http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : 소재돈 (검색결과 80 건)
- 무료
- 기관 내 무료
- 유료
-
-
-
蘇在敦 圓光大學校大學院 1980 學位論叢 Vol.5 No.-
Studies were conducted to investigate the morphological and physico-chemical characteristics of wetland rice soils occurring in Honam area, and to find out a method for the evaluation of productivity of wetland rice soils by relating the observed soil characteristics with the experimentally obtained rice yield data. The results are summarized as following. 1. Morphological characteristics of wetland rice soils in Honam area. ˚ Topography: Rice soils occur mostly in flat plain(40.3%), local valley of hill or mountain(21.2%), and local valley of low hills(24.2%). The remainder occurs in river site(1.3%), low undulating terraces(4.8%), and low flat plain(8.2%). ˚ Slope distribution: Alomost of the wetland rice soils are found in slopes of less than 7%(0-2%;44%, 2-7%;38.7%). Around 17% of total rice soils are found in the areas with the slope of 7-15%. In the areas with 15-30% slope, only 0.7% of total rice soils are found. ˚ Soil parent materials: More than 55.7% of wetland soils are derived from local alluvium. Remainders are derived from fluvio-marine deposits(20.9%), alluvium(17.7%) and marine deposits(2.7%). ˚ Available soil depth: More than 70% of wetland rice soils have the available depth of more than 100cm. Sizeable area of them have the available depth of 20-50cm. There are soils with even less than 20cm of available depth. ˚ Soil drainage: Most widely occurring is the imperfectly drained soils(59.8%). The remainders are classified as moderately well drained (28.0%) and poorly drained(12.2%). 2. physico-chemical characteristics of wetland rice soils. ˚ Soil texture distribution: Major soil texture families are fine loamy(38.2%), coarse loamy(35.1%) and fine silty(l4.5%). ˚ Soil reaction: Most of the soils being distributed in the range of pH 5.0-6.5, in general, no problem is expected due to soil pH. However there are the soils of which pH is lower than 5.0(2.7%) and higher than 7.0(1.8%), In these soils, it is expected that the productivity of soils can be increased by correcting the pH through proper means. ˚ Organic matter contents: Majority(66.3%) of rice soils contain 2-3% of organic matter; similar to country average. However, 25% of rice soils are found to be too low in organic matter contents(2.0%). No soils with too much organic matter are found in this area. ˚ Cation exchange capacity: It is found that the cation exchange capacity of rice soils occurring in the area is generally lower than that of country average. In majority of them(71.3%), the cation exchange capacity is lower than 1Ome/100g. ˚ Exchangeable cations and base saturation ratio: In case of exchangeable Ca, the average figure being 4.5me/100g, no difference from country average is found. However, the exchangeable Mg shows unique distribution pattern. In the soils distributed in coastal and plain regions, exchangeable Mg contents are relatively higher than in other regions. Exchangeable K is high in coastal and plain regions and low in mountainous region. The soils with 60-80% of base saturation ratio occupy around 48.1% of total rice areas. In some parts of coastal region, there are the soils with the base saturation ratios of 80-100%. ˚ Available phosphate: It is found that the average content of available phosphate is high enough for rice cultivation in general. However, in 13.2% of total rice soils, available phosphate is lower than 30ppm, which is considered not to be sufficient for the elevated yield of rice. ˚ Available silica: The distribution pattern of available silica is rather peculiar; In about 28.5% of soils the available silica content is 40-70ppm, while in another 30.8% of soils it is more than 130ppm, and the remainder(40.7% of soils) is evenly distributed in the ranges of 70-100ppm and 100-130ppm. 3. The relationships between the soil characteristics and rice yield. ˚ Morphological characteristices and rice yield; Rice yield is generally high in the local valley of low hills and low in river sites. This fact is