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72 results for “fertiliser”
Data from: Afforestation-related fertilisation quickly turns barren cutaway peatland into a carbon dioxide sink
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Polyandry and non-random fertilisation maintain long-term genetic diversity in an isolated island population of adders (Vipera berus)
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Indirect parental effects on offspring fitness by egg-derived fluids in an external fertiliser
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CO2-fertilisation enhances resilience to browsing in the recruitment phase of an encroaching savanna tree
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Data from: The thermal environment at fertilisation mediates adaptive potential in the sea
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Data from: Post-ejaculation thermal stress causes changes to the RNA profile of sperm in an external fertiliser
<p>Sperm cells experience considerable post-ejaculation environmental variation. However, little is known about whether this affects their molecular composition, likely due to the assumption that sperm are transcriptionally quiescent. Nevertheless, recent evidence shows sperm have distinct RNA profiles that affect fertilisation and embryo viability. Moreover, RNAs are expected to be highly sensitive to extracellular changes. One such group of RNAs are heat shock protein (hsp) transcripts, which function in stress responses and are enriched in sperm. Here, we exploit the tractability of the mussel <i>Mytilus galloprovincialis </i>to exposed paired samples of ejaculated sperm to ambient (19 °C) and increased (25 °C) temperatures, then measure (a) sperm motility phenotypes, and (b) mRNA levels of two target genes (<i>hsp70 </i>and <i>hsp90</i>) and several putative reference genes. We find no phenotypic changes in motility, but reduced mRNA levels for <i>hsp90 </i>and the putative reference gene <i>gapdh</i> at 25 °C. This could reflect either decay of specific RNAs, or changes in translation and degradation rates of transcripts to maintain sperm function under stress. These findings represent the first evidence for changes in sperm RNA profiles due to post-ejaculation environments, and suggest that sperm may be more vulnerable to stress from rising temperatures than currently thought.</p>
Data from: Differential effects of fertilisers on pollination and parasitoid interaction networks
Grassland fertilisation drives non-random plant loss resulting in areas dominated by perennial grass species. How these changes cascade through linked trophic levels, however, is not well understood. We studied how grassland fertilisation propagates change through the plant assemblage into the plant-flower visitor, plant-leaf miner and leaf miner-parasitoid networks using a year's data collection from a long-term grassland fertiliser application experiment. Our experiment had three fertiliser treatments each applied to replicate plots 15 m2 in size: mineral fertiliser, farmyard manure, and mineral fertiliser and farmyard manure combined, along with a control of no fertiliser. The combined treatment had the most significant impact, and both plant species richness and floral abundance decreased with the addition of fertiliser. While insect species richness was unaffected by fertiliser treatment, fertilised plots had a significantly higher abundance of leaf miners and parasitoids and a significantly lower abundance of bumblebees. The plant-flower visitor and plant-herbivore networks showed higher values of vulnerability and lower modularity with fertiliser addition, while leaf miner-parasitoid networks showed a rise in generality. The different groups of insects were impacted by fertilisers to varying degrees: while the effect on abundance was the highest for leaf miners, the vulnerability and modularity of flower visitor networks was the most affected. The impact on the abundance of leaf miners was positive and three times higher than the impact on parasitoids, and the impact on bumblebee abundance was negative and double the magnitude of impact on flower abundance. Overall our results show that while insect species richness was unaffected by fertilisers, network structure changed significantly as the replacement of forbs by grasses resulted in changes in relative abundance across trophic levels, with the direction of change depending on the type of network. By studying multiple networks simultaneously, we were able to rank the relative impact of habitat change on the different groups of species within the community. This provided a more holistic picture of the impact of agricultural intensification and provides useful information when deciding on priorities for mitigation. 01-Oct-2020
Data from: High fidelity: extra-pair fertilisations in eight Charadrius plover species are not associated with parental relatedness or social mating system
Extra-pair paternity is a common reproductive strategy in many bird species. However, it remains unclear why extra-pair paternity occurs and why it varies among species and populations. Plovers (Charadrius spp.) exhibit considerable variation in reproductive behaviour and ecology, making them excellent models to investigate the evolution of social and genetic mating systems. We investigated inter- and intra-specific patterns of extra-pair parentage and evaluated three major hypotheses explaining extra-pair paternity using a comparative approach based on the microsatellite genotypes of 2,049 individuals from 510 plover families sampled from twelve populations that constituted eight species. Extra-pair paternity rates were very low (0 to 4.1% of chicks per population). No evidence was found in support of the sexual conflict or genetic compatibility hypotheses, and there was no seasonal pattern of extra-pair paternity (EPP). The low prevalence of EPP is consistent with a number of alternative hypotheses, including the parental investment hypothesis, which suggests that high contribution to care by males restricts female plovers from engaging in extra-pair copulations. Further studies are needed to critically test the importance of this hypothesis to plover mate choice.
Evaluating the Fertilising Potential of Blended Recovered Nutrients in Horticultural Growing Medium on Viola x wittrockiana L.
