5种土壤处理用除草剂对紫花苜蓿-根瘤菌共生固氮的影响  

INFLUENCE OF FIVE HERBICIDES ON RHIZOBIUM-ALFALFA SYMBIOTIC NITROGEN-FIXATION

作　　者：王利平[1] 王金信[1] 孙艾蕊[1] 鲁梅[1] 刘淑华[1] 

机构地区：[1]山东农业大学植物保护学院,山东泰安271018

出　　处：《山东农业大学学报（自然科学版）》2007年第1期39-42,共4页Journal of Shandong Agricultural University：Natural Science Edition

摘　　要：温室内测定了5种土壤处理除草剂:咪唑乙烟酸,异恶草酮,乙草胺,仲丁灵和氟乐灵对紫花苜蓿鲜重、干重、结瘤和总含氮量的抑制作用。其中以咪唑乙烟酸和异恶草酮的抑制作用为最强,乙草胺和仲丁灵的抑制作用次之,氟乐灵抑制作用最小。咪唑乙烟酸在用量为33．8a．i．g/hm^2时对紫花苜蓿的鲜重抑制率和干重抑制率分别为67．2%和65．3%,氟乐灵在用量为450a．i．g/hm^2时对紫花苜蓿的鲜重抑制率和干重抑制率分别为33．0%和33．3%;与对照植株的结瘤率和总含氮量分别为90．1%和4．2%相比,咪唑乙烟酸用量为33．8 a．i．g/hm^2处理时,紫花苜蓿结瘤率和含氮量分别为为33．1%和2．3%,氟乐灵为450 a．i．g/hm^2处理时,紫花苜蓿结瘤率和含氮量分别为76．0%和3．1%。The inhibitory effects of 5 herbicides ： imazethapyr, clomazone, acetochlor, butralin and trifluralin on rhizobium-alfalfa symbiotic nitrogen-fixation were studied in greenhouse. The results revealed that： imazethapyr and clomazone had the strongest inhibitory effects, trifluralin had the lest inhibitory effects. At the dosage of 33.8 a. i. g/hm^2, imazethapyr reduced respectively fresh weight and dry weight by 67.2% and 65. 3% , trifluralin, at the dosage of 450 a. i. g/hm^2, reduced respectively fresh weight and dry weight by 33.0% and 33.3% ; nodulation rate and total nitrogen content of alfalfa without herbicides were respectively 90.1% and 4.2% , at the dosage of 33.8 a. i. g/hm^2, imazethapyr reduced respectively nodulation rate. and total nitrogen content by 33.1% and 2.3%, while trifluralin, at the dosage of 450 a. i. g/hm^2, reduced respectively nodulation rate and total nitrogen content by 76.0% and 3.1%.

关 键 词：除草剂 紫花苜蓿 根瘤菌 共生固氮 

分 类 号：S662.3[农业科学—果树学]