2 edition of role of nitrogen in grassland productivity found in the catalog.
role of nitrogen in grassland productivity
David Charles Whitehead
|Statement||by D. C. Whitehead.|
|Series||Bulletin / Commonwealth Bureau of Pastures and Field Crops -- 48, Bulletin (Commonwealth Bureau of Pastures and Field Crops) -- 48.|
|Contributions||Commonwealth Bureau of Pastures and Field Crops.|
|The Physical Object|
|Number of Pages||202|
Grassland productivity limited by multiple nutrients Philip A. Fay et al.* Terrestrial ecosystem productivity is widely accepted to be nutrient limited1. Although nitrogen (N) is deemed a key deter-minant of aboveground net primary production (ANPP)2,3, the prevalence of co-limitation by N and phosphorus (P) is increas-ingly recognized4–8. The productivity of temperate grassland is limited by the response of plants to low temperature, affecting winter persistence and seasonal growth rates. During the winter, the growth of perennial grasses is restricted by a combination of low temperature and the lack of available light, but during early spring low ground temperature is the main limiting by:
Chapter 11 (Page no: ) Role and impacts of legumes in grasslands for high productivity and N gain from symbiotic N 2 fixation. The use of legume species within grassland vegetation is discussed with two very interesting perspectives: (i) the functional role of legume species in biodiversity, and (ii) the adaption of these species to elevated CO 2 conditions by regulating N cycling. The conversion of nitrites and nitrates into atmospheric nitrogen. The loss or removal of nitrogen or nitrogen compounds; specifically: reduction of nitrates or nitrites commonly by bacteria (as in soil) that usually results in the escape of nitrogen into the air.
The results indicate that the increase in nitrogen levels have influence on the significant change of the floristic composition of natural meadow. The relative weight composition of unfertilized grassland was: % of grasses, % of legumes and % of other plant species. By . These continuous classifications show the generality of the two strategies for dealing with low nitrogen availability (N 2 fixation and the low‐N suite of traits) and extends the strategies to span organ‐level traits to ecosystem processes including roots, whole‐plant patterns of productivity, and nutrient cycling. The correlations of Cited by:
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Grassland ecosystems are deeply affected by human activities and need appropriate management to optimise trade-offs between ecosystem functions and services. Until now they have mainly been analysed as agro-ecosystems for animal production but this book looks beyond the role of grassland as a feeding ground, and evaluates other important processes such as carbon sequestration in.
Grassland Nitrogen: Transformations of N. Transformations of N in grasslands represent inputs of N that occur through the application of fertilizers and manures, the deposition of excreta from grazing animals, the fixation of N 2 by microorganisms, and the deposition of ammonia and nitrate from the atmosphere.
Outputs of N occur through the removal of grass or animal products, leaching Author: P.K. Ghosh, S.K. Mahanta, S.N. Ram. In England and Wales there are about million acres of temporary grass and 10 million acres of permanent grass. The latest Survey of fertilizer Practice in showed that 82% of fields under temporary grass received fertilizer N and that, on average, treated fields received lb N/ac; for permanent grass the figures were less impressive, 57% of fields received N and the average amount Cited by: Grassland ecosystems are deeply affected by human activities and need appropriate management to optimise trade-offs between ecosystem functions and services.
Until now they have mainly been analysed as agro-ecosystems for animal production but this book looks beyond the role of grassland as a feeding ground, and evaluates other important processes such as carbon sequestration in soils.
Terrestrial ecosystem productivity is widely accepted to be nutrient limited1. Although nitrogen (N) is deemed a key determinant of aboveground net primary production (ANPP)2,3, the prevalence of Cited by: The role of grazing management for the net biome productivity and greenhouse gas budget (CO 2, N 2 O and CH 4) of semi-natural grassland Author links open overlay panel V.
Allard a J.-F. Soussana a R. Falcimagne a P. Berbigier b J.M. Bonnefond b E. Ceschia a 1 P. D’hour c C. Hénault d P. Laville e C. Martin f C. Pinarès-Patino fCited by: Arid regions are prone to drought because annual rainfall accumulation depends on a few rainfall events.
