scholarly journals Reduced Nitrogen Fertilization to Corn following Alfalfa in an Irrigated Semiarid Environment

2011 ◽  
Vol 103 (2) ◽  
pp. 520-528 ◽  
Author(s):  
Sebastián Cela ◽  
Montserrat Salmerón ◽  
Ramón Isla ◽  
José Cavero ◽  
Francisca Santiveri ◽  
...  
Keyword(s):  
Nitrogen Fertilization ◽  
Semiarid Environment ◽  
Reduced Nitrogen

scholarly journals Depression of Groundwater Table and Reduced Nitrogen Application Jointly Regulate the Bacterial Composition of nirS-Type and nirK-Type Genes in Agricultural Soil

Water ◽  
2020 ◽  
Vol 12 (12) ◽  
pp. 3459
Author(s):  
Fangfang Bai ◽  
Xuebin Qi ◽  
Ping Li ◽  
Dongmei Qiao ◽  
Jianming Wang ◽  
...  
Keyword(s):  
Species Composition ◽  
Nitrogen Fertilization ◽  
Bacterial Communities ◽  
Agricultural Soil ◽  
Soil Microbial Communities ◽  
Groundwater Table ◽  
Nitrogen Application ◽  
Bacterial Composition ◽  
Reduced Nitrogen ◽  
The Impact

Despite the known influence of nitrogen fertilization and groundwater conditions on soil microbial communities, the effects of their interactions on bacterial composition of denitrifier communities have been rarely quantified. Therefore, a large lysimeter experiment was conducted to examine how and to what extent groundwater table changes and reduced nitrogen application would influence the bacterial composition of nirK-type and nirS-type genes. The bacterial composition of nirK-type and nirS-type genes were compared at two levels of N input and three groundwater table levels. Our results demonstrated that depression of groundwater table, reduced nitrogen application and their interactions would lead to drastic shifts in the bacterial composition of nirS-type and nirK-type genes. Structural equation models (SEMs) indicated that depression of groundwater table and reduced nitrogen application not only directly altered the species composition of denitrifier bacterial communities, but also indirectly influenced them through regulating soil nutrient and salinity. Furthermore, the variation in soil NO3−–N and electrical conductivity caused by depression of groundwater table and reduced nitrogen application played the most important role in altering the community composition of denitrifier bacterial communities. Together, our findings provide first-hand evidence that depression of groundwater table and reduced nitrogen application jointly regulate the species composition of denitrifier bacterial communities in agricultural soil. We highlight that local environmental conditions such as groundwater table and soil attributes should be taken into account to enrich our knowledge of the impact of nitrogen fertilization on soil denitrifier bacterial communities, or even biogeochemical cycles.

scholarly journals The influence of benefit microorganisms on yield and quality of soybean grains under conditions of reduced nitrogen fertilization

Poljoprivreda ◽  
2017 ◽  
Vol 23 (2) ◽  
pp. 25-30
Author(s):  
Suzana Kristek ◽  
◽  
Lidija Lenar ◽  
Jurica Jović ◽  
Tihana Marček ◽  
...  
Keyword(s):  
Nitrogen Fertilization ◽  
Yield And Quality ◽  
Reduced Nitrogen

Effects of catch crops, no till and reduced nitrogen fertilization on nitrogen leaching and balance in three long-term experiments

2010 ◽  
Vol 135 (4) ◽  
pp. 268-278 ◽  
Author(s):  
J. Constantin ◽  
B. Mary ◽  
F. Laurent ◽  
G. Aubrion ◽  
A. Fontaine ◽  
...  
Keyword(s):  
Nitrogen Fertilization ◽  
Nitrogen Leaching ◽  
Catch Crops ◽  
No Till ◽  
Long Term Experiments ◽  
Reduced Nitrogen

scholarly journals Use of winter cover crops improves maize productivity under reduced nitrogen fertilization: a long-term study

Bragantia ◽  
2021 ◽  
Vol 80 ◽  
Author(s):  
Jonatas Thiago Piva ◽  
Felipe Bratti ◽  
Jorge Luiz Locatelli ◽  
Ricardo Henrique Ribeiro ◽  
Marcos Renan Besen ◽  
...  
Keyword(s):  
Cover Crops ◽  
Nitrogen Fertilization ◽  
Term Study ◽  
Maize Productivity ◽  
Long Term Study ◽  
Reduced Nitrogen ◽  
Winter Cover ◽  
Winter Cover Crops

scholarly journals Effect of Long-Term Farming Practices on Agricultural Soil Microbiome Members Represented by Metagenomically Assembled Genomes (MAGs) and Their Predicted Plant-Beneficial Genes