also reflected in that with the yield of rice is higher in the lands with 2-7% of slopes than in the lands with 0-2% slopes. It is found that the available soil depth influences the yield of rice strikingly. On the soils with the available depth of less than 20㎝ the yield is extremely low. However, if the available soil depth is more than 50㎝, there is no significant difference in yield along with the increase of depth. It seems that the drainge status of soils does not influence the yield of rice if the drainage grades are in the range of moderately well to poor. However, the highest yield is observed in imperfectly drained soils. Soil parent material also influences the yielding potentials of rice soils. The highest yield is observed in the soils derived from local alluvium and lowest in soils derived from marine deposits. In Honam area where the light textured soils prevail, it is observed that the heavier the texture, the higher the yield of rice. It is also observed that in soils with extremely high in silt content the rice yield is relatively low. ˚ Chemical characteristics and rice yield: The chemical characteristics have more clear relationship with rice yield are organic matter content, CEC and available silica content. Other factors such as soil pH, contents of exchangeable cations and base saturation ratio do not show significant correlations with the yield of rice. Between the organic matter and available silica contents and CEC and rice yield, there are positive correlations, while between the pH and base saturation ratio and rice yield, although no significant statistically there are trends that the higher the pH(above 7.0) and the higher the base saturation ratio(above 80%), the lower the yield of rice. 4. Suggestion of a soil productivity classification method for wetland rice soils and evaluation of productivity of rice soils of Honam area. ˚ Derivation of soil productivity index. A new approach was made to derive a soil productivity index(PI), using the relative yield contribution coefficients(RC) and the relative suitability ratings(RR) of individual soil characteristics, as shown in following equation. ◁수식 삽입▷ (원문을 참고하세요) ˚Evaluation of soil productivity of rice soil in Honam area. Using the soils productivity index suggested above, the productivity classification for the soils occurring in Honam area in tried. The result shows that out of 138 soil units(mapping units), 34, 58, 32, and 14 soils are found to be in the productivity classes of I, II, III, and IV, respectively. It is also found that in Honam area, as a whole, the soil factor of lowest suitability rating is CEC. In coastal region low organic matter content and low CEC of soils should be considered at the first place to elevate the productivity of rice soils. In other regions, CEC is the lowest suitability factor.
-
-
-
-
新干拓地에 있어서 水稻에 대한 亞鉛施用效果에 관한 硏究
嚴大翼,蘇在敦,金漢明 전북대학교 농업과학기술연구소 1982 農大論文集 Vol.13 No.-
Studies were made to determine the effect of application of Zn-KM, ZnSO4, and FTE on yields and nutrition of rice in a newly reclaimed saline soil at Gyehwa-Do, Jeonbug. Three rates of each zinc material (0, 2.5, 5.0kg/10a) were applied in combination with gypsum (300kg/10a) and rice straw (600kg/10a), The results are as follows: 1. Application of zinc resulted in significant increases in yields of rice. No difference was obtained between zinc materials. 2. Application of zinc in combination with rice straw Save higher yields than that with gypsum. 3 The highest yields were obtained at 5.0kg/10a of Zn-KM and FTE, and at 2.Skg/10a of ZnSO4. 4. Application of gypsum and rice straw resulted in desalinization of the soil, thus reducing Na content of soil at harveet. 5. Zinc concentration in rice tissue without application of zinc showed below critical level of 20 ppm. 6 . Application zinc resulted in significant increase in zinc concentration in rice tissue at harvest. Application of 5.0kg/10a of FTE showed the highest zinc concentration of 32 ppm. 7 Application of gypsum, rice straw and 2inc resulted in increases in total nitrogen content in rice tissue at harvest.
