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	Provedor de dados Anais da ABC (AABC) (1) Bragantia (1) Autor LIU,JUN (1) WANG,CONGYAN (1) ZHOU,JIAWEI (1) Zeng,Xiaoyang (1) Palavra-chave N deposition (2) Allelopathic potential (1) Amaranthus retroflexus (1) C cycling (1) High-altitude region (1) Invasive plant (1) Microbial activity (1) Seed germination (1) Soil properties (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2017 (2) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última N deposition affects allelopathic potential of Amaranthus retroflexus with different distribution regions Anais da ABC (AABC) WANG,CONGYAN; LIU,JUN; ZHOU,JIAWEI. ABSTRACT This study aims to determine the allelopathic potential of Amaranthus retroflexus (Ar) with different climatic zones on seed germination and growth of A. tricolor (At) treated with a gradient N addition. Ar leaf extracts only displayed significantly allelopathic potential on the underground growth of Ar but not the aboveground growth of At. The allelopathic potential of Ar leaf extracts on root length of At were enhanced under N addition and there may be a N-concentration-dependent relationship. The effects of the extracts of Ar leaves that collected from Zhenjiang on seed germination and growth of At may be higher than that collected from Jinan especially on root length of At under medium N addition. This reason may be the contained higher... Tipo: Info:eu-repo/semantics/article Palavras-chave: Allelopathic potential; Invasive plant; N deposition; Seed germination; Amaranthus retroflexus. Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000300919 Differential response of microbial respiration to supplied nitrogen forms in 3 contrasting alpine meadow soils on the Tibetan Plateau Bragantia Zeng,Xiaoyang. ABSTRACT An incubation experiment was conducted to examine the effects of nitrogen (N) applications in different forms (NH4NO3, NH4Cl, and KNO3) on microbial respiration considering 3 different alpine meadow soils (C poor soil, pH = 8.1, 1.6% C; C moderate soil, pH = 6.0, 5.0% C; C rich soil, pH = 7.1, 7.4% C) in the Tibetan Plateau. The addition of NH4NO3 and NH4Cl increased the microbial respiration in C poor soil, but KNO3 had no effect. The inorganic N forms had no effects on C rich soil, but decreased microbial respiration in C moderate soil. Soil microbial respiration levels across the different types were ordered as follows: C poor soil < C rich soil < C moderate soil, regardless of N addition. These results suggest that the effect of N on... Tipo: Info:eu-repo/semantics/article Palavras-chave: C cycling; Microbial activity; N deposition; Soil properties; High-altitude region. Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052017000300416 Registros recuperados: 2 Primeira ... 1 ... Última

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