草原与草坪2025，Vol.45Issue(1)：15-24,10.DOI:10.13817/j.cnki.cyycp.2025.01.003
腐熟牛粪对紫花苜蓿根瘤的促生效应
Effect of decomposed cow manure on growth of alfalfa root nodules
摘要
Abstract
[Objective]The growth-promoting ability of alfalfa was studied by adding different amount of decom-posed cow dung,in order to reveal the mechanism of increasing symbiotic nodulation rate and nitrogen fixation effi-ciency of alfalfa.[Method]Gannong No.9 of alfalfa was used as experimental material and treated by adding decom-posed cow dung(different amount).The biological indexes and the related indexes of root nodules were determined and compared.It was found that 129 g cow dung/basin(2.75 t/mu)was the best amount of manure for promoting growth.[Result]According to the experiment,the best amount of rotten cow dung was extracted and separated to ob-tain dung residue and extract,and pot experiment was carried out with the control and the best amount of rotten cow dung respectively,the differences of root nodule index and growth-promoting ability among the treatments showed that,the feces had the strongest growth-promoting ability to alfalfa nodules(P<0.05),effective nodule number(P<0.05),nodule weight(P<0.05),maximum nodule weight(P<0.05),infection number(P<0.05),infection zone length(P<0.05)).Canonical correspondence analysis(CCA)showed that 95.6%of the root nodule charac-teristics could be explained by nutrients from different treatments.The nutrient content in cow dung and feces had a positive effect on the formation of nodule characteristic index.Especially in faecal residue treatment,C/N was signifi-cantly positively correlated with the largest nodule weight(P<0.01),the total nodule number and the total nodule weight(P<0.05).[Conclusion]There was a significant positive correlation between the content of available P and the nodulation index including the number of root infection(P<0.05).关键词
紫花苜蓿/腐熟牛粪/碳氮比/根瘤菌/结瘤Key words
alfalfa/decomposed cow dung/rhizobium/nodulation/C/N ratio分类
农业科技引用本文复制引用
朱瑞芬,刘畅,冉启凡,马慧珍,范彦,师尚礼..腐熟牛粪对紫花苜蓿根瘤的促生效应[J].草原与草坪,2025,45(1):15-24,10.基金项目
重庆市科研院所绩效激励引导专项(22525J) （22525J）
重庆市畜牧科技研究与推广项目(21521) （21521）
