Effect of Organic Fertilizer Dosage and Sod Culture on Soil Reaction, Organic Matter and Available Nutrients Content of ‘Seedless Tankan’ Tangor Orchard

Su-Feng Roan,Wan-Tin Nee 한국원예학회 2006 한국원예학회 기타간행물 Vol.- No.-

The Influence of Air and Root Temperature to the Growth and Development of Sweet Granadilla

Li-an Chen,Su-Feng Roan,Chin-Lung Lee,Iou-Zen Chen 한국원예학회 2008 한국원예학회 기타간행물 Vol.- No.-

Effect of Dietary Protein and Lysine Levels on Lactating Multiparous Sows and Litter Performance

Cheng, C.S.,Yen, H.T.,Roan, S.W.,Wu, J.F.,Hsu, J.C. Asian Australasian Association of Animal Productio 2001 Animal Bioscience Vol.14 No.1

The effects of dietary protein and lysine levels on lactating multiparous sows and litter performance were studied. Sixty-two crossbred multiparous sows ($Landrace{\times}Yorkshire$) were used. Thirty-three and twenty-nine sows were studied in their second parity and third parity respectively. The three dietary treatments were: (1) the control diet containing 15% CP and 0.75% lysine, (2) a diet containing 13% CP and 0.75% lysine (0.60% natural+0.15% synthetic), and (3) a diet containing 13% CP and 0.60% lysine. They were fed twice daily and allowed ad libitum access to food and water throughout a 28 day lactation from parturition until weaning. The results of this experiment showed that body weight and backfat losses of the sows from farrowing to weaning were significantly affected (p<0.01) by reducing dietary protein. Neither average daily feed intake nor weaning to estrus interval of sows were significantly different among treatments. Supplementing lower dietary protein with synthetic lysine could mitigate backfat losses, but could not prevent body weight losses in lactating multiparous sows. A corn-soybean meal diet containing 13% crude protein and 0.60% lysine did not significantly affect litter size and survival rate of weanling piglets compared with the 15% crude protein diet. There was a tendency towards decreased piglet weight at weaning (p<0.10) and reduced daily gain of piglets (p<0.11) when the multiparous sows were fed the 13% protein diet during lactation. We found a severe loss of body weight and backfat when reducing dietary protein for lactating multiparous sows.

Effect of Altitude on Flower Bud Differentiation and Necrosis in ‘Shinko’ Pears in Subtropical Climates

Ho-Jin Seo,Young-Ook Jin,Chin-Lung Lee,Su-Feng Roan,Iou-Zen Chen 한국원예학회 2015 원예과학기술지 Vol.33 No.1

Time-specific responses of flower bud differentiation were investigated in ‘Shinko’ (Pyrus pyrifolia Nakai) pear grown at different altitudes from July through December 2013 to determine their suitability as scions in a top-grafting system. Flower bud initiation and bud necrosis were monitored on each of three sections of one-year-old shoots: terminal, middle, and basal. Flower bud differentiation s tarted in September in the highlands of the Lishan area, and in J uly in the lowlands of the Zhoulan area. In Lishan, flower bud differentiation was higher in the middle and basal segments; during leaf fall, however, flower bud differentiation occurred rapidly in the terminal segment. In Zhoulan, flower buds began to differentiate from the terminal section of the shoot, and severe flower bud necrosis was noted. In July, flower buds developed normally; however, in early August, some of the buds at the basal segment showed browning. During leaf fall, some flower buds showed symptoms of necrosis with rapid and complete browning. Flower bud necrosis began at the basal segment and progressed rapidly towards middle and terminal sections. Before leaf fall, flower buds fell off when scales swelled. The terminal and middle parts of the current-year shoots, with some flower buds, collected in October or later from the Lishan area could be used as scions for top-grafting of ‘Shinko’ pear. Each grafting scion was a 3-5 cm shoot with one flower bud. These results suggest that scions from the terminal and middle segments of stems of ‘Shinko’ pear from the Lishan area can be used as scions whereas those from Zhoulan area show necrosis and might not be suitable as scions.

