水分胁迫对木薯品种新选048光合特性及产量效应的影响  

Effects of water stress on the physiological characteristics and yield of cassava cultivar Xinxuan 048

作　　者：王泽平[1,2] 刘海斌[1] 罗兴录[2] 

机构地区：[1]广西农科院甘蔗研究所/中国农科院甘蔗研究中心/农业部广西甘蔗生物技术与遗传改良重点实验室,广西南宁530007 [2]广西大学农学院,广西南宁530005

出　　处：《广东农业科学》2012年第15期6-8,共3页Guangdong Agricultural Sciences

基　　金：国家农业科技成果转化资金项目(2008GB2E100248);国家科技支撑计划项目(2007BAD75B02);广西自然科学基金(桂自基0542023;桂科基0236006);广西科技攻关项目(桂科攻0782003-A1)

摘　　要：以广西大学自育木薯品种新选048为材料,设置正常供水(A)、轻度干旱(B)、中度干旱(C)和重度干旱(D)4个土壤水分处理。在木薯块根形成期(5～7月)和膨大期(7～9月)测定净光合速率、胞间CO_2浓度、气孔导度和蒸腾速率,并统计产量经济性状相关指标。结果表明,与A处理(对照)相比,B处理下净光合速率最高,木薯生长发育良好能达到高产水平;C处理下木薯生长发育受阻;D处理下木薯不能保证正常的生长态势。适度干旱有利于木薯产量的形成。Cassava variety Xinxuan 048 which bred by Guangxi University was used as experimental material with four treatments, viz.,（A）normal water supply （CK）,（B）mild drought,（C）moderate drought,and （D）severe drought.The net photosynthetic （Pn）,intercellular CO： concentration（Ci）, stomatal conductanee（Gs） and transpiration rate（Tr） were measured during the cassava root formation period （May-July） and expanding period （July-September）,and related economic characters were measured after harvest. The result showed that contrasted with treatment A ,the net photosynthetic （Pn） of B was the greatest,and production can achieve high yield; the growth of cassava was blocked in the treatment C; and can＇t ensure the normal growth situation in the treatment D. Moderate drought was beneficial to the formation of cassava variety Xinxuan 048 production

关 键 词：木薯 水分胁迫 生理指标 产量效应 

分 类 号：S533[农业科学—作物学]