硝态氮对大豆根瘤性状的影响  

Effect of Nitrate Nitrogen on Nodulation Characters of Soybean(Glycine max L.)

作　　者：朱巍巍[1,2] 韩晓增[2] 芦思佳[1,2] 许修宏[1] 

机构地区：[1]东北农业大学资源与环境学院,黑龙江哈尔滨150030 [2]中国科学院东北地理与农业生态研究所,黑龙江哈尔滨150081

出　　处：《大豆科学》2010年第5期845-847,共3页Soybean Science

基　　金：国家重点基础研究发展计划资助项目(2005CB121106);国家科技支撑计划资助项目(2006BAD21B01;2006BAD05B05)

摘　　要：选取黑龙江省第三积温带主栽大豆品种黑农35为材料,采用水培方法,在大豆移栽后28、35、42、49 d取样,对根瘤的物理性状(根瘤干重、根瘤数和单个根瘤干重)进行动态分析,研究了硝态氮对大豆根瘤性状的影响。结果表明:从移栽后第28天开始生物固氮处理根瘤数明显增加,而施用硝态氮根瘤数基本不变,硝态氮抑制了大豆根瘤形成,而单个根瘤干重增加较大。从根瘤密度来看,硝态氮降低大豆根瘤在根系上分配密度,在第28天生物固氮处理每个根上结瘤124.84个,而施用硝态氮每个根上结瘤22.84个。Heinong 35, the main cultivation soybean variety of the third accumulated temperature area in Heilongjiang, was selected as material. The biological nitrogen fixation as well as extra application of nitrate nitrogen （Ca（ NO3 ）2 ） treatments were set to study the effects of nitrate nitrogen on nodule characters by analyzing nodule physical characters such as nodule dry weight, nodule numbers and the dry weight of per nodule at the 28th, 35th , 42th , 49th days after transplanting. The result showed that nodule numbers increased obviously under biological nitrogen fixation treatment from the 28th day after transplan- ting. However, the nodule numbers changed little after extra application of nitrate nitrogen treatment. Furthermore, that extra application of nitrate nitrogen treatment restrained the forming of soybean nodule, whereas the dry weight of per nodule increased significantly. Moreover, extra application of nitrate nitrogen treatment decreased the distribution density of nodule in the root system, and the nodule numbers of per root were 124.84 after biological nitrogen fixation treatment and it was 22.84 when treated with extra nitrate nitrogen.

关 键 词：硝态氮 根瘤 大豆 

分 类 号：S565.1[农业科学—作物学]