氟磺胺草醚对大豆根瘤固氮酶活性及光合速率的影响  

Effect of Fomesafen on Nitrogenase Activity and Net Photosynthesis Rate in Soybean

作　　者：丁伟[1] 杨隆华[1] 程茁[2] 戴航宇[2] 

机构地区：[1]东北农业大学农学院大豆生物学省部共建重点实验室,黑龙江哈尔滨150030 [2]东北农业大学资源与环境学院,黑龙江哈尔滨150030

出　　处：《作物杂志》2010年第4期81-84,共4页Crops

基　　金：转基因生物新品种培育重大专项(项目编号:2009ZX08011-023B);黑龙江省青年科学基金项目(项目编号:QC07C45);哈尔滨市人才专项基金(项目编号:2007RFQXN012)

摘　　要：采用田间试验的方法研究了氟磺胺草醚对大豆根瘤固氮酶活性和叶片光合速率的影响。结果表明,在喷药后的38d内,氟磺胺草醚263g/hm2和525g/hm2施药一次对光合速率的抑制率分别为:3.72%～18.164%和8.13%～23.41%,对固氮酶活性的抑制率分别为:33.93%～73.97%和44.44%～79.43%,且第38天对根瘤固氮酶活性的抑制率最高。氟磺胺草醚263+263g/hm2和525+525g/hm2施药两次对光合速率的抑制率分别为:5.07%～42.574%和7.30%～44.50%,对固氮酶活性抑制率分别为:14.66%～65.77%和22.08%～70.96%,第23天对固氮酶活性抑制率最高。A field experiment was used to study effect of fomesafen on nodule nitrogenase activity and net photosynthesis rate in soybean.The results showed at the fomesafen concentration of 263 ga.i./hm^2 and 525 ga.i./hm^2 during 38 day after treatment（DAT）,the reduction of net photosynthesis rate was 3.72% to 18.164% and 8.13% to 23.41%,nitrogenase reduction was 33.93% to 73.97% and 44.44% to 79.43%,respectively.The highest reduction of nitrogenase was at 38 DAT.At the fomesafen of 263＋263 ga.i./hm^2 and 525＋525 ga.i./hm^2 during 38 DAT the reduction of net photosynthesis rate was 5.07% to 42.574% and 7.30% to 44.50%,nitrogenase reduction was 14.66% to 65.77% and 22.08% to 70.96%,respectively,and the highest reduction of nitrogenase was at 23 DAT.

关 键 词：大豆 氟磺胺草醚 根瘤固氮酶活性 光合速率 

分 类 号：S565.1[农业科学—作物学]