rates observed on 8 October . Meanwhile , Manilagrass quality was increased to some extent than Korean lawegrass . PP - 333 was significantly effective in reducing clipping yield and the same results were found with the application of NTN -821 at 560 gha -l for both Korean lawngrass and Manilagrass , BAS -106 at 160 gha for Korean lawegrass , and CGR -811 at 92 gha for Manilagrass . The high PGR rates had higher turfgrass shoot weight observed on 8 October than the low rates , and there were little increases obtained with the low rates of PP -333 for Korean lawngrass and BAS - 1 06 for Manilagrass . Effeets on stolon growth varied between growth retardants , and between retardant treatments ; the high rates of PGR as well as the low rate of NTN -821 elongated stolon of Korean lawngrass and manoilagrass . However , PP -333 at 93 gha and BAS -106 at 16 gha - shortened stolons of Korean lawugrass , resulting in inhibition or little difference of stolon dry weight . NTN -821 at 560 gha and CGR -811 had no positive effect on the stolon length of Manilagrass . 101) -333 and the low rate of BAS -106 and NTN -821 decreased root weight of Korean lawng - rass All PGR rates had negative effect on the root weight of Manilagrass with the exception of BAS -106 CR -811 and the high rate of NTN -821 which made no difference in root weight between retarolant treatments and the control .

• 아시안잔디학회지
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• 제1권1호
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• pp.7-17
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• 1987

The experiment with two levels of nitrogen (0. and 300kg / ha / year) and two levels of clipping height (1.5cm and 4cm) was conducted on the field during the period 3 June to 23 October 1985. Clonal lines of korean lawngrass ( Zoysia japonica Steud.) and manilagrass ( Zoysia matrella ( L.) Merr.)of Daejon origin were established in June, as individual clone in rows 30cm apart with a 40cm spacing between clones, actually 4 clones each plot. The results obtained were as follows : 1. When no nitrogen was applied to korean lawngrass, leaf blade which appeared during the August / early September period remained green for a period of about 10 weeks and even leaves emerged in late September lived for 42 days. However, leaf longevity did not exceed 8 weeks as nitrogen was applied. In contrast the leaf longevity of manilagrass which emerged during the mid - August / early September period was 11 weeks and, under the nitrogen applied, 9 weeks, indicating that the life - saen of individual leaf of manilagrass may be longer than that of korean lawngrass. Meanwhile, clipping height had no effect on the leaf longevity in both grasses. 2. During the July / August period, tiller number, green leaf number and DM weight of korean lawngrass were increased significantly with fertilizer nitrogen, but were not with two levels of clipping height. This trend was reversed after late September : no effect of nitrogen was appeared. Instead, lax clipping increased tiller number, green leaf number and DM weight. Green leaves stimulated by lax clipping resulted in the occurrance of more dead leaves in late October. 3. The increase of tiller number, green leaf number, and DM weight of korean lawngrass due to nitrogen application appeared to be of significance in early September. Unlike korean lawngrass, however, this significant increase was maintained to late October when new green leaves still emerge. Clipping height had little effect on the growth of manilagrass by early September, but since then, lax clipping stimulated leaf appearance, possibly resulting in a remained green color of manilagrass turf. 4. Among the stolons outgrown until early September, the primary stolon was not influenced by nitrogen and clipping treatments to produce only 2 - 3 stolons. However, 1st branch stolon as affected by nitrogen increased significantly, so most of stolons which occurred consisted of 1st branch stolon. 5. Until early September, stolon length obtained at nil nitrogen level was chiefly caused by lengthening the primary stolons. By applying nitrogen the primary stolons of korean lawngrass was longer than 1st branch stolons when severe clipping was involved and in turn, shorter than 1st branch stolons when lax clipping was concerned. In manilagrass, 1st branch stolons were much longer than the primary stolons when turf was clipped severely but in conditions of lax clipping, there was little difference in length between primary and 1st branch stolons. 6. Stolon nodes of both korean lawngrass and manilagrass were positively influenced by nitrogen, but no particular increases by imposing clipping height treatment was marked in manilagrass. Although the stolon of korean lawngrass was grown until late october, the growth stimulated by nitrogen was not so remarkable as to exceed that a by nil N. 7. The thickness of korean lawngrass and manilagrass was greatest in late September, but that of manilagrass did not differ significantly from that in late October. 8. The response of stolon length of korean lawngrass to lax clippings was not so great in late October as to that to severe clippings. On the other hand, the positive effect of lax clippings to stolon length in m anilagrass was confirmed even in late October.