Genes ◽  
2019 ◽  
Vol 10 (6) ◽  
pp. 424 ◽  
Author(s):  
Johanna Nelkner ◽  
Christian Henke ◽  
Timo Wentong Lin ◽  
Wiebke Pätzold ◽  
Julia Hassa ◽  
...  
Keyword(s):  
Plant Growth ◽  
Growth Regulators ◽  
Nitrogen Fertilization ◽  
Soil Samples ◽  
Soil Microbiome ◽  
Farming Practices ◽  
Metagenomic Dna ◽  
Reduced Nitrogen ◽  
Microbiome Profiling

To follow the hypothesis that agricultural management practices affect structure and function of the soil microbiome regarding soil health and plant-beneficial traits, high-throughput (HT) metagenome analyses were performed on Chernozem soil samples from a long-term field experiment designated LTE-1 carried out at Bernburg-Strenzfeld (Saxony-Anhalt, Germany). Metagenomic DNA was extracted from soil samples representing the following treatments: (i) plough tillage with standard nitrogen fertilization and use of fungicides and growth regulators, (ii) plough tillage with reduced nitrogen fertilization (50%), (iii) cultivator tillage with standard nitrogen fertilization and use of fungicides and growth regulators, and (iv) cultivator tillage with reduced nitrogen fertilization (50%). Bulk soil (BS), as well as root-affected soil (RS), were considered for all treatments in replicates. HT-sequencing of metagenomic DNA yielded approx. 100 Giga bases (Gb) of sequence information. Taxonomic profiling of soil communities revealed the presence of 70 phyla, whereby Proteobacteria, Actinobacteria, Bacteroidetes, Planctomycetes, Acidobacteria, Thaumarchaeota, Firmicutes, Verrucomicrobia and Chloroflexi feature abundances of more than 1%. Functional microbiome profiling uncovered, i.a., numerous potential plant-beneficial, plant-growth-promoting and biocontrol traits predicted to be involved in nutrient provision, phytohormone synthesis, antagonism against pathogens and signal molecule synthesis relevant in microbe–plant interaction. Neither taxonomic nor functional microbiome profiling based on single-read analyses revealed pronounced differences regarding the farming practices applied. Soil metagenome sequences were assembled and taxonomically binned. The ten most reliable and abundant Metagenomically Assembled Genomes (MAGs) were taxonomically classified and metabolically reconstructed. Importance of the phylum Thaumarchaeota for the analyzed microbiome is corroborated by the fact that the four corresponding MAGs were predicted to oxidize ammonia (nitrification), thus contributing to the cycling of nitrogen, and in addition are most probably able to fix carbon dioxide. Moreover, Thaumarchaeota and several bacterial MAGs also possess genes with predicted functions in plant–growth–promotion. Abundances of certain MAGs (species resolution level) responded to the tillage practice, whereas the factors compartment (BS vs. RS) and nitrogen fertilization only marginally shaped MAG abundance profiles. Hence, soil management regimes promoting plant-beneficial microbiome members are very likely advantageous for the respective agrosystem, its health and carbon sequestration and accordingly may enhance plant productivity. Since Chernozem soils are highly fertile, corresponding microbiome data represent a valuable reference resource for agronomy in general.

scholarly journals INOCULATION WITH Azospirillum brasilense ASSOCIATED WITH REDUCED NITROGEN FERTILIZATION IN MAIZE HYBRIDS

Nucleus ◽  
2016 ◽  
Vol 13 (2) ◽  
pp. 241-252
Author(s):  
Paloma Helena da Silva LIBÓRIO ◽  
Ivana Marino BÁRBARO-TORNELI ◽  
Fábio Olivieri de NÓBILE ◽  
Maria Gabriela ANUNCIAÇÃO ◽  
Fernando Bergantini MIGUEL ◽  
...  
Keyword(s):  
Nitrogen Fertilization ◽  
Azospirillum Brasilense ◽  
Maize Hybrids ◽  
Reduced Nitrogen
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