A. Irawan, Yoshinori Yamamoto, A. Miyazaki, Tetsushi Yoshida, F. Jong
{"title":"Growth Performance of the Transplanted Sago Palm ( Metroxylon sagu Rottb.) Suckers with Different Earliness of Trunk Formation","authors":"A. Irawan, Yoshinori Yamamoto, A. Miyazaki, Tetsushi Yoshida, F. Jong","doi":"10.11248/JSTA.56.81","DOIUrl":"https://doi.org/10.11248/JSTA.56.81","url":null,"abstract":"","PeriodicalId":118800,"journal":{"name":"Tropical agriculture and development","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124471647","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. Tateishi, Y. Kamiyoshihara, F. Miyohashi, H. Shiba, Yoshiyuki Imura, Keiichi Watanabe, K. Nomura, H. Inoue
{"title":"Characterization and Expression Analysis of a Putative α-L-Arabinofuranosidase/β-D-xylosidase Gene Derived from Avocado","authors":"A. Tateishi, Y. Kamiyoshihara, F. Miyohashi, H. Shiba, Yoshiyuki Imura, Keiichi Watanabe, K. Nomura, H. Inoue","doi":"10.11248/JSTA.59.7","DOIUrl":"https://doi.org/10.11248/JSTA.59.7","url":null,"abstract":"","PeriodicalId":118800,"journal":{"name":"Tropical agriculture and development","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129503176","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Increasing rice yield in rainfed fields is one of the major agricultural challenges in Cambodia. As an answer to this challenge, we focused on the System of Rice Intensification (SRI), which has been reported to increase rice yield while reducing water use, and has actually been adopted by many farmers. To elucidate how SRI can increase rice yield under water constraint in rainfed fields, we conducted an interview study with 106 farming households in Popel commune, Tram Kak District, Takeo Province of Cambodia in 2015, and asked them about the wet season rice in 2014. The farmers cultivated rice in total of 167 fields, of which 35 fields were under SRI practices whereas 132 fields were under conventional ones. We found that SRI was practiced more often in fields where supplementary water was available from ponds, rivers, and tube wells than those without it. In the former fields, SRI increased rice yield, whereas it did not in the latter fields. In SRI fields without supplementary water, younger seedlings planted earlier should have experienced severer water stress than those in conventional fields, and lost advantage of SRI to develop more tillers and thereby more grains. The dependency of yield increase by SRI on supplementary water availability implies that the prospect of rice yield increase via greater adoption of SRI would hinge on the capacity to increase supplementary water availability in the rainfed fields.
{"title":"Rice Yield Increase by the System of Rice Intensification is Dependent on Supplementary Water Availability in Rainfed Lowland Fields of Southern Cambodia","authors":"Y. Lee, K. Kobayashi","doi":"10.11248/JSTA.61.48","DOIUrl":"https://doi.org/10.11248/JSTA.61.48","url":null,"abstract":"Increasing rice yield in rainfed fields is one of the major agricultural challenges in Cambodia. As an answer to this challenge, we focused on the System of Rice Intensification (SRI), which has been reported to increase rice yield while reducing water use, and has actually been adopted by many farmers. To elucidate how SRI can increase rice yield under water constraint in rainfed fields, we conducted an interview study with 106 farming households in Popel commune, Tram Kak District, Takeo Province of Cambodia in 2015, and asked them about the wet season rice in 2014. The farmers cultivated rice in total of 167 fields, of which 35 fields were under SRI practices whereas 132 fields were under conventional ones. We found that SRI was practiced more often in fields where supplementary water was available from ponds, rivers, and tube wells than those without it. In the former fields, SRI increased rice yield, whereas it did not in the latter fields. In SRI fields without supplementary water, younger seedlings planted earlier should have experienced severer water stress than those in conventional fields, and lost advantage of SRI to develop more tillers and thereby more grains. The dependency of yield increase by SRI on supplementary water availability implies that the prospect of rice yield increase via greater adoption of SRI would hinge on the capacity to increase supplementary water availability in the rainfed fields.","PeriodicalId":118800,"journal":{"name":"Tropical agriculture and development","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129972105","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ayano Shudo, Satoko Goeku, K. Tarora, N. Gima, N. Urasaki, Tsuyoshi Tokunaga, K. Ureshino, E. Miyagi, Shiro Sekizuka, S. Adaniya
{"title":"Identification of Chrysanthemum (Chrysanthemum × morifolium) Cultivars Using Flower Pigment-related Genes","authors":"Ayano Shudo, Satoko Goeku, K. Tarora, N. Gima, N. Urasaki, Tsuyoshi Tokunaga, K. Ureshino, E. Miyagi, Shiro Sekizuka, S. Adaniya","doi":"10.11248/JSTA.55.166","DOIUrl":"https://doi.org/10.11248/JSTA.55.166","url":null,"abstract":"","PeriodicalId":118800,"journal":{"name":"Tropical agriculture and development","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130079538","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
S. S. Abe, K. Ashida, K. Kamarudin, M. Kamil, I. M. Umami, Hermansah
