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Journal of Agricultural Science and Technology، جلد ۱۹، شماره ۱، صفحات ۲۴۵-۲۵۷
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عنوان انگلیسی Mollisol: Biological Characterization under Zero Tillage with Different Crops Sequences
چکیده انگلیسی مقاله Zero tillage practices have a direct effect on soil microbial communities modifying soil productivity and sustainability. The crop sequences used can change the aforementioned properties, too. In this study, we evaluated the effect of crop sequences under zero tillage management on soil biological and chemical properties including vertical distribution of soil organic carbon, soil basal respiration, and dehydrogenase, acid phosphatase, and urease activity along a seasonal year and at different soil depths. The sequences included in this study were: (I) Single crop per year (sunflower-wheat-sorghum-soybean); (II) Mixed agriculture/livestock with pastures, without using winter or summer forages (wheat sorghum/soybean-canola-pasture); (III) Winter management (wheat-canola-barley-late soybean); (IV) Mixed with annual feed crop (wheat-oat/Vicia sativa- soybean or sunflower), and (V) Intensive management (wheat-barley-canola, with alternation of soybean or late soybean). Soil organic carbon decreased with increasing depth, depending on sequences (Pseq×depth= 0.0173). Soil basal respiration was higher in the 0-5 cm layer than in the 10-20 cm layer of the topsoil irrespective of the crop sequences (Pdepth= 0.0062). Dehydrogenase, acid phosphatase and urease activity were affected by crop sequences, sampling season, and depth. Mixed sequences (sequences II and IV), including perennial pastures or annual feed crop could favor dehydrogenase and phosphatase activity. Sequences with cover crops (sequences II and IV) could favor microbial activity and, therefore, improve soil quality.
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نویسندگان مقاله l b silvestro | l b
laboratory of functional biology and biotechnology biolab-inbiotec-conicet-cic , national university of the center of the province of buenos aires, argentina.

f biganzoli |
department of quantitative methods and information systems, faculty of agronomy, university of buenos aires, argentina.

h forjn |
barrow-inta experimental station, tres arroyos, province of buenos aires, argentina.

a albanesi |
chair in microbiology and ecology, agricultural faya national university of santiago del estero, argentina.

علی محمد arambarri | a m
spegazzini institute, fcnym, national university of la plata, argentina.

l منصو |
barrow-inta experimental station, tres arroyos, province of buenos aires, argentina.

میر ولایت الدین moreno | m v
laboratory of functional biology and biotechnology biolab-inbiotec-conicet-cic , national university of the center of the province of buenos aires, argentina.

نشانی اینترنتی http://jast.modares.ac.ir/article_15959_8fc8372151af91c4456845763911dcde.pdf
فایل مقاله اشکال در دسترسی به فایل - ./files/site1/rds_journals/476/article-476-314643.pdf
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