• 한국잡초학회지
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• 제15권4호
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• pp.262-269
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• 1995

인공안개조건하에서 한국들잔디의 생장.잡초경합양상 및 제초제 반응을 검토코자 온실내 pot 시험으로 수행하였다. 안개조건에서 들잔디의 초장 및 엽령은 전 생육기간을 걸쳐 증가하는 경향을 보였으며 최종 파종 후 100일째 분얼수 및 지상부 생체중등의 수량은 각각 24 및 29% 감소되었다. 안개조건에서 발생 잡초수는 큰 차이가 인정되지 않았으나 그 발생량은 두배 이상으로 증가되었으며 주요한 발생초종은 바랭이, 피, 미국개기장, 쇠비름, 흰명아주, 한련초 및 방동사니류 등이었다. 안개조건에서 잡초와의 경합은 40일 이상 경합 기간의 처리가 들잔디의 초장을 크게 감소시켰고 분얼수는 전 경합기간처리에서 감소되었다. 또한 안개조건에서 pot당 입묘수 및 지상부생체중은 역시 40일 이상으로 경합기간이 길어질수록 감소하였다. 들잔디의 초장을 근거로 한 약해는 토양처리된 Oxyfluorfen에서 가장 컸고 안개처리조건하에서는 Bensulide에서 약해정도가 더 컸고 그에 따른 초장감소가 인정되었으나 Flazasulfuron 및 Mecoprop는 오히려 초장이 증가되었다. 한편 지상부생체중으로 본 약해는 Flazasulfuron 처리에서는 무처리와 대등하였으나 나머지 다른 제초제들은 심하게 증가하였다. 약제처리 후 40일째 생체중을 근거로 한 잡초방제가는 안개조건의 Bensulide 및 Mecoprop 처리에서 각각 6 및 13% 감소하였다.

• 아시안잔디학회지
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• 제5권2호
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• pp.87-94
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• 1991

This study was carried out to determine the optimal seeding rate of Korean lawngrass in three different soil textures. The results obtained are summarized as follows;1.In early development, there were not significant differences in leaf length and width except for leaf width in mean seeding rates. And there was significant difference in tillering number. Tillering number of Korean lawngrass grown in sandy clay loam soil was more abudant than that grown in sandy clay and sandy loam soils.2.The rate of ground cover of Korean lawngrass grown in sandy clay loam soil was faster than that in other soils. The ground cover rate was faster in the following order: 15, 12, 10, 7, 5, 3 kg/10a. But in sandy clay loam soil, it was showed that the plot seeded at 12kg/10a be faster than that at l5kg/10a. Plots seeded from 5 to 15kg/10a in sandy clay loam soil and 15kg/10a in sandy clay soil were showed the 100% ground cover during the period of the year seeded.3.There were not significant differences in dry weight of each part measured at 11 and l4months after seeding. But there were significant differences in dry weight of shoot and total dry weight. Total and shoot dry weight of Korean lawngrass grown in sandy clay loam soil were heavier than that in others. 4.It was revealed that the optimal seeding rate in sandy clay loam soil was 12 kg/10a. But it was suggested that the optimal seeding time and rate in each soil textures be undertaken in future.

• 아시안잔디학회지
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• 제7권2_3호
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• pp.61-66
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• 1993

This experiment was carried out in order to study effect of organic fertilizer on the growth of Korean lawngrass(Zoysia matrella L. Merr.) and the change of soil chemical characteristics. Results obtained are summarized as follows: l. Organic fertilizer was appropriate for base-dressing in the establishment of turfgrass by means of sod. 2. Chlorophyll contents in mixed application plot of complex organic fertilizer were more abundant than that in single application plot of organic fertilizer. 3. The yield of dry weight in single application plot of organic fertilizer was greater about 40% than that in control plot. 4. As a whole, the growth of Korean lawngrass in mixed application plot of complex and organic fertilizer was more greater than that in single application plot of complex fertilizer. 5. Application of organic fertilizer promote effectiveness of available phosphorous in soil.

