本文選題：青稞 + 根腐病��； 參考：《生態(tài)學(xué)報(bào)》2017年17期

【摘要】：選取甘肅省卓尼縣青稞種植區(qū)為研究地點(diǎn),調(diào)查青稞根腐病的發(fā)病情況,并分別采集其健康植株和發(fā)病株根際的土壤,對比分析其土壤微生物生物量(碳、氮、磷)、微生物數(shù)量(細(xì)菌、真菌、放線菌)以及過氧化氫酶、蔗糖酶、脲酶、堿性磷酸酶、纖維素酶5種酶活性。結(jié)果發(fā)現(xiàn),研究區(qū)10個(gè)采樣點(diǎn)均有青稞根腐病的發(fā)生,發(fā)病率在5%—20%之間,不同地點(diǎn)發(fā)病率不同。根腐病的發(fā)生,會(huì)顯著影響青稞根際微生物生物量,導(dǎo)致微生物生物量碳、氮、磷的含量發(fā)生變化,其中微生物生物量氮和磷含量整體降低,且不同采樣點(diǎn)微生物量不同。土壤微生物數(shù)量總體呈現(xiàn)細(xì)菌放線菌真菌的趨勢,但不同微生物對根腐病發(fā)病的響應(yīng)不同,細(xì)菌和放線菌數(shù)量因根腐病的發(fā)生而減少,真菌的數(shù)量則增多;不同采樣點(diǎn)土壤微生物數(shù)量不相同,細(xì)菌和真菌呈現(xiàn)區(qū)域性特征,放線菌的數(shù)量不呈現(xiàn)地域性。根腐病的發(fā)生還造成土壤酶活性的改變,其中蔗糖酶、脲酶、磷酸酶的含量因根腐病的發(fā)生而降低,而纖維素酶則升高,過氧化氫酶的變化沒有規(guī)律�？偠灾�,根腐病的發(fā)生會(huì)使青稞根際土壤微生物組成發(fā)生改變,碳、氮、磷等物質(zhì)代謝受到抑制,而能量代謝發(fā)生紊亂。因此,研究和防治青稞根腐病就必須重視土壤微生物及土壤酶的作用。
[Abstract]:In order to investigate the incidence of root rot of highland barley in Zhuoni County of Gansu Province, and collect the soil of healthy plants and rhizosphere of infected plants, the soil microbial biomass (carbon, nitrogen) was compared and analyzed. The activities of catalase, sucrase, urease, alkaline phosphatase and cellulase were investigated. The results showed that the root rot of highland barley was found in all 10 sampling sites in the study area, and the incidence was between 5% and 20%, and the incidence was different in different locations. The occurrence of root rot will significantly affect the rhizosphere microbial biomass of highland barley, resulting in the changes of microbial biomass carbon, nitrogen and phosphorus content, in which the microbial biomass nitrogen and phosphorus content decreased, and the microbial biomass of different sampling points were different. The number of soil microbes showed the trend of bacterial actinomycetes, but the response of different microbes to root rot was different. The number of bacteria and actinomycetes decreased with the occurrence of root rot, but the number of fungi increased. The number of soil microbes in different sampling sites is different, bacteria and fungi show regional characteristics, and the quantity of actinomycetes is not regional. The occurrence of root rot also caused the change of soil enzyme activity, in which the contents of sucrase, urease and phosphatase decreased with the occurrence of root rot, but the cellulase increased, but the change of catalase was not regular. In a word the root rot disease will change the microbial composition of highland barley rhizosphere soil and inhibit the metabolism of carbon nitrogen and phosphorus while the energy metabolism will be disturbed. Therefore, to study and control the root rot of highland barley, we must pay attention to the role of soil microbes and soil enzymes.
【作者單位】： 甘肅農(nóng)業(yè)大學(xué)草業(yè)學(xué)院;甘肅省農(nóng)業(yè)科學(xué)院;
【基金】：國家公益性行業(yè)(農(nóng)業(yè))計(jì)劃項(xiàng)目(201503112)
【分類號】：S154;S435.123

【相似文獻(xiàn)】

相關(guān)期刊論文 前5條

1 暴增海 ,馬桂珍 ,張翠玲;兩種苯氧羧酸類除草劑對小麥根腐病菌的影響[J];承德民族職業(yè)技術(shù)學(xué)院學(xué)報(bào);2001年04期

2 秦全旺;郭金有;;八十棵樹患根腐 賽眾28顯神威[J];西北園藝(果樹專刊);2008年03期

3 孫文姬,簡桂良,劉秀蘭,范朝雙;山東菏澤地區(qū)牡丹根腐病病原真菌的分離鑒定[J];植物病理學(xué)報(bào);1999年02期

4 李紅葉，曹若彬，，徐德勝，胡毅敏，任如紅;楊梅根腐病病菌營養(yǎng)和分泌果膠酶及纖維素酶的特性[J];浙江農(nóng)業(yè)大學(xué)學(xué)報(bào);1996年02期

5 權(quán)立宏;印度非衰老高粱對根腐和莖腐病原菌的品種反應(yīng)[J];國外農(nóng)學(xué)-雜糧作物;1995年03期

相關(guān)會(huì)議論文 前1條

1 高曉梅;陳順;李莉;劉曉輝;張巖;;韭菜根腐病病原菌的分離鑒定及根際土壤真菌區(qū)系研究[A];2008年中國微生物學(xué)會(huì)學(xué)術(shù)年會(huì)論文摘要集[C];2008年

相關(guān)碩士學(xué)位論文 前1條

1 燕

本文編號：1856973