南方农业学报2012，Vol.43Issue(9)：1287-1290,4.DOI:10.3969/j:issn.2095-1191.2012.09.1287
甘薯不同时期干物质积累及光合特性研究
Dry matter accumulation and photosynthetic characteristics of sweet potato at different growth stages
摘要
Abstract
[Objective]The photosynthetic characteristics of sweet potato with different dry matter rate and sweet potato's yield potential at different growth stages were studied in order to provide references for improving sweet potato production. [Method]Two sweet potato varieties, Guifen 2 and Bendishu, were used to test the dry matter rate of their corresponding root tuber, leaf photosynthesis, freshness, and dry potato yield. [Result]Dry matter rate of Guifen 2 with high starch content increased during the growth period of 77-107 days, and then it decelerated a bit and kept the same a certain level after 107 days. Dry matter rate of Bendishu with low starch content gradually increased with only a little variation during the entire growth period. During the growth period of 36-77 d, the net photosynthetic rate, transpiration rate, and stomatal conductance of the two cultivars grew constantly; but after 77 d, they all decreased substantially. Intercellular CO2 concentration accelerated during the growth period of 36-60 d, then descended after 60 d. At different growth stages, four indicators viz., net photosynthetic rate, transpiration rate, stomatal conductance, and intercellular CO2 concentration in Guifen 2 with high starch content were higher than those of Bendishu. [Conclusion]High starch content type Bweet potato Guifen 2 produced less fresh potato than low starch content type sweet potato Bendishu, while dry matter rate, dry potato yield, and photosynthetic ability of Guifen 2 were higher than those of Bendishu. Photosynthetic rate change of Bendishu was caused by stomatal limitations, whereas that of Guifen 2 was caused by stomatal and non-stomatal limitations.关键词
甘薯/干物率/光合特性/产量Key words
sweet potato/ dry matter content/ photosynthetic characteristics/ yield分类
农业科技引用本文复制引用
黄咏梅,李彦青,吴翠荣,李慧峰,陈天渊,卢森权..甘薯不同时期干物质积累及光合特性研究[J].南方农业学报,2012,43(9):1287-1290,4.基金项目
国家甘薯产业技术体系南宁综合试验站资助项目(CARS-C-19) （CARS-C-19）
广西青年科学基金项目(桂科青0991070) （桂科青0991070）
广西农业科学院重点项目(桂农科2011YZ205) （桂农科2011YZ205）
广西农业科学院科技发展基金项目(桂农科2011JM03) （桂农科2011JM03）
