Rehabilitation of abandoned areas from a Mediterranean nature reserve by Salicornia crop: Influence of the salinity and shading     

Erika S. Santos  Miguel Salazar  Susana Mendes  Marco Lopes  Joana Pacheco  Domitília Marques 《Arid Land Research and Management》2017,31(1):29-45

In Reserva Natural de Castro Marim e Vila Real de Santo António (SE of Portugal), most of the salt marshes and saltpans are abandoned contributing to their degradation and, consequently, alteration of some ecological conditions. Rehabilitation of these areas by a Salicornia crop can contribute to their economic and environmental improvement by stimulation of biogeochemical processes and biomass commercialization. However, the development of agro-techniques adjusted to species and variable environmental conditions from Mediterranean are needed in order to improve the Salicornia crop. This study aimed to evaluate: i) potential use of seedlings from greenhouse in the field cultivation; and ii) survival, growth and yield of Salicornia under shading and different salinity conditions of the soils and irrigation waters. Autochthonous Salicornia species (S. ramosissima and S. patula) were tested. Germination tests under controlled conditions and in situ mesocosm assays were carried out. Assays were realized with a low density of seedlings from natural conditions and greenhouse, and soils and waters from estuary both with different salinities. Intermediate and high salinities (25–45?dS/m) affected only S. patula germination. In general, Salicornia growing in soils with low salinity had great fresh biomass accumulation independently of seedling source (from natural conditions and greenhouse) and/or growing season. The shading seems to improve the fresh biomass accumulation and yield. Under Mediterranean conditions, the transplantation of Salicornia from greenhouse to the field was a promising technique, independently of the salinity conditions. This study demonstrated that the abandoned and saline areas can be rehabilitated by a sustainable crop of Salicornia.  相似文献   

Leaching of imidazolinones in soils under a clearfield system     

Manoel Delintro de Castro Neto  Daniel Valadão Silva  Autieres Teixeiras Faria  Antônio Alberto da Silva  Gustavo Antônio Mendes Pereira 《Archives of Agronomy and Soil Science》2017,63(7):897-906

Herbicides with high mobility can leach to deeper layers of the soil and to contaminate underground aquifers. The potential of herbicide leaching in soil can be monitored by chromatography or bioassay methods. This study evaluated the leaching of imazethapyr, imazapic and its commercial mixture (imazethapyr + imazapic) in three tropical soils via a bioassay method. The herbicides were applied in a polyvinyl chloride column and an 80 mm rainfall was simulated. The bioindicator species sorghum (Sorghum vulgare) BRS 655 was sown. Imazethapyr, imazapic and the commercial herbicide mixture showed high leaching in the soils. The presence of imazethapyr and the commercial mixture was detected up to 25 cm deep in Haplic Plinthosol and Oxisol. Imazapic showed less leaching to tree soil, being found at depth 10–15 cm. The pH, texture and iron oxide amount levels affected herbicide leaching. The mobility of the herbicides imazethapyr and imazapic in the Haplic Plinthosol and the Oxisol at depth 25 cm indicates a high risk of groundwater contamination.  相似文献   

Respiratory Distress Resulting from Acute Lung Injury in the Veterinary Patient     

Charles W. Frevert DVM  Angeline E. Warner DVM  SD 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》1992,6(3):154-165

Because of improved management of animals in intensive care facilities, veterinarians are often confronted with patients at risk of developing adult respiratory distress syndrome (ARDS). The four objectives of this review are: 1) to describe the clinical conditions which place animals at risk for development of ARDS, 2) to give the reader a comprehensive understanding of the pathophysiology of endotoxin-induced lung injury, 3) to address the interspecies variability in susceptibility to endotoxin-induced lung injury, and 4) to outline areas where veterinarians should be concentrating their diagnostic and therapeutic efforts with regards to this syndrome. Because there is little written in the veterinary literature on ARDS, this review will rely heavily on the human ARDS literature as well as on research in animal models of acute lung injury.  相似文献   

Rabies in Madeira Island in 1892 - historical notes     

Mendes AM 《Historia medicinae veterinariae》2000,25(1-3):17-27

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Current techniques in rapid bluetongue virus diagnosis     

AR GOULD  AD HYATT  BT EATON  JR WHITE  PT HOOPER  SD BLACKSELL  PM Le BLANC SMITH 《Australian veterinary journal》1989,66(12):450-454

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Preliminary Evaluation of a Unique Freezing Technology for Bovine Spermatozoa Cryopreservation     

PZ Cotter  HA Goolsby  SD Prien 《Reproduction in domestic animals》2005,40(2):98-99

Artificial insemination (AI) and semen cryopreservation has significantly improved the breeding potential of male animals. However, current freezing techniques commonly result in reduced semen quality. Ten years ago, a unique freezing technology (UFT) was developed for the freezing of foodstuffs and other materials. Previous work from this laboratory has demonstrated the UFT to be a superior method of freezing for a number of cell types. In a preliminary study, the UFT was compared with the conventional freezing methodology of bovine semen. Semen samples were collected from an angus (Bull A) and a gelbivich bull (Bull B), prepared using a conventional bovine cryoprotectant, and frozen in the UFT or in liquid nitrogen (LN) mist. The samples were stored in LN before being thawed and assessed for the semen parameters of motility and forward progression. Preliminary results suggest the UFT is equivalent to current techniques in the cryopreservation and recovery of bovine semen, and with modification, possibly a superior technique for semen freezing. Further studies using larger sample populations, and using a CASA system to evaluate motility, forward progression and linearity are merited.  相似文献   

