SOIL AGGREGATION IN A CROP-LIVESTOCK INTEGRATION SYSTEM UNDER NO-TILLAGE

被引：25
|
作者：
de Souza, Edicarlos Damacena [1 ]
Gigante de Andrade Costa, Sergio Ely Valadao
Anghinoni, Ibanor [2 ]
de Faccio Carvalho, Paulo Cesar [3 ]
Ferreira de Oliveira, Eric Victor [4 ]
Martins, Amanda Posselt
Cao, Eduardo
Andrighetti, Marcelo
机构：
[1] Univ Fed Goias, Dept Soil Sci, Setor Ind, Jatai, Go, Brazil
[2] Univ Fed Rio Grande do Sul, Dept Soil Sci, CNPq, BR-90046900 Porto Alegre, RS, Brazil
[3] Univ Fed Rio Grande do Sul, Forage & Agrometeorol Dept, CNPq, BR-90046900 Porto Alegre, RS, Brazil
[4] Univ Fed Vicosa, Dept Soil & Plant Nutr, Vicosa, MG, Brazil
来源：
REVISTA BRASILEIRA DE CIENCIA DO SOLO | 2010年 / 34卷 / 04期
关键词：
black oat; Italian ryegrass; mean weighted diameter; soil structure; ORGANIC-MATTER; STABILITY;
D O I：
10.1590/S0100-06832010000400033
中图分类号：
S15 [土壤学];
学科分类号：
0903 ; 090301 ;
摘要：
Grazing intensities can influence soil aggregation, which can be temporarily and permanently affected. The objective of this study was to evaluate the aggregate stability in water at the end of a soybean cycle and during pasture development in a crop-livestock integration system under no-tillage and grazing intensities. The experiment was initiated in 2001, in a dystrophic Red Latosol, after soybean harvest. Treatments consisted of pasture (black oat + Italian ryegrass) at heights of 10,20 and 40 cm, grazed by young cattle, and a control (no grazing), followed by soybean cultivation, in a randomized block design. Soil samples were collected at the end of the soybean cycle (May/2007), during animal grazing (September/2007) and at the end of the grazing cycle (November/2007). The grazing period influences aggregate distribution, since in the September sampling (0-5 cm layer), there was a higher proportion of aggregates > 4.76 mm at all grazing intensities. Soil aggregation is higher in no-tillage crop-livestock integration systems in grazed than in ungrazed areas.
引用
收藏
页码：1365 / 1374
页数：10
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