{"title":"Soil Micronutrient Availability as Affected by Land Use and Management in a Tropical Volcanic Mountain Area of West Sumatra, Indonesia","authors":"S. S. Abe, K. Ashida, K. Kamarudin, M. Kamil, I. M. Umami, Hermansah","doi":"10.11248/JSTA.62.136","DOIUrl":"https://doi.org/10.11248/JSTA.62.136","url":null,"abstract":"","PeriodicalId":118800,"journal":{"name":"Tropical agriculture and development","volume":"163 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132014546","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. Irawan, Yoshinori Yamamoto, A. Miyazaki, Tetsushi Yoshida, F. Jong
This experiment studied the periodic changes in the growth of sago palm suckers with different generation orders from the mother palm in a clump. Those were suckers which directly generated from the rhizome base of the mother palm (S1), generated from the rhizome base of the S1 (S2), and generated from the rhizome base of the S2 (S3). Plant height and number of leaves at the start of measurement were higher in the order; S1>S2>S3. Two different treatments were employed in the clumps; those without (Plot I) and with (Plot II) maintenance practices. Those practices, such as manual weeding and cleaning the debris inside and surrounding the clumps, were only carried out for about one year. During early one year observation, no reduction in the survival rate was observed in Plot II but it reduced to 22% in Plot I. One year after the maintenances were stopped in Plot II, the survival rate of S1 remained unchanged but small reductions were observed in S2 and S3. At 45 months later, the average survival rates of S1, S2, and S3 from both Plots were 50%, 64%, and 34%, respectively. In Plot I, S3 increased their heights more rapidly compared to S2 and S1. These results were different from those in the Plot II where all measured suckers showed similar growth. In both Plots, the production of newly-expanded leaves of S1 was faster than those of S2 and S3 while S2 and S3 produced similar numbers.
{"title":"Changes in the Vegetative Growth of Sago Palm (Metroxylon sagu Rottb.) Suckers from Different Generation Orders in a Clump","authors":"A. Irawan, Yoshinori Yamamoto, A. Miyazaki, Tetsushi Yoshida, F. Jong","doi":"10.11248/JSTA.59.50","DOIUrl":"https://doi.org/10.11248/JSTA.59.50","url":null,"abstract":"This experiment studied the periodic changes in the growth of sago palm suckers with different generation orders from the mother palm in a clump. Those were suckers which directly generated from the rhizome base of the mother palm (S1), generated from the rhizome base of the S1 (S2), and generated from the rhizome base of the S2 (S3). Plant height and number of leaves at the start of measurement were higher in the order; S1>S2>S3. Two different treatments were employed in the clumps; those without (Plot I) and with (Plot II) maintenance practices. Those practices, such as manual weeding and cleaning the debris inside and surrounding the clumps, were only carried out for about one year. During early one year observation, no reduction in the survival rate was observed in Plot II but it reduced to 22% in Plot I. One year after the maintenances were stopped in Plot II, the survival rate of S1 remained unchanged but small reductions were observed in S2 and S3. At 45 months later, the average survival rates of S1, S2, and S3 from both Plots were 50%, 64%, and 34%, respectively. In Plot I, S3 increased their heights more rapidly compared to S2 and S1. These results were different from those in the Plot II where all measured suckers showed similar growth. In both Plots, the production of newly-expanded leaves of S1 was faster than those of S2 and S3 while S2 and S3 produced similar numbers.","PeriodicalId":118800,"journal":{"name":"Tropical agriculture and development","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126061889","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Developing a Remote Sensing-based Mapping Method for Swidden Land Use Detection:","authors":"Khin Nilar Swe, E. Nawata","doi":"10.11248/JSTA.64.13","DOIUrl":"https://doi.org/10.11248/JSTA.64.13","url":null,"abstract":"","PeriodicalId":118800,"journal":{"name":"Tropical agriculture and development","volume":"55 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120889661","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Effects of Temperature and Medium Composition on Pollen Germination of 'Bengal' and 'Chakrapat' Lychee ( Litchi chinensis Sonn.) in vitro","authors":"H. Matsuda, H. Higuchi","doi":"10.11248/JSTA.57.120","DOIUrl":"https://doi.org/10.11248/JSTA.57.120","url":null,"abstract":"","PeriodicalId":118800,"journal":{"name":"Tropical agriculture and development","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121065337","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Anatomical Study for Critical High Temperature on the Anthesis Day to Inhibit Passion Fruit Set","authors":"H. Matsuda, H. Higuchi, Masanori Okabe, T. Ogata","doi":"10.11248/JSTA.64.171","DOIUrl":"https://doi.org/10.11248/JSTA.64.171","url":null,"abstract":"","PeriodicalId":118800,"journal":{"name":"Tropical agriculture and development","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122389420","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Is Africa Advancing Food Security? Insights from Rural Households in Malawi","authors":"Hiroko Gono, T. Takane","doi":"10.11248/JSTA.62.24","DOIUrl":"https://doi.org/10.11248/JSTA.62.24","url":null,"abstract":"","PeriodicalId":118800,"journal":{"name":"Tropical agriculture and development","volume":"190 Suppl 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122637255","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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