-
根瘤菌 및 改良劑處理가 大豆의 收量 및 窒素效率에 미치는 影響
嚴大翼,蘇在敦,金漢明 전북대학교 농업과학기술연구소 1981 農大論文集 Vol.12 No.-
To investigate the effect of root nodule bacteria and soil conditioner treatment on the yield and nitrogen efficiency of soybean and the change in physicochemical property, the experiments were carried out through three years from 1978 till 1980. The results obtained were summarized as follows : 1 . Jeonnam, Songieong and Yesan soil series were treated with double superphosphate lime for the control of 5% phosphorous absorption coefficient and slaked lime of lime requirements by O.R.D. method as a soil conditioner. and root nodule bacteria by coating method were inoc-ulated into all the above three soil series. Their treatment plots were generally improved the Physicochemical properties of soil and increased the factors of fertility compared with the other untreated plots. 2. The increase in yield of soybean was observed in treatment number 8>9>7>6>5>4 in order of degrees of increase. And the activity of root nodule bacteria was also activated in these plots of yield increase and the formulation of root nodule was a qreat quantity. The positive correlation and the significant difference between fresh weight and yield of root noduleper hill were observed. 3. In considering the relation between the fresh weight and nitrogen efficiency of root nodule, nitrogen efficiency was high in the increased plots of fresh weight of root nodule, and correlation between them was positive. 4. The positive correlation and the highly significant difference was observed between the nitrogen efficiency and yield of soybean.
-
-
땅콩의 근류형성(根瘤形成)과 질소고정(窒素固定)에 대한 근류균(根瘤菌) 접종방법(接種方法)의 영향(影響)
김무기,소재돈,박건호,최대웅,Kim, Moo-Key,So, Jae-Don,Park, Kun-Ho,Choi, Dae-Ung 한국토양비료학회 1992 한국토양비료학회지 Vol.25 No.1
Effective strains of cowpea bradyrhizobia JB7 $nal^rspe^r$ and CB756 $str^rrif^r$, antibiotic-resistant variants of JB7 and CB756, respectively, were used to examine changes of rhizosphere populations and nodule occupancy. Populations of each strain increased gradually in the rhizosphere, reaching a maximum of about $10^8$ cells per root system. Nodule number increased as the density of inoculum increased from $10^2$ cells to $10^8$ cells per seed. Inoculation with liquid suspension resulted in the formation of more nodules than the peat slurry or granule inoculation. When JB7 $nal^rspe^r$ and CB756 $str^rrif^r$ were introduced in equal numbers in inoculum mixtures the former consistantly occupied the majority of nodules with all three groundnut cultivars used. There was no difference in yield between nitrogen treatments and inocultation treatments. 항생제 내성 변이균주 JB7 $nal^rspe^r$와 CB756 $str^rrif^r$을 이용하여 살균하지 않은 밭토양에서 접종방법이 근류균의 증식과 근류형성 및 질소고정에 미치는 영향을 조사하였다. JB7 $nal^rspe^r$균주(菌株)를 종자당 $10^2$에서 $10^8$세포수준으로 접종(接種)했을때 접종농도(接種濃度)의 증가와 함께 근류형성(根瘤形成)이 증가하였다. 접종방법별(接種方法別)로는 YMB배양 액체접종(液體接種)이 Peat slurry나 Peat입자(粒子) 접종(接種)보다 더 많은 근류(根瘤)를 형성(形成)했고, Peat slurry와 입자(粒子) 접종간(接種間)에는 차이가 없었다. 토양(土壤) g당 $10^3$ 세포(細胞)의 근류균(根瘤菌)을 함유(含有)하는 토양(土壤)에 JB7 $nal^rspe^r$와 CB756 $str^rrif^r$을 혼합(混合)하여 접종(接種)했을때 모든 근류(根瘤)가 접종균(接種菌)에 의하여 형성되었으며, JB7 $nal^rspe^r$균주(菌株)에 의한 근류점유율이 월등히 높았다. 품종간에 근류점유율의 차이는 없었다. 접종균류(接種菌株)는 근권에서 점진적으로 증식되었으며, JB7 $nal^rspe^r$가 더 큰 폭으로 증가되었다. 땅콩의 수량은 무접종구보다 접종구가 높았으나 질소처리구(窒素處理區)와 접종구간에는 차이가 없었다.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
