调亏灌溉对超级稻‘深两优5814’孕穗期根系生长的影响  

Effect of Regulated Deficit Irrigation on Root Growth of Super Rice 'Shenliangyou 5814' at Booting Stage

作　　者：阮三桂 姚帮松[1] 肖卫华[1] 张文萍[1] 谢立钧 廖健程 丁鑫[1] Ruan Sangui Yao Bangsong Xiao Weihua Zhang Wenping Xie Lijun Liao Jiancheng Ding Xing(Engineering College, Hunan Agricultural University, Changsha 410128)

机构地区：[1]湖南农业大学工学院,长沙410128

出　　处：《中国农学通报》2017年第9期7-11,共5页Chinese Agricultural Science Bulletin

基　　金：国家自然科学基金项目"增氧灌溉条件下作物水肥高效利用机理研究"(31272248);国际科技合作项目"东江湖外源污染阻控关键技术研究"(2013DFG91190)

摘　　要：为探究调亏灌溉对超级稻孕穗期根系生长的影响。采用盆栽试验方法,透光通风大棚内栽种超级稻。土壤水分湿度仪测定土壤水分含量,根据土壤水分含量对超级稻孕穗期进行不同程度的调亏灌溉处理。调亏程度分别以田间持水量的80%~70%、70%~60%、60%~50%,编号为A、B、C三组,对照组CK为淹水灌溉。调亏灌溉处理促进超级稻孕穗期根系生长,使根冠比显著高于充分灌溉。对不同处理组的根系活力进行测定,调亏灌溉处理组要高于充分灌溉组,其中B处理组活性最强。根系扫描分析结果显示A和B处理组各个根系特征指标要大于C处理组,同时,3个处理组均大于CK处理组。超级稻孕穗期调亏处理可有效减少灌溉水量,水分亏缺为田间持水量的60%至70%时,对超级稻根系生长最佳。To explore the effect of regulated deficit irrigation on root growth of super rice at the booting stage, apot experiment was performed on super rice in a translucent and ventilated greenhouse. The soil moisturecontents were measured by using a soil moisture meter, different degrees of regulated deficit irrigationtreatments were conducted on super rice at the booting stage based on soil moisture. The degrees of regulateddeficit were named as group A, B and C based on the rates of field moisture capacity, respectively at 80%-70%, 70%-60% and 60%-50%, and the control group CK was flood irrigation. Regulated deficit irrigationfacilitated the root growth of super rice at the booting stage, enabling the root-shoot ratio to be significantlyhigher than that of full irrigation. A measurement of root activity in different treatment groups indicated thatroot activities under regulated deficit irrigation treatments were significantly higher than those of the fullirrigation group, and group B showed the highest activity. The results of root scanning analysis indicated thatroot characteristic indicators of group A and B were higher than those of group C, and all indicators of the threegroups were higher than those of CK. The regulated deficit treatment on super rice at the booting stage was ableto reduce the volume of water for irrigation effectively, and it could achieve the optimal effects on root growthwhen water deficit was 60%-70% of the field moisture capacity.

关 键 词：调亏灌溉 超级稻 孕穗期 根系活力 根冠比 

分 类 号：S275.9[农业科学—农业水土工程]