Ocurrencia y distribución de Fusarium spp. en suelos de cultivo de trigo bajo siembra directa
| Autor: | L.B. Silvestro, Maria Virginia Moreno, Horacio José Forján, Angélica Margarita Arambarri, María I. Dinolfo, L. Manso, Sebastian Alberto Stenglein |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2013 |
| Předmět: |
Fusarium
Soil test soil depth diversidad de especies suelos cultivados Crop lcsh:Agriculture No-till farming crop rotation Crop rotation Agronomía reproducción y protección de plantas Ciencias Naturales Species diversity cultivated soil rotación de cultivos profundidad del suelo biology species diversity FUSARIUM lcsh:S biology.organism_classification Cultivated soil SOIL Agronomy CIENCIAS AGRÍCOLAS Soil depth purl.org/becyt/ford/4.1 [https] Soil water Species richness Agricultura Silvicultura y Pesca Agronomy and Crop Science purl.org/becyt/ford/4 [https] ZERO TILLAGE |
| Zdroj: | SEDICI (UNLP) Universidad Nacional de La Plata instacron:UNLP Spanish Journal of Agricultural Research, Vol 11, Iss 1, Pp 72-79 (2013) Spanish Journal of Agricultural Research; Vol. 11 No. 1 (2013); 72-79 Spanish Journal of Agricultural Research; Vol. 11 Núm. 1 (2013); 72-79 SJAR. Spanish Journal of Agricultural Research instname CONICET Digital (CONICET) Consejo Nacional de Investigaciones Científicas y Técnicas instacron:CONICET |
| ISSN: | 2171-9292 |
| Popis: | The presence of Fusarium species in cultivated soils is commonly associated with plant debris and plant roots. Fusarium species are also soil saprophytes. The aim of this study was to examine the occurrence and distribution of soil Fusarium spp. at different soil depths in a zero tillage system after the wheat was harvested. Soil samples were obtained at three depths (0-5 cm, 5-10 cm and 10-20 cm) from five crop rotations: I, conservationist agriculture (wheatsorghum- soybean); II, mixed agriculture/livestock with pastures, without using winter or summer forages (wheatsorghum- soybean-canola-pastures); III, winter agriculture in depth limited soils (wheat-canola-barley-late soybean); IV, mixed with annual forage (wheat-oat/Vicia-sunflower); V, intensive agriculture (wheat-barley-canola, with alternation of soybean or late soybean). One hundred twenty two isolates of Fusarium were obtained and identified as F. equiseti, F. merismoides, F. oxysporum, F. scirpi and F. solani. The most prevalent species was F. oxysporum, which was observed in all sequences and depths. The Tukey's test showed that the relative frequency of F. oxysporum under intensive agricultural management was higher than in mixed traditional ones. The first 5 cm of soil showed statistically significant differences (p = 0.05) with respect to 5-10 cm and 10-20 cm depths. The ANOVA test for the relative frequency of the other species as F. equiseti, F. merismoides, F. scirpi and F. solani, did not show statistically significant differences (p ≤ 0.05). We did not find significant differences (p ≤ 0.05) in the effect of crop rotations and depth on Shannon, Simpson indexes and species richness. Therefore we conclude that the different sequences and the sampling depth did not affect the alpha diversity of Fusarium community in this system. Instituto de Botánica "Dr. Carlos Spegazzini" |
| Databáze: | OpenAIRE |
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