Results 21 to 30 of about 7,838 (225)

Efficient carbon and nitrogen transfer from marine diatom aggregates to colonizing bacterial groups

Scientific Reports, 2022
Bacterial degradation of sinking diatom aggregates is key for the availability of organic matter in the deep-ocean. Yet, little is known about the impact of aggregate colonization by different bacterial taxa on organic carbon and nutrient cycling within ...
Nestor Arandia-Gorostidi, Hugo Berthelot, Federica Calabrese, Hryhoriy Stryhanyuk, Isabell Klawonn, Morten Iversen, Nurun Nahar, Hans-Peter Grossart, Helle Ploug, Niculina Musat   +9 more
doaj   +1 more source

δ15N value does not reflect fasting in mysticetes. [PDF]

PLoS ONE, 2014
The finding that tissue δ(15)N values increase with protein catabolism has led researchers to apply this value to gauge nutritive condition in vertebrates. However, its application to marine mammals has in most occasions failed.
Alex Aguilar, Joan Giménez, Encarna Gómez-Campos, Luís Cardona, Asunción Borrell   +4 more
doaj   +1 more source

Short-term changes of the δ15N natural abundance of aboveground biomass and topsoil in temperate grassland – Effects of prolonged summer drought

Ecological Indicators, 2021
Analysis of isotopic signatures of nitrogen (15N) is a widely used method for identifying and tracking pathways of N losses in agriculture. It is not yet clear what drives the development of the isotopic signal over time after change of management in ...
Friederike Sieve, Johannes Isselstein, Manfred Kayser   +2 more
doaj   +1 more source

ACCELERATED CELL DEATH 6 Acts on Natural Leaf Senescence and Nitrogen Fluxes in Arabidopsis

Frontiers in Plant Science, 2021
As the last step of leaf development, senescence is a molecular process involving cell death mechanism. Leaf senescence is trigged by both internal age-dependent factors and environmental stresses.
Sophie Jasinski, Isabelle Fabrissin, Amandine Masson, Anne Marmagne, Alain Lécureuil, Laurence Bill, Fabien Chardon   +6 more
doaj   +1 more source

Fate of fertilizer nitrogen and residual nitrogen in paddy soil in Northeast China

Journal of Integrative Agriculture, 2023
The relationship between the fate of nitrogen (N) fertilizer and the N application rate in paddy fields in Northeast China is unclear, as is the fate of residual N.
Shi-ting BI, Xiang-yu LUO, Chen ZHANG, Peng-fei LI, Cai-lian YU, Zhi-lei LIU, Xian-long PENG   +6 more
doaj   +1 more source

Perda de nitrogênio pela Brachiaria decumbens após a antese: relação com a umidade do solo Nitrogen loss through Brachiaria decumbens after anthesis stage: relation with soil moisture

Ciência Rural, 2008
Com o objetivo de avaliar a perda de N por plantas de Brachiaria decumbens no estádio da pós-antese relacionada com a umidade do solo, realizou-se um experimento em casa-de-vegetação, em delineamento inteiramente casualizado, com três tratamentos e seis ...
Henrique Coutinho Junqueira Franco, Virgínia Damin, Ademir Franco, Milton Ferreira Moraes, Paulo Cesar Ocheuze Trivelin   +4 more
doaj   +1 more source

Nitrogen Balance of Effluent Irrigated Silage Cropping Systems in Southern Australia

The Scientific World Journal, 2001
The nitrogen (N) balance in a double-cropped, effluent spray irrigation system was examined for several years in southern Australia. The amounts of N added by irrigation, removed in the crop, and lost by ammonia (NH3) volatilisation, denitrification, and
Chris J. Smith, Val O. Snow, Ray Leuning, David Hsu   +3 more
doaj   +1 more source

Aproveitamento pela cana-de-açúcar da adubação nitrogenada de plantio Utilization by sugar cane of nitrogen applied at planting

Revista Brasileira de Ciência do Solo, 2008
O balanço de 15N de fontes nitrogenadas no sistema solo-planta tem sido de muita valia em estudos das transformações do N em diferentes agroecossistemas.
Henrique Coutinho Junqueira Franco, Paulo Cesar Ocheuze Trivelin, Carlos Eduardo Faroni, André Cesar Vitti, Rafael Otto   +4 more
doaj   +1 more source

Effects of Tillage and Crop Residue Application on Soybean Nitrogen Fixation in a Tropical Ferralsol

Agriculture, 2011
This study was aimed at quantifying soybean (Glycine max) nitrogen fixation under reduced tillage (RT) and conventional tillage (CT) in a tropical Ferralsol of the sub-humid zone of western Kenya, using the isotope 15N dilution method.
Paul L. G. Vlek, Andre Bationo, Christopher Martius, Job Kihara   +3 more
doaj   +1 more source

The effectiveness nitrogen balance urea cotton using nitrification inhibitor washed typical sierozems [PDF]

BIO Web of Conferences
In the conditions of the sierozem zone soils, where the nitrogen content is relatively low, nitrogen fertilizers play the leading role among the fertilizers used for cotton. Nitrogen losses due to washout, denitrification, etc., during the growing season
Khashimov F.Kh., Tashkenbaev O.N., Umurzakov A.A.   +2 more
doaj   +1 more source