小麦蚕豆间作对根际土壤氮转化微生物的影响

通过田间小区试验,采用磷脂脂肪酸(PLFA)、实时荧光定量PCR研究了小麦蚕豆间作不同生育期对根际土壤微生物群落的变化、氨氧化细菌(AOB)、氨氧化古菌(AOA)以及反硝化细菌中亚硝酸还原酶(nir K)、一氧化氮还原酶(nor B)和氧化亚氮还原酶(nos Z)基因拷贝数以及土壤酶活性和土壤硝态氮、铵态氮含量的影响。结果表明:与单作相比,小麦蚕豆间作显著提高了根际土壤中总的PLFAs生物量、细菌、真菌、放线菌和好氧菌的生物量。土壤样品中的amo A基因拷贝数在105106范围内AOB的amo A基因数量高于AOA。在不同的生育期,根际土壤中nir K的基因拷贝数都是间作高于单作;在拔节期,间...

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Published in农业资源与环境学报 Vol. 33; no. 5; pp. 482 - 490
Main Author 唐艳芬 续勇波 郑毅 雷宝坤
Format Journal Article
LanguageChinese
Published 农业农村部环境保护科研监测所 10.09.2016
中国农业生态环境保护协会
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ISSN2095-6819
2095-6819

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Abstract 通过田间小区试验,采用磷脂脂肪酸(PLFA)、实时荧光定量PCR研究了小麦蚕豆间作不同生育期对根际土壤微生物群落的变化、氨氧化细菌(AOB)、氨氧化古菌(AOA)以及反硝化细菌中亚硝酸还原酶(nir K)、一氧化氮还原酶(nor B)和氧化亚氮还原酶(nos Z)基因拷贝数以及土壤酶活性和土壤硝态氮、铵态氮含量的影响。结果表明:与单作相比,小麦蚕豆间作显著提高了根际土壤中总的PLFAs生物量、细菌、真菌、放线菌和好氧菌的生物量。土壤样品中的amo A基因拷贝数在105106范围内AOB的amo A基因数量高于AOA。在不同的生育期,根际土壤中nir K的基因拷贝数都是间作高于单作;在拔节期,间作蚕豆的nor B基因显著高于其他种植模式(P〈0.05);在拔节期、抽穗期,nos Z基因均是间作显著高于单作(P〈0.05),并随着生育期呈现降低的趋势。间作降低了根际土壤NO-3-N的含量,提高了NH+4-N的含量(P〈0.05)。说明小麦蚕豆间作后改变了根际土壤的微环境,使得土壤微生物群落结构发生改变,这种改变在一定程度上能够对土壤氮素的有效保蓄和供应、同时防止氮素损失和污染起到积极作用,为间作增产提供了氮素营养保障。
AbstractList 通过田间小区试验,采用磷脂脂肪酸(PLFA)、实时荧光定量PCR研究了小麦蚕豆间作不同生育期对根际土壤微生物群落的变化、氨氧化细菌(AOB)、氨氧化古菌(AOA)以及反硝化细菌中亚硝酸还原酶(nirK)、一氧化氮还原酶(norB)和氧化亚氮还原酶(nosZ)基因拷贝数以及土壤酶活性和土壤硝态氮、铵态氮含量的影响。结果表明:与单作相比,小麦蚕豆间作显著提高了根际土壤中总的PLFAs生物量、细菌、真菌、放线菌和好氧菌的生物量。土壤样品中的amoA基因拷贝数在105~106范围内AOB的amoA基因数量高于AOA。在不同的生育期,根际土壤中nirK的基因拷贝数都是间作高于单作;在拔节期,间作蚕豆的norB基因显著高于其他种植模式(P<0.05);在拔节期、抽穗期,nosZ基因均是间作显著高于单作(P<0.05),并随着生育期呈现降低的趋势。间作降低了根际土壤NO3--N的含量,提高了NH4+-N的含量(P<0.05)。说明小麦蚕豆间作后改变了根际土壤的微环境,使得土壤微生物群落结构发生改变,这种改变在一定程度上能够对土壤氮素的有效保蓄和供应、同时防止氮素损失和污染起到积极作用,为间作增产提供了氮素营养保障。
通过田间小区试验,采用磷脂脂肪酸(PLFA)、实时荧光定量PCR研究了小麦蚕豆间作不同生育期对根际土壤微生物群落的变化、氨氧化细菌(AOB)、氨氧化古菌(AOA)以及反硝化细菌中亚硝酸还原酶(nir K)、一氧化氮还原酶(nor B)和氧化亚氮还原酶(nos Z)基因拷贝数以及土壤酶活性和土壤硝态氮、铵态氮含量的影响。结果表明:与单作相比,小麦蚕豆间作显著提高了根际土壤中总的PLFAs生物量、细菌、真菌、放线菌和好氧菌的生物量。土壤样品中的amo A基因拷贝数在105106范围内AOB的amo A基因数量高于AOA。在不同的生育期,根际土壤中nir K的基因拷贝数都是间作高于单作;在拔节期,间作蚕豆的nor B基因显著高于其他种植模式(P〈0.05);在拔节期、抽穗期,nos Z基因均是间作显著高于单作(P〈0.05),并随着生育期呈现降低的趋势。间作降低了根际土壤NO-3-N的含量,提高了NH+4-N的含量(P〈0.05)。说明小麦蚕豆间作后改变了根际土壤的微环境,使得土壤微生物群落结构发生改变,这种改变在一定程度上能够对土壤氮素的有效保蓄和供应、同时防止氮素损失和污染起到积极作用,为间作增产提供了氮素营养保障。
Author 唐艳芬 续勇波 郑毅 雷宝坤
AuthorAffiliation 云南农业大学资源与环境学院,云南昆明650201 云南农业大学烟草学院,云南昆明650201 西南林业大学,云南昆明650224 云南省农业科学院农业环境资源研究所,云南昆明650200
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磷脂脂肪酸(PLFA)
间作
反硝化基因
荧光定量PCR
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intercropping; phospholipid fatty acids(PLFA); quantitative real-time PC R; amoA genes; denitrifying genes
Soil microorganism is one of the key factors that affects soil ecological activity. It is an important symbol of soil health, and the soil nitrogen cycle is closely related to the microorganisms. The relationship between nitrogen and microorganisms under the intercropping is im- portant for the farmland ecosystem. In this paper, phospholipid fatty acids (PLFA) analysis was used to determine soil microbial communi- ties, e.g., biomasses of anaerobic bacteria, aerobic bacteria, bacteria, fungi and actinobacteria. The abundance of nitrifying genes (AOB, AOA) and three denitrifying genes(nirK, norB, nosZ) were measured using real-time quantitative polymerase chain reaction. The enzymes, nitrate and ammonium concentrations were measured using conventional methods. The results showed that along with the growth period, the TPLFAs (total phospholipid fatty acids) increased and the bacterias, fungus, acti
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Snippet 通过田间小区试验,采用磷脂脂肪酸(PLFA)、实时荧光定量PCR研究了小麦蚕豆间作不同生育期对根际土壤微生物群落的变化、氨氧化细菌(AOB)、氨氧化古菌(AOA)以及反硝化细菌...
通过田间小区试验,采用磷脂脂肪酸(PLFA)、实时荧光定量PCR研究了小麦蚕豆间作不同生育期对根际土壤微生物群落的变化、氨氧化细菌(AOB)、氨氧化古菌(AOA)以及反硝化细...
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SubjectTerms amo
A基因
反硝化基因
磷脂脂肪酸(PLFA)
荧光定量PCR
间作
Title 小麦蚕豆间作对根际土壤氮转化微生物的影响
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