• 아시안잔디학회지
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• 제4권2호
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• pp.77-83
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• 1990

The effect of bio-fertilizer, which was manufactured poultry manure, on the fall performance of Korean lawngrass was determined on a clay loam soil. Plant length was characterized by increasing the amount of bio-fertilizer applied. This trend was also true in dry matter yield of tops during the experimental period from August 31 through October 30. Both tiller numbers and stolon length steadily increased with increasing amount of bio-fertilizer applied, and 40m/t application of bio-fertilizer was found to be most effective on both components. performance shown on November 5 was prominent for both green leaf and root weights when the increased amount of bio-fertilizer was applied. Korean lawngrass had three times as much green leaf weight with 40m/t application of bio-fertilizer as with other treatments. Several functions of increment of above- ground part components caused by increasing root weight, which is greatly affected by bio-fertilizer application, was discussed. Turf quality was much improved by applying bio-fertilizer, indicating that this fertilizer might play an improtant role in respect of soil structure, water retention etc.

• 아시안잔디학회지
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• 제3권2호
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• pp.77-82
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• 1989

This experiment was carried out to determine the value of turfgrass clippings as a source of protein for animal feed. Levels of crude protein(CP) and in vitro dry matter digestibility(JVDMD) were determined for Korean lawngrass (Zoysia Japonica Steud.) under three levels of nitrogen fertilizer ( 0 , 350 and 700kg ha year and three levels of mowing interval between cuts (lO, 20, and 30 days). Sampling was done on the three-year old turffield on which nitrogen and mowing treatments were Imposed. Clippings were collected after mowing, and CP levels were calculated from a measurement of total N(CP = N >< 6.25) l)y Auto-analyser system-2 procedure and IVDMD by Maeng's method which was partly modified with Tilley and Terry's procedure. With the increased nitrogen legime the CP content of leaf clippings varied from 6.6 to 13.6% and that Of stem clippings from 4 to 10.3%. The CP levels of clippings were directly proportional to the N fertilization rate. The highest CP content was recorded in early July when it was 14.1% at 35OkgN ha -and I 18.l%kgN ha-1 with 10-wcek mowing interval. Mowing interval had little effect on the CP content in both leaf and stem clippings. The level of IVDMD in the Korean lawngrass clippings varied with mowing interval. The highest level measured was 47%, hut this varied during the growing season and occurred in the following order : early summer > summer > fall. This experiment has shown that Korean lawngrass clippings can he helpful source of protein for use in some animal feeds and that a high concentration of CP can occur depending upon N fertllizer and that of I VDM I) upon mowing practices.

• 한국잡초학회지
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• 제16권3호
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• pp.221-229
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• 1996

잔디의 형질전환체계를 확립하기에 앞서 효율적인 재분화 체제를 확립하고자 식물생장 조절제, 탄소원 및 $AgNO_3$가 재분화에 미치는 영향을 조사한 결과는 다음과 같다. 1. 배지(MS와 N6) 및 식물생장조절제(2,4-D와 NAA)에 따른 Korean lawngrass(Zoysia japonica Steud.)와 penncross creeping bentgrass(Agrostis palustris Huds.)의 캘러스유기는 두 품종 모두 N6배지에서 보다 MS배지에서 좋았으며, Korean lawngrass는 2,4-D 1mg/L 첨가 MS배지에서 그리고 penncross creeping bentgrass는 2,4-D 2mg/L첨가 MS배지에서 가장 좋았다. 2. 캘러스증식은 두 품종 모두 2,4-D 2mg/L함유 MS배지에 NAA 0.2mg/L 첨가하였을때 가장 좋았고, kinetin을 Korean lawngrass의 경우 0.2mg/L, penncross creeping bentgrass의 경우 0.3mg/L을 첨가하였을 때 가장 좋았다. 3. 식물체 재분화 실험에서 Korean lawngrass 잎 절편체의 재분화율은 MS배지에서 2,4-D 2mg/L+NAA 0.2mg/L+kinetin 0.1mg/L 조합처리시 44% 그리고 stock callus의 재분화율은 2,4-D 2mg/L+NAA 0.2mg/L+kinetin 0.3mg/L 조합처리시 32%이었다. penncross creeping bentgrass의 잎 절편체와 stock callus의 재분화율은 kinetin 0.3mg/L 농도에서 각각 80% 외 67%이었다. 4. Korean lawngrass의 경우 전술한 재분화 배지에 $AgNO_3$ 1mg/L를 첨가하였을 때 3~4%그리고 pencross creeping bentgrass의 경우 2mg/L를 첨가하였을 때 10~16%의 재분화율이 향상되었다.