Brazilian savannah 'will disappear by 2030'

This study presents the first records from three genera Hypocopra, Pyxidiophora, Zopfiella and the second of the rare species, Cercophora coronata (Cailleux) Udagawa and T. Muroi, for Brazil. It also presents the first record of H. stercoraria (Sowerby) Sacc., P. arvernensis (Breton and Faurel) N. Lundq. and Z. latipes (N. Lundq.) Malloch and Cain for the Neotropical region. Specimens were obtained from dung collected in areas of the Brazilian Savannah cultured in moist chambers. Distribution data, taxonomic descriptions and new substrate records for are presented.

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Economic analysis of rice and common bean production in succession to green manure crops and mecahnical soil decompression in Brazilian Savannah

Revista CERES ◽

10.1590/0034-737x201663030006 ◽

2016 ◽

Vol 63 (3) ◽

pp. 315-322 ◽

Cited By ~ 3

Author(s):

Vagner do Nascimento ◽

Orivaldo Arf ◽

Maria Aparecida Anselmo Tarsitano ◽

Nayara Fernanda Siviero Garcia ◽

Mariele de Souza Penteado ◽

...

Keyword(s):

Common Bean ◽

Green Manure ◽

Cajanus Cajan ◽

Pennisetum Glaucum ◽

Upland Rice ◽

Green Manures ◽

Mato Grosso ◽

Brazilian Savannah ◽

Soil Scarification ◽

Mato Grosso Do Sul

ABSTRACT The previous cultivation of green manures and mechanical soil decompression are options to minimize compaction of the topsoil in no-tilage system (NTS) set in different production systems in the Brazilian Savannah. In addition, it is essential to relate these agricultural practices with the economic benefits generated through the production cycles. The objective of this study was to evaluate economically the effect of sporadic mechanical decompression of the soil and previous cultivation of green manure in the production and net gain margin of upland rice and "winter" common bean, under sprinkler irrigation, in NTS in lowland Brazilian savannah. This study was developed in the 2012/13 harvest and 2013 winter in Selvíria, state of Mato Grosso do Sul, in an clay texture Oxisol in the savanah in the state of Mato Grosso do Sul, in a randomized block design arranged in a 5 x 2 factorial arrangement with four replications. The treatments were a combination of five green manures (fallow (control), Cajanus cajan, Crotalaria juncea, Pennisetum glaucum and Urochloa ruziziensis) with and without mechanical soil scarification. The yields of upland rice and common bean grains were not influenced by the previous green manure cultivation; the upland rice grown in succession to Cajanus cajan in the presence of mechanical soil scarification provided greater increase in grain yield and higher gross margin profit. Beans cultivated in succession to Crotalaria juncea and Pennisetum glaucum in the presence of mechanical soil scarification, followed by rice cultivation, provided greater increases in grain yield and gross profit margins.

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Structure and biodiversity of zooplankton communities in freshwater habitats of a Vereda Wetland Region, Minas Gerais, Brazil

Acta Limnologica Brasiliensia ◽

10.1590/s2179-975x0415 ◽

2015 ◽

Vol 27 (3) ◽

pp. 275-288 ◽

Cited By ~ 4

Author(s):

Olívia Penatti Pinese ◽

José Fernando Pinese ◽

Kleber Del Claro

Keyword(s):

Aquatic Macrophytes ◽

Biological Diversity ◽

Zooplankton Community ◽

Environmental Parameters ◽

Minas Gerais ◽

Southeastern Brazil ◽

Brazilian Savannah ◽

Local Diversity ◽

Freshwater Habitats ◽

The Difference

Abstract Aims: Vereda wetlands are among the most important aquatic habitats in Brazilian savannah (Cerrado) because of their association with river springs and its relevancy for biodiversity conservation. This study aimed to determine and compare the biodiversity of zooplankton in vereda lakes, differentiated by the presence or absence of aquatic macrophytes at an environmental reserve in Uberlândia, Minas Geais, Southeastern Brazil. Zooplanctonic abundance patterns and their relation with environmental parameters were also discussed and presented through multivariate statistics. Methods Twelve samples were taken at water surface, at 15-day intervals in 2006. It was observed a total richness of 75 species, including 12 genera, 29 species and one sub-species as new records for Minas Gerais State. Results Rotifers were the predominant group and Lecanidae was the most diverse family. Among cladocerans, Chydoridae showed the greatest richness and Bosminidae the highest abundance. Few adult copepods were sampled in this study, but nauplii were very frequent. Cyclopidae was the most common family among copepods and there was no record of Calanoida. Conclusions The difference in composition among the studied lakes was remarkable. The lake with macrophytes showed the greatest richness but the lowest density, and the opposite situation occurred in the other lake. This can be explained by the fact that aquatic macrophytes, as primary producers, exert a bottom-up effect on zooplankton community, sustaining a high local diversity in contrast with a low numeric abundance of these microorganisms. Therefore, this pattern may have been created by the surround heterogeneity and, at the same time, by the reduction of available minerals of the system caused by macrophyte matter fixation. Many studies on zooplankton need to be developed in palm swamp communities in order to better comprehend the biological diversity and the energy balance in different habitats for the conservation of aquatic ecosystems.

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Crop rotation, green manure and nitrogen fertilizers in upland rice under no-tillage

Pesquisa Agropecuária Tropical ◽

10.1590/1983-40632018v4851446 ◽

2018 ◽

Vol 48 (2) ◽

pp. 153-162 ◽

Cited By ~ 5

Author(s):

Orivaldo Arf ◽

José Roberto Portugal ◽

Salatiér Buzetti ◽

Ricardo Antônio Ferreira Rodrigues ◽

Marco Eustáquio de Sá

Keyword(s):

Cover Crops ◽

Upland Rice ◽

Irrigation System ◽

Block Design ◽

Sprinkler Irrigation ◽

Pigeon Pea ◽

Nitrogen Fertilizers ◽

No Tillage ◽

Brazilian Savannah ◽

Corn Crop

ABSTRACT The Brazilian Savannah region presents a great potential for the expansion of upland rice crops. However, studies are necessary to identify practices that can improve the crop performance, especially in no-tillage systems. This study aimed to assess the effect of cover crops in association with corn on the development and yield of rice cultivated in rotation and cover fertilized with nitrogen doses. The sprinkler irrigation system was used and the experiment was developed in the 2014/2015 and 2016/2017 harvest years, using a randomized block design, in a 5 × 4 factorial scheme. The treatments consisted of the crop remains combinations of single corn crop, corn + Crotalaria spectabilis, corn + pigeon pea, corn + jack bean and corn + Urochloa ruziziensis, as well as cover nitrogen doses (0 kg ha-1, 40 kg ha-1, 80 kg ha-1 and 120 kg ha-1) in the rice. The cultivation of upland rice in rotation with corn + pigeon pea was favored by the greater soil cover and nitrogen supply via cycling, if compared to the rotation with single corn crop. The intercropped corn + pigeon pea cultivation in the previous summer resulted in a 15 % increase in the yield of rice grains seeded in the rotation, when compared to the single corn crop. The cover nitrogen application positively influenced the grain yield with the maximum estimated doses of 46 kg ha-1 and 105 kg ha-1 of nitrogen, respectively in the 2014/2015 and 2016/2017 harvest years.

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