<p><i>Viola x wittrockiana</i> L. is an ornamental plant in high demand in horticulture. It is becoming more critical for greenhouse growers to focus on sustainable production to enhance plant quality while reducing negative environmental impacts. Therefore, assessing the effect of recycled phosphorous (P) and nitrogen (N) sources on the growth of viola could become very useful for producers in terms of sustainability. This experiment analysed the optimal fertiliser composition to grow viola using recovered fertilisers in a greenhouse trial under controlled conditions. Well-rooted viola plugs were grown in a standard peat-based growing medium. Using recycled sources of P and N as struvite and potassium struvite, ammonium sulphate, and ammonium nitrate, 14 fertiliser blends were prepared, tested, and compared with the slow-release commercial fertiliser Osmocote. Plants treated with ammonium nitrate showed healthy growth and optimal plant N concentrations. In contrast, most blends using the recovered ammonium sulphate resulted in an unacceptable increase of ammonium concentrations in the growing medium. The combination of ammonium sulphate and potassium sulphate caused an increase in the electrical conductivity in the growing medium, negatively affecting plant growth. However, blend 13 containing struvite, ammonium sulphate and potassium struvite expressed the best chemical composition with non-significant differences in the biomass from the positive controls, as it reduced the amount of potassium sulphate needed. Our results indicate that fertiliser blends containing P as struvite, N as ammonium nitrate or reduced amount of ammonium sulphate, and K as potassium struvite can substitute the use of mineral fertiliser blends to grow ornamental plant species as viola.</p>
Replacing Mineral Fertilisers for Bio-Based Fertilisers in Potato Growing on Sandy Soil: A Case Study
<p>The refinement level of bio-based fertilisers (BBFs) can influence environmental and agronomic performance. This study analyses the environmental and agronomic effect of different BBFs on potato growing in sandy soil. A less refined product (liquid fraction of digestate (LFD)), two refined products (ammonium sulphate (AS) and potassium concentrate (KC)), and mineral fertilizer (MF) are compared by conducting: (i) a nitrogen (N) incubation experiment where the N release rate of the BBFs is determined, (ii) a greenhouse gas emission experiment where N<sub>2</sub>O, CO<sub>2</sub>, and CH<sub>4</sub> emissions after BBF application are measured, (iii) a pot experiment where the nutrient fertiliser replacement value (NFRV) of the BBF is calculated, and (iv) a full-scale field trial where the potato quality and quantity and the remaining N residues in the soil after harvest are assessed. The N release rate and the NFRV of AS (142 ± 19% and 1.13, respectively) was higher compared with the LFD (113 ± 24% and 1.04) and MF (105 ± 16% and 1.00). Lowest N<sub>2</sub>O emissions were observed after the application of the less refined product (0.02 ± 0.01 per 100 g N applied) and highest for MF urea (0.11 ± 0.02 per 100 g N applied). In the full-scale field trial, no significant difference in potato yield was observed in the plots that received manure in combination with BBF or MF. This study showed that all three BBFs can safely be used in potato growing on sandy soils. However, the adoption of BBFs can be stimulated by (i) solving the practical issues that occurred during the application of LFD, (ii) making sure BBFs are on the list of RENURE materials so they can legally replace mineral fertiliser, and (iii) reducing the surplus of slurry manure to stimulate the use and fair pricing of BBF products.</p>
Supplementation With Human Chorionic Gonadotropin (hCG) During Controlled Ovarian Stimulation With Recombinant Follicle-stimulating Hormone (FSH) for In Vitro Fertilisation
ClinicalTrials.gov study NCT00844311. IPD Sharing: Not stated. Countries: 1. Publications: 2.
Study to Assess the Patterns of Use of REKOVELLE® in Naïve Women Undergoing In Vitro Fertilisation or Intracytoplasmic Sperm Injection Procedures
ClinicalTrials.gov study NCT03393780. IPD Sharing: Not stated. Countries: 10. Publications: 1.
Corifollitropin Alfa Versus Recombinant Follicle Stimulating Hormone (FSH) in Ovarian Stimulation of Women Undergoing in Vitro Fertilisation
ClinicalTrials.gov study NCT01319695. IPD Sharing: UNDECIDED. Countries: 1. Publications: 1.
Clinical Tolerance and Equivalence of hCG-IBSA vs Recombinant Human Chorionic Gonadotrophin in Women Undergoing In Vitro Fertilisation
ClinicalTrials.gov study NCT00335569. IPD Sharing: Not stated. Countries: 1. Publications: 12.
Trial to Assess the Pattern of Use of REKOVELLE® in Women Undergoing In Vitro Fertilisation (IVF) or Intracytoplasmic Sperm Injection (ICSI) Procedures in Routine Clinical Practice
ClinicalTrials.gov study NCT05499052. IPD Sharing: NO. Countries: 4. Publications: 1.
A Dose-response Trial Using FE 999049 in Japanese Women Undergoing in Vitro Fertilisation (IVF) / Intracytoplasmic Sperm Injection (ICSI) Treatment
ClinicalTrials.gov study NCT02309671. IPD Sharing: Not stated. Countries: 1. Publications: 1.
Vitamin D During In Vitro Fertilisation (IVF) - A Prospective Randomized Trial
ClinicalTrials.gov study NCT01019785. IPD Sharing: Not stated. Countries: 1. Publications: 3.
Evaluation of a Mobile Preconception Lifestyle Programme in Couples Undergoing In Vitro Fertilisation
ClinicalTrials.gov study NCT03790449. IPD Sharing: YES. Countries: 1. Publications: 3.
Data from: Postmating-prezygotic isolation between two allopatric populations of Drosophila montana: fertilisation success differs under sperm competition
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Data from: Post-ejaculation thermal stress causes changes to the RNA profile of sperm in an external fertiliser
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Allen Brain Atlas
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DANDI Archive for NWB datasets
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International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.