Effects of Dietary Lysine Supplementation on the Performance of Lactating Sows and Litter Piglets during Different Seasons

Cheng, C.S.,Yen, H.T.,Hsu, J.C.,Roan, S.W.,Wu, J.F. Asian Australasian Association of Animal Productio 2006 Animal Bioscience Vol.19 No.4

The effect of dietary lysine supplementation on the performance of crossbred lactating sows (n = 49, total 92 litters) and suckling piglets during the warm and cool seasons was studied. Sows were randomly allocated to one of two experimental diets, which were fed throughout a 28-day lactation period. Two diets were formulated based on corn-soybean meal with 6% wheat bran, containing 15% crude protein, and with or without 0.25% lysine-HCl supplementation. No interaction was observed between season and dietary lysine supplementation. Dietary lysine supplementation significantly (p<0.05) increased weaning weight (7.11 vs. 6.46 kg) and daily gain (0.20 vs. 0.18 kg) of piglets. During the warm season lactating sows had significantly lower feed intake (3.78 vs. 6.11 kg, p<0.01), higher weight loss (19.81 vs. 9.73 kg, p<0.01) and backfat loss (0.23 vs. 0.06 cm, p<0.01), longer interval from weaning to estrus (9.32 vs. 6.21 days, p<0.05), lower litter weight gain (42.13 vs. 52.90 kg, p<0.01) and lower daily gain (0.17 vs. 0.21 kg, p<0.01) than lactating sows during the cool season. The results indicate that the influences of dietary treatment and season were independent. The 15.0% CP lactation diet with 0.25% lysine-HCl supplementation did not improve the performance of lactating sows and litter piglets, which was impaired by the warm season.

Effect of Altitude on Flower Bud Differentiation and Necrosis in 'Shinko' Pears in Subtropical Climates

Seo, Ho-Jin,Jin, Young-Ook,Lee, Chin-Lung,Roan, Su-Feng,Chen, Iou-Zen Korean Society of Horticultural Science 2015 원예과학기술지 Vol.33 No.1

Time-specific responses of flower bud differentiation were investigated in 'Shinko' (Pyrus pyrifolia Nakai) pear grown at different altitudes from July through December 2013 to determine their suitability as scions in a top-grafting system. Flower bud initiation and bud necrosis were monitored on each of three sections of one-year-old shoots: terminal, middle, and basal. Flower bud differentiation s tarted in September in the highlands of the Lishan area, and in J uly in the lowlands of the Zhoulan area. In Lishan, flower bud differentiation was higher in the middle and basal segments; during leaf fall, however, flower bud differentiation occurred rapidly in the terminal segment. In Zhoulan, flower buds began to differentiate from the terminal section of the shoot, and severe flower bud necrosis was noted. In July, flower buds developed normally; however, in early August, some of the buds at the basal segment showed browning. During leaf fall, some flower buds showed symptoms of necrosis with rapid and complete browning. Flower bud necrosis began at the basal segment and progressed rapidly towards middle and terminal sections. Before leaf fall, flower buds fell off when scales swelled. The terminal and middle parts of the current-year shoots, with some flower buds, collected in October or later from the Lishan area could be used as scions for top-grafting of 'Shinko' pear. Each grafting scion was a 3-5 cm shoot with one flower bud. These results suggest that scions from the terminal and middle segments of stems of 'Shinko' pear from the Lishan area can be used as scions whereas those from Zhoulan area show necrosis and might not be suitable as scions.

Effects of Sire Breed on the Subsequent Reproductive Performances of Landrace Sows

Huang, Y.H.,Yang, T.S.,Lee, Y.P.,Roan, S.W.,Liu, S.H. Asian Australasian Association of Animal Productio 2003 Animal Bioscience Vol.16 No.4

Reproductive traits of sows are determined chiefly by the genetic background of the dam herself. Whether the breed of the serviced boars also contributes is not yet clear. A total of 8,946 litters of Landrace (L) sows from 68 farms were examined. Of these, 876, 1,260, and 6,810 litters were produced from natural mating with L, Yorkshire (Y), and Duroc (D) breeds, respectively. The birth litter size (BLS), weaning litter size (WLS), live born piglets (LBP), and survival rate % (SR), of every litter were recorded. A general linear-model procedure was followed to estimate the effects of boars' breed (B), parity (P) and B${\times}$P interaction on the reproductive traits of the sows. Results show that BLS, WLS, and LBP were all significantly (p<0.001) affected by B and P. SR% was significantly influenced by B but not by P. L sows crossbred with Y or purebred with L produced litters with higher BLS, WLS, and LBP values than those bred with D. Pure L breeding yielded litters with lower SR% than did crossbreeding with D, while the difference between SR% due to LY and that due to LD crossbreeding was not significant. The interaction of B with P was significant with respect to BLS, WLS, and LBP (p<0.001), but not SR%. No significant B effect on reproductive traits was measured in sows at their first parity; but at latter parities, LL or LY produced litters with similarly high BLS, WLS and LBP, which values were all significantly greater than those of LD litters. The breed of boar evidently affected the subsequent reproductive performance of L sows and this effect may be further manipulated by the parity effect. Breed differences in semen quality and the success of fetus development with different interactions of the genetic background with the uterus function of the sow that may contribute to these effects are discussed.

