• 한국작물학회지
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• 제25권1호
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• pp.25-30
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• 1980

수도 6개품종과 육도 7개품종을 동시에 논재배와 밭재배 하였을 때 양조건하에서 일어나는 변이를 수량과 수최구성요소 및 미질면에서 검토한 바 다음과 같은 결과를 얻었다. 1. 수량은 수도나 육도 모두 논재배에서 증가하였는데 그 증가정도가 육도보다 수도에서 현저하였으며 논재배에서는 수도가, 밭재배에서는 육도가 더 높은 수량을 내었다. 2. 1ℓ중, 1000입중 및 수당입수에 있어서 수도는 전체적으로 논재배에서 높았으나 육도는 품종간에 변이의 차리가 있었으며 주당수수는 대부분 논재배에 서 증가하였다. 3. Amylose 함량은 메벼의 대부분이 밭재배에서 증가하였으나 찰벼에서는 논재배에서 증가하였으며 Alkali 붕괴도와 단백질함량은 전반적으로 밭재배에서 증가하는 경향이었다.

• 한국작물학회지
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• 제24권4호
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• pp.19-25
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• 1979

수도와 육도 각 10 품종씩을 동시에 논재배와 밭재배 하였을 때 양조건에서 일어나는 변이를 생태적면에서 검토한 바 다음과 같은 결과를 얻었다. 1. 초장신장과 출엽속도는 전생육기간을 통하여 수도와 육도 모두 밭재배보다 논재배에서 빨랐다. 2. 엽신장은 전체적으로 수, 육도 모두 밭재배에서 길었으며 특히 3절위엽에서 가장 길었다. 또한 수도는 양 재배조건간의 변이에 품종간 차이가 있었으나 육도는 전품종이 밭재배에서 증가하였다. 3. 엽각과 엽폭은 수, 육도 모두가 대체적으로 밭재배에서 증가하는 경향을 나타내었으며 엽수는 전품종이 논재배보다 밭재배에서 증가하였다. 4. 출수는 전품종이 밭재배에서 현저히 지연되었으며 그 지연도는 육도보다 수도에서 컸다. 5. 간장은 수도의 전품종과 대부분의 육도가 논재배에서 증가하였으며 수장은 수도가 논재배에서, 육도가 밭재배에서 증가하는 경향이었고 고중은 대부분이 논재배에서 증가하는 편이었으나 Indica형의 육도는 밭재배에서 증가하였다.

• Applied Biological Chemistry
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• 제34권2호
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• pp.187-189
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• 1991

Gelatinization temperatures of upland and lowland waxy brown rice starches annealed at $25^{\circ}C$ and $60^{\circ}C$ for 24hr were investigated with differential scanning calorimetry No annealing effect was observed at low temperature. The upland rice starch showed narrower range of gelatinization temperature upon annealing treatment at $60\circ}C$ compared with the lowland rice starch. The enthalpy of gelatinization was not changed in case of the upland rice starch but was increased in case of the lowland one upon annealing.

• Applied Biological Chemistry
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• 제34권1호
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• pp.75-76
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• 1991

Bran structure and gelatinization property of upland and lowland japonica waxy brown rice were compared. Dimension, weight and number of aleurone layer were similar between upland(Nonglimna 1) and lowland(Shinsunchalbyeo) rices, but the aleurone layer and pericarp of upland rice were thicker. Water uptake rate of upland rice at $60^{\circ}C$ was lower than that of lowland one. There was no difference in intrinsic viscosity between two rice starches. Upland rice starch had lower onset temperature, narrower gelatinization temperature and lower water content lot gelatinization compared with lowland rice starch.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2022년도 추계학술대회
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• pp.99-99
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• 2022

This study was carried out to select the excellent silage maize varieties customized for paddy cultivation that is vulnerable to lodging and waterlogging in the central and region. Ten varieties (Kwangpyeongok, P3394, etc.) were sown with 3 replicates in Suwon, Gyeonggi-do. It was sown twice in April and June of each year in 2020-2021 and harvested during the yellow ripe stage suitable for silage. The number of days to flowering stage in lowland condition increased up to 11 days compared to that in upland condition. In April seedling, varieties that showed a relatively small decrease in biomass production and total digestible nutrients (TDN) under lowland condition compared to upland condition were Gangdaok and Kwangpyeongok in 2020, and Dacheongok, Gangdaok and Kwangpyeongok in 2021. Kwangpyeongok, Gangdaok, and Sinhwangok showed relatively higher biomass production and TDN than the other varieties under lowland compared to upland in both 2020 and 2021. Our results suggest that Kwangpyeongok and Gangdaok are suitable silage maize varieties for lowland cultivation in the central region of Korea.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2022년도 추계학술대회
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• pp.100-100
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• 2022

