Sun, Bing

Wu, Jin

Xin, Guorong

Yang, Yujie

Yang, Zhongyi

English

University of Kentucky

University of Kentucky UKnowledge International Grassland Congress Proceedings 21st International Grassland Congress / 8th International Rangeland Congress The Effect of Mycorrhizal Fungi on Italian Ryegrass in Guangzhou Paddy Field Guorong Xin Sun Yat-sen University, China Bing Sun Sun Yat-sen University, China Yujie Yang Sun Yat-sen University, China Jin Wu Sun Yat-sen University, China Zhongyi Yang Sun Yat-sen University, China Follow this and additional works at: https://uknowledge.uky.edu/igc  Part of the Plant Sciences Commons, and the Soil Science Commons This document is available at https://uknowledge.uky.edu/igc/21/1-3/45 The 21st International Grassland Congress / 8th International Rangeland Congress took place in Hohhot, China from June 29 through July 5, 2008. Proceedings edited by Organizing Committee of 2008 IGC/IRC Conference Published by Guangdong People's Publishing House This Event is brought to you for free and open access by the Plant and Soil Sciences at UKnowledge. It has been accepted for inclusion in International Grassland Congress Proceedings by an authorized administrator of UKnowledge. For more information, please contact UKnowledge@lsv.uky.edu. 瞯 ]144　 瞯 　 Multifunctional Grasslands in a Changing World 　 Volume Ⅰ 　Grasslands/Rangelands Resources and Ecology ——— Ecology of Grasslands/RangelandsThe effect of mycorrhizal fungi on Italian ryegrass in Guangzhou paddy fieldX in Guo‐rong 倡 ,Sun Bing , Y ang Y u‐j ie , W u Jin , Y ang Zhong‐yiState Key L aboratory o f Biocontrol , School o f L i f e Science , Sun Y at‐sen ( Zhongshan) University , Guangz hou , 510275 ,China . 倡 Corresponding author , E‐mail : lssx gr＠ mail .sysu .edu .cnKey words :mycorrhizal fungi , Italian ryegrass , root colonization , phosphorus fertilizer , soil sterilizationIntroduction As a feed , Italian ryegrass ( Lolium multi f lorum ) has many advantages such as containing more crude protein .Moreover , Italian ryegrass winter cropping can promote the output of succeeding rice . This study evaluated the effect ofmycorrhizal fungi on the grow th of Italian ryegrass , as well as its performance at different rates of phosphorus fertilizer with orwithout soil sterilization .Materials and methods The pot experiment was conducted during the dry season ( November ２００５ February ２００６ ) w ith Italianryegrass ( Loliummu lti f lorum ) , in laterite soil from Guangzhou paddy field , China . A three‐factor experiment was designed :the plants were grown in different soil treatments as sterile ( S ) or non‐sterile ( NS ) , different inoculants as single inoculants( Glomus mosseae ,SI) , multiple inoculants ( Glomus caledonium ＋ Glomus caledonium ＋ Glomus versi f orme , MI) or non‐inoculants( NI) , and different concentration of phosphorus fertilizer as ０ mg / kg (CK) , ３０ mg / kg ( LP) , ６０ mg / kg ( MP) , １００mg/ kg ( HP) . Plants were harvested af ter ６７ days of grow th . Roots were assessed regarding root colonization according toPhillips and Hayman ( １９７０) with some modifications . The performance of Italian ryegrass was studied also .Results The plants inoculated with single fungus had higher root colonization compared with multiple fungus( p ＜ ０ .０５) , and theplants grown in sterile soil had higher root colonization than in non‐sterile soil( p ＜ ０ .０５ ) ( Figure １ ) .When inoculated plantswere compared to non‐inoculated plants , the mycorrhizal fungi had a positive effect on grow th of ryegrass ( p ＜ ０ .０５ ) ( Table１ ) . High P fertilizer improved grow th ( p ＜ ０ .０５ ) , but high levels of P negatively correlated with root colonization ( Figure １ ) .Figure 1 A M total colonz ation o f IRG in the pot culture ex periment .Table 1 Correlations between AM coloniz ation and grow th o f IRG ( Pearson Correlation , Sig .2 — tailed , N ＝ 80) .Root conolizationAbove － ground biomass ０ J.２６７ 倡Underground biomass ０ J.２８１ 倡Plant height ０ J.２８７ 倡 倡tillers ０ J.２２３ 倡倡 : p ＜ ０ .０５ , 倡 倡 : p ＜ ０ .０１ .Conclusions Ryegrass was more sensitive to single inoculants ( Glomus mosseae ) , but root colonization and mycorrhizaldependency was universally low , which probably is because ryegrass has well‐developed root systems which can uptakenutritions well without mycorrhiza . Plant biomass , height and the number of tillers strongly increased in the presence ofmycorrhiza . There seems to be potential to improve the plant grow th by inoculating with mycorrhiza . Nevertheless , it is stillessential to find the balance between P fertilizer and mycorrhizal fungus . Soil sterilization had a significant positive effect on theroot colonization and grow th parameters of plants , which possibly resulting from the absent competition of indigenous soilmicrobes .* 8 a a be C: 0 6 ab ..... be d +-' "' d N be ·s 0 .---< 0 4. 0 +-' ed 0 0 2 "" 0 ;;i :,; '" :,; '" ~ :,; '" :,; ~ '" '" '" '" '" '" ~ ~ '" :,; 'i' t 'i' ::i: 'i' ::i: 'i' ::i: t ::i: t ::i: t t 'i' 'j: 'j: ·o, "' 'j: "' "' "' "' 'j: "' "' 'j: 'j: "' "' "' "' "' 'j: + ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ "' 01 01 01 ~ ~ ~ ~ 01 ~ z z ~ 01 01 ~ z z 01 ~ 

The Effect of Mycorrhizal Fungi on Italian Ryegrass in Guangzhou Paddy Field

https://uknowledge.uky.edu/cgi/viewcontent.cgi?article=2323&amp;context=igc

The Effect of Mycorrhizal Fungi on Italian Ryegrass in Guangzhou Paddy Field

Abstract

Similar works

Full text

Available Versions

University of Kentucky