Influence of edge and topography on the vegetation in an Atlantic Forest remnant in northeastern Brazil     

Tassiane Novacosque Feitosa Guerra  Maria Jesus Nogueira Rodal  Ana Carolina Borges Lins e Silva  Marccus Alves  Maria Amanda Menezes Silva  Poliana Gabriella de Araújo Mendes 《Journal of Forest Research》2013,18(2):200-208

Like edge effects, variations in topography can influence the physiognomy and structural patterns of the vegetation due to the high dynamics encountered in inclined areas. We evaluated the effect of edges on the structure and physiognomy of the arboreal and woody understory communities in patches of an Atlantic Forest remnant in two distinct topographic positions. Four study situations were laid out (slope edge, top edge, slope interior, and top interior), with ten 10 × 10 m plots each to sample the arboreal components (circumference at breast height ≥15 cm), and ten 5 × 5 m plots (in the corner of each arboreal component plot) to sample the woody understory (circumference at ground level ≥3 cm and with circumference at breast height <15 cm). We investigated physiognomic and structural variables of edge and interior environments in similar topographic positions on both slope and top (level) areas of the same remnant forest. Physiognomic and structural differences between edge and interior vegetation were noted, and these were found to be still more evident when different topographic positions were considered. Physiognomic and structural variations between the edge and interior vegetation were more notable on slopes than on hill tops, indicating greater dynamics in areas with greater topographic inclinations.  相似文献   

Genotype-environment interaction for productive traits of Holstein cows in Brazil described by reaction norms     

Santos  Jarbas Corrêa  Malhado  Carlos Henrique Mendes  Cobuci  Jaime Araújo  de Rezende  Marcos Paulo Gonçalves  Carneiro  Paulo Luiz Souza 《Tropical animal health and production》2020,52(5):2425-2432

Tropical Animal Health and Production - Brazil is the world’s fourth largest milk producer; this activity extends throughout the national territory, with productions of approximate 34 billion...  相似文献   

Bone morphogenetic protein 15 supplementation enhances cumulus expansion,nuclear maturation and progesterone production of in vitro-matured bovine cumulus-oocyte complexes     

Juliana de Carvalho Delgado  Thais Rose dos Santos Hamilton  Camilla Mota Mendes  Adriano Felipe Perez Siqueira  Marcelo Demarchi Goissis  José Buratini  Mayra Elena Ortiz D’Ávila Assumpção 《Reproduction in domestic animals》2021,56(5):754-763

In vitro embryo production (IVP) efficiency is reduced when compared to in vivo. The basic knowledge of bovine in vitro oocyte maturation (IVM) mechanisms provides support to improve in vitro embryo production yields. The present study assessed the effects of bone morphogenetic protein 15 (BMP15), fibroblast growth factor 16 (FGF16) and their combined action on cumulus cells (CC) expansion, oocyte and CC DNA fragmentation, oocyte nuclear maturation, energetic metabolism and progesterone production in bovine IVM. Cumulus-oocyte complexes (COC) were matured in control or supplemented media containing BMP15 (100 ng/ml), FGF16 (10 ng/ml) or BMP15 combined with FGF16; and assessed at 0 and 22 hr of IVM. BMP15 alone or its association with FGF16 enhanced cumulus expansion. BMP15 decreased DNA fragmentation in both CC and oocytes, and improved oocyte nuclear maturation rate. In addition, BMP15 increased CC progesterone production, an effect not previously reported. The present study reinforces previous data pointing to a beneficial influence of BMP15 during IVM, while providing novel evidence that the underlying mechanisms involve increased progesterone production.  相似文献   

The effect of sex and genotype on growth performance,feed efficiency,and carcass traits of local sheep group Pantaneiro and Texel or Santa Inês crossbred finished on feedlot     

Fernando Miranda de Vargas Junior  Charles Ferreira Martins  Guilherme dos Santos Pinto  Marcos Barbosa Ferreira  Hélio de Almeida Ricardo  André Gustavo Leão  Alexandre Rodrigo Mendes Fernandes  Alfredo Teixeira 《Tropical animal health and production》2014,46(5):869-875

This study aimed to assess and compare the growth performance, feed efficiency, and carcass traits of Pantaneiro sheep and their Texel and Santa Inês crossbreds. Ninety-six lambs, fifty-one males, and forty-five females, with a mean weaning weight of 15.21?±?1.25 kg and 78?±?13 days of age, were slaughtered at a 32-kg body weight. The results showed better production efficiency from males compared with females. Texel-crossed lambs had a better growth performance than the other genotypes. The Texel?×?Pantaneiro lambs were more efficient with a better feedlot performance, higher ribeye muscle area, and better carcass characteristics with an adequate amount of fat cover. Pantaneiro lambs and their crosses with meat breeds could be useful in meat production systems under Savanna environmental conditions.  相似文献