This study was conducted in 2021 using Kwangpyeongok and Gangdaok, that showed good yield performance both under upland and lowland conditions in the previous year. The experiments were carried out by sowing on April 22, May 14, May 30, June 19, and July 10, with aim to determine optimum sowing date in central region of Korea. The growing degree days (GDD) required to read the flowering stage were 1375.5-1725.3℃ for upland and 1582.7-1982.4℃ for lowland condition. The lowest GDD was observed in July 10 sowing regardless of ridge formation both under lowland and upland conditions for Kwangpyeongok. However, Gangdaok showed the lowest GDD under no-ridge in lowland and high-ridge in upland, both of which were sown on June 19. The difference in GDD between no-ridge and high-ridge treatment was little depending on the sowing date. In both lowland and upland, there was no significant difference between no-ridge and high-ridge treatments in stover dry matter, ear dry matter, and TDN between no-ridge and high-ridge treatments. Under upland condition, no significant difference in biomass and TDN was observed among sowing date treatments and between varieties. Under lowland condition, biomass production was severely reduced in May 30 sowing treatment, whereas no varietal difference was observed. Reduced biomass in May 30 sowing treatment may be due to excess waterlogging and lodging by rainfall.

• Asian-Australasian Journal of Animal Sciences
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• 제23권2호
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• pp.253-262
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• 2010

This study aimed to evaluate the nutritional situation of pigs kept in three ecological zones of central Vietnam: Upland, Lowland and Coastal Area. An interview-based questionnaire was made and surveys were conducted in 27 villages and data were collected from 1,200 participating households. The current study showed that amounts of feed and crude protein content in the diets for fattening pigs and sows are deficient for all three regions. Amounts of feed as DM (kg/d) fed to growing pigs of 20-50 kg BW was deficient by 0.54 kg (29%) in Lowland, 0.53 kg (28.6%) in the Coastal area and 0.42 kg (22.4%) in Upland. The deficiency in CP in the diets of growing pigs in this period (20-50 kg) was largest at 20.7 g/d (62.1%) in Lowland, following by 22.1 g/d (66.4%) in Coastal and 23.2 g/d (69.7%) in Upland. Amount of feed as DM (kg/d) fed to growing pigs of 50-90 kg BW had a deficiency of 1.26 (48.9%), 1.25 (51.2%) and 1.14 (51.5%) kg/d in Lowland, Coastal and Upland, respectively. The deficiencies in crude protein in the growing diet during this period in Lowland, Coastal and Upland regions were 27 g/d (68.3%), 29 g/d (71.9%) and 30 g/d (74.6%), respectively. The deficiency in DM intake (kg/d) of pregnant sows in the Lowland area was 0.3 kg (15%), 0.33 kg (16%) in the Coastal area and 0.47 kg (23.5%) in the Upland area. Crude protein content in the diet of pregnant sows raised in Lowland was 8 g/d (32.0%) deficient, in the Coastal region the deficiency was 11 g/d (42.7%) and in Upland this deficiency was 15 g/d (61.2%). The deficiency in DM intake (kg/d) of lactating sows raised in Lowland was 1.47 kg (31.1%), in the Coastal area this was 1.69 kg (39.2%) and in Upland it was most deficient at 2.46 kg (57.1%). The lack of crude protein content in the diets of sows raised in Lowland was 45 g/d (63.4%), in the Coastal region it was 46 g/d (65%), and in Upland it was 55 g/d (78.9%). The low input of feed in these areas is especially due to low quality and to the insufficient intake of nutrients by the pig. As a result, production and income of farmers are low.

