Yunjing 29 bred by Institute of Food Crops of Yunnan Academy of Agricultural Sciences is a new conventional japonica rice variety with fragrant and sof rice, it was examined and approved by Yunnan Provincial Variety E...Yunjing 29 bred by Institute of Food Crops of Yunnan Academy of Agricultural Sciences is a new conventional japonica rice variety with fragrant and sof rice, it was examined and approved by Yunnan Provincial Variety Examination and Approval Committee in March of 2011. The variety is early-maturing, high-yield and good-quality, and has resistances to lodging, blast and bacterial leaf blight, its rice is sweet soft, goluptious and lucidus as well as not coarse when it is cold, so it is a good commodity. To further promote the popularization and cultivation of the variety, maintain its characteristics of high quality and high yield, and prevent commingling and degeneration, the purification and rejuvenation as well as breeding technology of high-quality seeds were proposed after continuous exploration and study.展开更多
Fruitlet abscission （cherelle wilt） is a major factor contributing to lower productivity of cacao plantation in Indonesia. An attempt was made to reduce such cherelle wilt by spraying plant growth retardants （PGRs...Fruitlet abscission （cherelle wilt） is a major factor contributing to lower productivity of cacao plantation in Indonesia. An attempt was made to reduce such cherelle wilt by spraying plant growth retardants （PGRs） on cacao trees at about 10 weeks before flowering session. The treatment was repeated every three weeks. Both the flowering initiation time and the number of flowers on the treated trees were improved significantly. With the most effective composition, flowers were initiated at 24 days after spraying （DAS）, where as the flowering initiation was 11-day later in the controls. At the 35 DAS, the chlorocholine chloride （CCC） 2,000 treatment induced about 20-80 folds more flowers than the controls. Extended observation was made to assess the treatment effect on the fruiting capacity. The treatments were found to improve fruiting ability by increasing the number of fruits set on the trees and shortening the time for fruit setting. At 20 weeks after the first spraying （WAS） there were on average 12.57 fruits per CCC 2,000-treated tree, as opposed to only 4.14 fruits per untreated tree. Analyses of the metabolites content in the flower cushions of the trees indicated that the reproductive growth is significantly correlated with the increased metabolites particularly the reduced sugar. Exogenous addition of sucrose to the PGR treatment gave greater improvement mainly in the fruiting. In conclusion, foliar spray of CCC induces flowering of cacao tress in the field that leads to improve the fruitlets productivity.展开更多
基金Supported by the Project of Technology Innovation and Talent Cultivation in Yunnan Province(2015HB107)the Project of New Product Development of Yunnan Province"The Breeding of New Conventional Rice Variety and Its Industrialization Development"(2012BB013)+3 种基金the Major Special Project of Biological Seed Industry in Yunnan Province"The ResearchApplication of the Key Technology of the Industrialization of Plateau Japonica Rice Seed Industry"(2015ZA003)the Project of"Leading Talents Training of Yunling Industrial Technology"in Yunnan Provincethe Project of Rice Industrial Technology System of Modern Agriculture in Yunnan Province~~
文摘Yunjing 29 bred by Institute of Food Crops of Yunnan Academy of Agricultural Sciences is a new conventional japonica rice variety with fragrant and sof rice, it was examined and approved by Yunnan Provincial Variety Examination and Approval Committee in March of 2011. The variety is early-maturing, high-yield and good-quality, and has resistances to lodging, blast and bacterial leaf blight, its rice is sweet soft, goluptious and lucidus as well as not coarse when it is cold, so it is a good commodity. To further promote the popularization and cultivation of the variety, maintain its characteristics of high quality and high yield, and prevent commingling and degeneration, the purification and rejuvenation as well as breeding technology of high-quality seeds were proposed after continuous exploration and study.
文摘Fruitlet abscission （cherelle wilt） is a major factor contributing to lower productivity of cacao plantation in Indonesia. An attempt was made to reduce such cherelle wilt by spraying plant growth retardants （PGRs） on cacao trees at about 10 weeks before flowering session. The treatment was repeated every three weeks. Both the flowering initiation time and the number of flowers on the treated trees were improved significantly. With the most effective composition, flowers were initiated at 24 days after spraying （DAS）, where as the flowering initiation was 11-day later in the controls. At the 35 DAS, the chlorocholine chloride （CCC） 2,000 treatment induced about 20-80 folds more flowers than the controls. Extended observation was made to assess the treatment effect on the fruiting capacity. The treatments were found to improve fruiting ability by increasing the number of fruits set on the trees and shortening the time for fruit setting. At 20 weeks after the first spraying （WAS） there were on average 12.57 fruits per CCC 2,000-treated tree, as opposed to only 4.14 fruits per untreated tree. Analyses of the metabolites content in the flower cushions of the trees indicated that the reproductive growth is significantly correlated with the increased metabolites particularly the reduced sugar. Exogenous addition of sucrose to the PGR treatment gave greater improvement mainly in the fruiting. In conclusion, foliar spray of CCC induces flowering of cacao tress in the field that leads to improve the fruitlets productivity.