The Investigation and Evaluation of Pear Scion Cultivars from the Top-grafting Cultivation System in Taiwan

Ho-Jin Seo,Iou-Zen Chen,Su-Feng Roan,Janghoon Song,Kyeong-Bok Ma,Kyung Ho Won,Sang-Jin Yang,Sam-Seok Kang 한국원예학회 2019 한국원예학회 학술발표요지 Vol.2019 No.10

The Potassium to Magnesium Ratio Enables the Prediction of Internal Browning Disorder during Cold Storage of Asian Pears

Seo, Ho-Jin,Chen, Po-An,Lin, Shu-Yen,Choi, Jin-Ho,Kim, Wol-Soo,Haung, Tzu-Bin,Roan, Su-Feng,Chen, Iou-Zen Korean Society of Horticultural Science 2015 원예과학기술지 Vol.33 No.4

'Taichung No. 2' is a new Asian pear cultivar developed in Taiwan with low chilling requirement; however, is likely to develop internal browning disorder under low temperature storage conditions. We investigated the impact of storage time on flesh browning disorder in pears harvested from 22 orchards in 2010 and 2011, and analyzed the levels of nutrients in different fruit parts such as the peel, flesh, and core. Calcium and potassium contents were higher in the flesh and peel, respectively, of more severely browned fruits, whereas a lower magnesium content was recorded in the peel and core of these fruits. Nitrogen and potassium contents in the peel, and calcium content in the flesh were positively correlated with browning disorder severity. By contrast, the magnesium content in the core was negatively correlated with browning disorder severity. However, the nutrient contents in fruits varied between the two sampling years considered. Only the K/Mg ratio was an effective predictor of the browning disorder severity and showed a positive linear correlation in the two years. We recommend that the K/Mg ratio should be lower than 10 to avoid severe browning disorder in pears.

Current Status and Prospects of Small Fruit Production in Taiwan

Ho-Jin Seo,Sang-Jin Yang,Jang Hoon Song,Kyeong Bok Ma,Iou-Zen Chen,Su-Feng Roan 한국국제농업개발학회 2020 韓國國際農業開發學會誌 Vol.32 No.1

대만의 소과류 작물의 생산량은 적지만 생산 시스템은 매우 발달이 되어있다. 2017년 기준 대만 내 소과류 전체 재배면적은 2826.6 ha로 이 중 포도(500.33 ha)와, 딸기(67.56 ha)가 가장 많이 재배되고 있다. 다음으로는 오디나무 (Morus alba L.), 베이베리 (Myrica rubra Sieb. et Zucc.), 인도 구스베리(Phyllanthus emblica L.) 순으로 재배가 많이 되고 있다. 현재 대만은 새로운 품종 육성과 재배 시스템 개발을 위해 많은 노력을 기울이고 있는데 최근 블루베리를 대상으로 대만 기후에 적합한 저온요구도가 낮은 품종을 육종 중에 있으며 또한 포도와 딸기는 연중 생산이 가능한 재배법이 개발이 되어 농가에 보급되었다. 대만은 40년 이상 생과 위주의 포도 품종으로 생산을 하였으나, 최근에는 와인용 포도 품종 등을 육종 연구가 지속적으로 이루어지고 있다. Although Taiwan produces small fruits on a small scale, it is famous for its production techniques and systems. Only two types of small fruits are economically produced in Taiwan: the grape and strawberry. Four other types (the mulberry Morus alba L., the bayberry Myrica rubra Sieb. et Zucc., the Indian gooseberry Phyllanthus emblica L., and the kiwifruit or Chinese gooseberry Actinidia chinensis Planch. var. setosa and A. deliciosa Ferg.) have production areas of less than 100 ha. Taiwan has been developing production techniques for fruits such as the blueberry. In 2017, Taiwan had production areas of 2,828.6 ha for grapes, 500.33 ha for strawberries, 67.56 ha for mulberries, 31.17 ha for bayberries, and 14.19 ha for kiwifruit. The development of new small fruit crops demands new culture methods and strategies. It is important to breed or select new small fruits from the native germplasm when introducing new foreign varieties. Some special conditions, such as breeding the blueberry plant with a short chilling requirement, are needed. Further, new culture systems such as year-round production for grape, mulberry, and strawberry have been tried. Although Taiwan has cultivated grapes for wine production for over 40 years, new grape cultivar breeding programs for wine production have been introduced.