• Asian-Australasian Journal of Animal Sciences
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• 제16권9호
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• pp.1390-1396
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• 2003

This research investigates the use of crossbreed cattle (Red Sindhi${\times}$Yellow Local cattle) at household level in the lowland and mountainous zones in Quang Ngai province, Vietnam. The internal and external inputs and outputs of mixed farming systems were analysed to quantify the productivity and efficiency of the use of the crossbred and yellow local cattle. In the mountainous zone, households with crossbred cattle had a lower crop and farm efficiency rate than households without crossbred cattle, but in terms of crop, livestock and farm productivity they did not differ. In the lowland zone, households with crossbred cattle had a higher crop, livestock and farm productivity and crop efficiency rate than households without crossbred cattle, but did not differ in terms of farm efficiency rate. The lowland zone had higher off-farm income, crop and household productivity, but lower livestock productivity, livestock and farm efficiency rate than the mountainous zone. Households with crossbred cattle had lower off-farm income than households without crossbred cattle. The results suggest that interactions between zone and kind of household occur at the households and show that the yellow local cattle is a better breed in the mountainous zone and more or less comparable with crossbred cattle in the lowland zone. The extrapolation of the use of crossbred cattle should be carefully considered in line with feeding practice and management.

• 한국자원식물학회지
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• 제31권4호
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• pp.378-383
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• 2018

최근 육성된 곰취 신품종 '쌈마니'의 고랭지와 평난지 다수확 재배를 위한 적정 재식거리를 구명하고 자 본 연구를 수행하였다. 재배지역은 표고가 해발 750 m인 고랭지와 해발 20 m인 평난지에서 하였으며, 재식거리는 $20{\times}20$, $20{\times}30$, $30{\times}30$, $35{\times}40$, $40{\times}40cm$ 등 5처리를 하고 난괴법 3반복으로 정식하고 노지에서 35% 차광재배를 하였다. 1년차 '쌈마니' 품종의 생육은 평난지보다 고랭지에서 컸으나 엽수는 고랭지보다는 평난지가 많게 나타났고, 재식거리간에는 $40{\times}40cm$구가 가장 많았고 재식거리가 넓을수록 많은 경향이었다. 그러나 주당 엽중은 평난지보다 고랭지가 더 높게 나타났다. 10a당 엽수는 고랭지보다 평난지가 많았으며, 재식거리가 좁을수록 많은 경향을 보였고, 평난지 $20{\times}20cm$ 재식구에서 543.5천매로 가장 많았다. 수량은 평난지보다 고랭지가 약간 많은 편이었으며 $20{\times}20cm$ 재식구에서 2,983 kg/10a로 가장 많았다. 2년차에도 생육은 고랭지가 컸으며 엽수와 엽중에서도 고랭지가 높게 나타났으며 수량에 있어서도 같은 경향이었다. 재식거리간에는 2지역 모두 재식거리가 좁은 $20{\times}20cm$ 재식구에서 높았는데 평난지는 3,369 kg/10a, 고랭지는 7,257 kg/10a로 나타났다. 3년차의 생육은 고랭지가 평난지보다 약간 좋은 편이나 큰 차이를 보이지 않았으며 경직경은 유사하였다. 그러나 주당 엽수와 엽중에 있어서는 고랭지보다는 평난지에서 많았으며 재식거리간에는 재식거리가 넓을수록 많아지는 경향을 보였다. 그러나 10a당 엽수와 수량을 보면 역시 고랭지보다 평난지가 많았으며 재식거리간에는 재식거리가 좁을수록 수량성이 높아 평난지 $20{\times}20cm$ 재식구에서 6,051 kg/10a로 가장 높게 나타났다. 3년간의 수량 변화를 보면 평난지는 3년차까지 계속 높아지나 고랭지에서는 2년차가 가장 많고 3년차에는 약간 떨어지는 경향을 보였다. 재식거리 간에는 2지역 모두 재식거리가 좁을수록 수량이 많고 잎의 크기는 작아지는 경향이었다.

• Journal of Plant Biology
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• 제30권2호
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• pp.117-133
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• 1987

The diatoms were investigated at three lowland swamps in Haman county form July, 1983 to July, 1984 on monthly interval. Seasonal changes of standing crops, the variation of dominant species and species composition were studied. The maximum of standing crops showed bimodal pattern at Chilnalpol and Yujnnup. Dominant species were Navicula crytocephala, Cocconeis placentula, Achnanthes minutissima, Achnanthes lanceolata, Synedra ulna, Eunotia lunaris. Dominant species changed seasonally. Total 166species of diatom were identified. Three lowland swamps supported a rich diatom flora composed of many species typically associated with benthic diatom.