scholarly journals IRRIGAÇÃO POR GOTEJAMENTO SUBSUPERFICIAL EM CULTIVARES DE CANA-DE-AÇÚCAR IMPACTAM A AGREGAÇÃO DO SOLO?

Irriga ◽  
2021 ◽  
Vol 1 (3) ◽  
pp. 431-445
Author(s):  
Yasmin Reis Magalhães ◽  
Anderson Prates Coelho ◽  
Carolina Fernandes ◽  
Alexandre Barcellos Dalri

IRRIGAÇÃO POR GOTEJAMENTO SUBSUPERFICIAL EM CULTIVARES DE CANA-DE-AÇÚCAR IMPACTAM A AGREGAÇÃO DO SOLO?     YASMIN REIS MAGALHÃES1; ANDERSON PRATES COELHO2; CAROLINA FERNANDES1; ALEXANDRE BARCELLOS DALRI2   1 Departamento de Ciências da Produção Agrícola, Universidade Estadual Paulista (Unesp), Faculdade de Ciências Agrárias e Veterinárias, Via de Acesso Professor Paulo Donato Castellane, s/n Km 5, 14884-900, Jaboticabal, São Paulo, Brasil. [email protected]; [email protected] 2 Departamento de Engenharia e Ciências Exatas, Universidade Estadual Paulista (Unesp), Faculdade de Ciências Agrárias e Veterinárias, Via de Acesso Professor Paulo Donato Castellane, s/n Km 5, 14884-900, Jaboticabal, São Paulo, Brasil. [email protected]; [email protected]     1 RESUMO   Objetivou-se avaliar o efeito da irrigação por gotejamento subsuperficial em cultivares de cana-de-açúcar, contrastantes na responsividade à irrigação, na agregação de Latossolo argiloso. O experimento foi realizado em Latossolo Vermelho eutroférrico, de textura argilosa (587 g kg-1 de argila). Foram coletadas amostras deformadas de solo em vinte pontos em cada uma das quatro áreas de cana-de-açúcar avaliadas nas camadas 0,00-0,10 m e 0,10-0,20 m. As áreas correspondiam ao cultivo irrigado e não irrigado, das cultivares CTC 4 e IACSP93-3046. Foram determinados e calculados o índice de estabilidade dos agregados, diâmetro médio ponderado de agregados, fracionamento físico do carbono orgânico e as classes de agregados. Os dados foram submetidos à estatística descritiva e multivariada de fatores. De acordo com as correlações das variáveis, a agregação do solo foi dividida em dois processos, sendo o primeiro denominado de “Dimensão de agregados” e o segundo “Estabilidade de agregados”. Observou-se que a irrigação por gotejamento subsuperficial promove maior “Estabilidade de agregados” do solo em áreas cultivadas com cana-de-açúcar. Além disso, cultivares de cana-de-açúcar proporcionam diferenças na agregação do solo, sendo que a cultivar responsiva à irrigação IACSP93-3046 promove maior “Dimensão de agregados” do solo em relação a cultivar não responsiva CTC 4.   Palavras-chave: diâmetro médio ponderado de agregados, estabilidade de agregados, carbono orgânico, Latossolo.     MAGALHÃES, Y. R.; COELHO, A. P.; FERNANDES, C.; DALRI, A. B. DOES SUBSURFACE DRIP IRRIGATION IN SUGARCANE CULTIVARS IMPACT SOIL AGGREGATION?     2 ABSTRACT   The aim was to evaluate the effect of subsurface drip irrigation with sugarcane cultivars, contrasting in the responsiveness to irrigation, in the aggregation of Oxisol clayey. The experiment was conducted in a clayey Oxisol (587g kg-1 of clay). Deformed soil samples were collected at twenty points in each four areas of sugarcane evaluated in the layers 0.00-0.10 m and 0.10-0.20 m. The areas corresponded to the irrigated and non-irrigated cultivation of cultivars CTC 4 and IACSP93-3046. The aggregate stability index, weighted average diameter of aggregates, physical fractionation of organic carbon and aggregate classes were determined and calculated. The data were submitted to the descriptive and multivariate factor statistics. According to the correlations of the variables, soil aggregation was divided into two processes, the first being called “Aggregates dimension” and the second “Aggregates stability.” It was observed that subsurface drip irrigation promotes greater soil “Aggregate stability” in areas cultivated with sugarcane. Additionally, sugarcane cultivars provide differences in soil aggregation, and the cultivar responsive to irrigation IACSP93-3046 promotes a larger soil “Aggregates dimension” than the non-responsive cultivar CTC 4.   Keywords: weighted average diameter of aggregates, aggregate stability, organic carbon, Oxisol.

2002 ◽  
Vol 66 (1) ◽  
pp. 178 ◽  
Author(s):  
Thomas L. Thompson ◽  
Thomas A. Doerge ◽  
Ronald E. Godin

2000 ◽  
Vol 42 (1-2) ◽  
pp. 75-79 ◽  
Author(s):  
C. Campos ◽  
G. Oron ◽  
M. Salgot ◽  
L. Gillerman

A critical objective for any wastewater reuse programme is to minimise health and environmental hazard. When applying wastewater to soil–plant systems, it is to be noted that the passage of water through the soil considerably reduces the number of microorganisms carried by the reclaimed wastewater. Factors that affect survival include number and type of microorganisms, soil organic matter content, temperature, moisture, pH, rainfall, sunlight, protection provided by foliage and antagonism by soil microflora. The purpose of this work was to examine the behaviour of fecal pollution indicators in a soil irrigated with treated wastewater under onsurface and subsurface drip irrigation. The experiment was conducted in a vineyard located at a commercial farm near the City of Arad (Israel). Wastewater and soil samples were monitored during the irrigation period and examined for fecal coliforms, somatic and F+ coliphages and helminth eggs. Physico-chemical parameters were controlled in order to determine their relationship with removal of microorganisms. The results showed high reduction of the concentration of microorganisms when wastewater moves through the soil; and a good correlation between the reduction of fecal pollution indicators and moisture content, organic matter concentration and pH. The application of secondary treated domestic wastewater in this specific soil and under these irrigation systems affect the survival of microorganisms, thus reducing the health and environmental risk.


2019 ◽  
pp. 397-404
Author(s):  
J.V. Prado-Hernández ◽  
F.R. Hernández-Saucedo ◽  
M. Carrillo-García ◽  
J. Pineda-Pineda ◽  
A.H. Gutiérrez-Campos ◽  
...  

2011 ◽  
Vol 42 (22) ◽  
pp. 2778-2794 ◽  
Author(s):  
P. G. Hunt ◽  
K. C. Stone ◽  
T. A. Matheny ◽  
M. B. Vanotti ◽  
A. A. Szogi ◽  
...  

2009 ◽  
Vol 38 (4) ◽  
pp. 1749-1756 ◽  
Author(s):  
J. C. Burns ◽  
K. C. Stone ◽  
P. G. Hunt ◽  
M. B. Vanotti ◽  
K. B. Cantrell ◽  
...  

2002 ◽  
Vol 66 (1) ◽  
pp. 186-192 ◽  
Author(s):  
Thomas L. Thompson ◽  
Thomas A. Doerge ◽  
Ronald E. Godin

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