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	Provedor de dados Rev. Bras. Ciênc. Solo (2) Autor Bian,Zhengfu (2) Lei,Shaogang (2) Xiong,Jibing (2) Yang,Dejun (2) Zhang,Kefeng (2) Palavra-chave Agro-hydrological model (1) FEM (1) Friability (1) Hard-setting (1) Root length distribution (1) S index (1) Soil water content (1) Soil water retention curve (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2017 (1) 2015 (1) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Modeling Root Growth, Crop Growth and N Uptake of Winter Wheat Based on SWMS_2D: Model and Validation Rev. Bras. Ciênc. Solo Yang,Dejun; Bian,Zhengfu; Zhang,Kefeng; Xiong,Jibing; Lei,Shaogang. ABSTRACT Simulations for root growth, crop growth, and N uptake in agro-hydrological models are of significant concern to researchers. SWMS_2D is one of the most widely used physical hydrologically related models. This model solves equations that govern soil-water movement by the finite element method, and has a public access source code. Incorporating key agricultural components into the SWMS_2D model is of practical importance, especially for modeling some critical cereal crops such as winter wheat. We added root growth, crop growth, and N uptake modules into SWMS_2D. The root growth model had two sub-models, one for root penetration and the other for root length distribution. The crop growth model used was adapted from EU-ROTATE_N, linked to the N... Tipo: Info:eu-repo/semantics/article Palavras-chave: Agro-hydrological model; FEM; Root length distribution; Soil water content. Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832017000100520 Quantitative Assessment of Soil Physical Quality in Northern China Based on S-theory Rev. Bras. Ciênc. Solo Yang,Dejun; Bian,Zhengfu; Zhang,Kefeng; Xiong,Jibing; Lei,Shaogang. ABSTRACT Quantitative assessment of soil physical quality is of great importance for eco-environmental pollution and soil quality studies. In this paper, based on the S-theory, data from 16 collection sites in the Haihe River Basin in northern China were used, and the effects of soil particle size distribution and bulk density on three important indices of theS-theory were investigated on a regional scale. The relationships between unsaturated hydraulic conductivityKi at the inflection point and S values (S/hi) were also studied using two different types of fitting equations. The results showed that the polynomial equation was better than the linear equation for describing the relationships between -log Ki and -logS, and -log Kiand -log (S/hi)2; and clay... Tipo: Info:eu-repo/semantics/article Palavras-chave: Friability; Hard-setting; S index; Soil water retention curve. Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832015000501311 Registros recuperados: 2 Primeira ... 1 ... Última

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