Natural plant communities are damaged by drought, but atmospheric nitrogen (N) deposition may enhance the recovery of plant productivity after drought. Here, we investigated the effect of increasing N deposition on post-drought recovery of grassland productivity in the Mongolian steppe, Cited by: Nitrogen management in grasslands in forage-based production systems - Role of biological nitrification inhibition (BNI) Article (PDF Available) in Tropical Grasslands January Grassland Productivity and Ecosystem Services - Ebook written by Gilles Lemaire.
Read this book using Google Play Books app on your PC, android, iOS devices. Download for offline reading, highlight, bookmark or take notes while you read Grassland Productivity and Ecosystem : Gilles Lemaire.
Nitrogen (N), the most critical and essential nutrient for plant growth, largely determines the productivity in both extensive and intensive grassland systems.
Dowdell R J, Morrison J and Hood A E M () The fate of fertilizer nitrogen applied to grassland: uptake by plants, immobilisation into soil organic matter and losses by leaching and denitrification. In Prins W H and Arnold G H, eds. The role of nitrogen in intensive grassland by: In addition, nitrogen balances are described for different grassland systems, showing how the annual inputs and outputs vary greatly depending on sward type and book is of interest to a wide readership, especially those engaged in research, teaching and advisory work, and students taking courses in agricultural and environmental.
The productivity of temperate grassland is limited by the response of plants to low temperature, affecting winter persistence and seasonal growth rates. During the winter, the growth of perennial grasses is restricted by a combination of low temperature and the lack of available light, but during early spring low ground temperature is the main Cited by: Data.
The analyses presented use data on net aboveground biomass production (gm −2 yr −1) of species from the experimental plots at each of the eight BIODEPTH fieldsites for the three main years of the project (Spehn et al.
).The data set comprises information on plots each containing between one and 32 species (and between one and three plant functioning groups, namely. Grassland, area in which the vegetation is dominated by a nearly continuous cover of grasses.
Grasslands occur in environments conducive to the growth of this plant cover but not to that of taller plants, particularly trees and shrubs. The factors preventing establishment of such taller, woody vegetation are varied. The role of different nitrogen forms in supporting productivity of North American grasslands.
North American grassland productivity increases with increasing precipitation from west to east. Where do plants get the nitrogen to support this productivity. We looked at the changing availability of extractable inorganic and organic nitrogen across.
The role of herbivores as agents that mainly regulate pyro‐volatile N losses is reinforced by the results of the sensitivity analysis. The latter shows that only a few parameters have strong effects on soil N and productivity, namely those that affect N inputs and outputs and those that regulate the recycling of plant N through the slow N by: Increased atmospheric nitrogen (N) deposition and altered precipitation regimes have profound impacts on ecosystem functioning in semiarid grasslands.
The Cited by: Discussion. Nitrogen limitation of primary production is widely distributed in various ecosystems increase in net primary production in response to the addition of a limiting nutrient is considered as the classic test of nutrient limitation in a particular ecosystem Across the two years in this study, N addition showed no significant effect on ANPP, indicating that N would not be the Cited by: Mean aboveground net primary productivity (ANPP, ± SE) averaged across all treatment years in 42 grasslands in the Nutrient Network with three or more years of treatment with factorial nitrogen (N), phosphorus (P), and potassium plus year 1 micronutrient (K +µ) Size: KB.
8) Managing C and N in grassland systems. The adaptive cycle theory perspective. 9) Managing mineral N leaching in grassland systems.
10) Greenhouse gas emission from grassland area and mitigation. 11) Role and impacts of legumes in grasslands for high productivity and N gain from symbiotic N2 : Gilles Lemaire.Drought influences pasture productivity with potentially severe impacts on livestock.
However, not all plant species are impacted equally indicating that plant community composition can be managed to improve resistance to drought. We conducted a plant-soil feedback (PSF) experiment to assess impacts of drought at the species and community : Kamrul Hassan, Yolima Carrillo, Uffe N.
Nielsen.Nutrient (nitrogen, phosphorus, sulfur, potassium, and calcium) dynamics and primary productivity were compared in adjacent sheep-grazed and ungrazed and adjacent subclover-seeded and unseeded annual grassland ecosystems.
Above-ground and belowground total plant biomass and nutrient concentrations were measured monthly for two years, and nutrient content of various ecosystem components .