搜索结果: 1-15 共查到“知识库 生物学 Nitrogen”相关记录48条 . 查询时间(0.187 秒)
Organic matter and crude protein digestibility predicted from nitrogen and fibre fractionation of festulolium hybrids
nitrogen fractions Cornell system nutritive value ruminant
2018/11/23
The objectives of the experiment were to study nitrogen fractions of the Cornell Net Carbohydrate and Protein System (CNCPS) and digestibility of organic matter (OMD) and crude protein (CPD) along wit...
Effect of L- or DL-methionine Supplementation on Nitrogen Retention, Serum Amino Acid Concentrations and Blood Metabolites Profile in Starter Pigs
Amino Acids Profile Methionine Pigs Nitrogen Balance
2016/5/20
The objective of the current study was to evaluate the effect of supplementation of either L-methionine (L-Met) or DL-methionine (DL-Met) to diets of starter pigs on nitrogen (N) balance, metabolism, ...
Controlling eutrophication: nitrogen and phosphorus
Controlling eutrophication nitrogen phosphorus
2016/5/18
The need to reduce anthropogenic nutrient
inputs to aquatic ecosystems in
order to protect drinking-water supplies
and to reduce eutrophication, including
the proliferation of harmful algal blooms...
Nitrogen degradability and intestinal digestibility of rumen undegraded protein in rapeseed, rapeseed meal and extracted rapeseed meal
rapeseed rapeseed meal extracted rapeseed meal ruminant protein amino acids degradability intestinal digestibility
2015/6/4
In this study, nutritive values of rapeseed (R), rapeseed meal-expeller A (RM-A), rapeseed meal-expeller B (RM-B) and extracted rapeseed meal (ERM) were compared. The trials were performed using the i...
Nitrogen Removal from Milking Center Wastewater via Simultaneous Nitrification and Denitrification Using a Biofilm Filtration Reactor
Nitrogen Loading Rate Simultaneous Nitrification and Denitrification
2016/5/18
Milking center wastewater (MCW) has a relatively low ratio of carbon to nitrogen (C/N ratio), which should be separately managed from livestock manure due to the negative impacts of manure nutrients a...
Rumen Degradability and Post-ruminal Digestion of Dry Matter, Nitrogen and Amino Acids of Three Protein Supplements
Ruminal Degradability Intestinal Digestibility Protein Supplement Amino Acids
2016/5/18
This study evaluated the in situ ruminal degradability, and subsequent small intestinal digestibility (SID) of dry matter, crude protein (CP), and amino acids (AA) of cottonseed meal (CSM), sunflower ...
Variation in nitrogen economy of two Stipa species in the semiarid region of northern China
Habitat preference Mean residence time Nitrogen-use efficiency Nitrogen productivity Plant strategies
2015/2/5
How effectively plants utilize nitrogen (N), the most limiting nutrient in natural ecosystems, will largely determine the success of plants in intra- and inter-specific competition. Theory suggests th...
Nitrogen deposition mediates the effects and importance of chance in changing biodiversity
community structure ecological drift immigration natural selection neutral theory niche theory
2015/2/4
Nitrogen deposition is changing biodiversity on Earth. We need to understand the underlying mechanisms to conserve biodiversity better. Both selection and chance are potential mechanisms, and they may...
Tradeoffs and thresholds in the effects of nitrogen addition on biodiversity and ecosystem functioning: evidence from inner Mongolia Grasslands
aboveground biomass ecological restoration ecosystem management Eurasia steppe nitrogen enrichment plant functional group composition species richness
2015/2/4
Nitrogen (N) deposition is widely considered an environmental problem that leads to biodiversity loss and reduced ecosystem resilience; but, N fertilization has also been used as a management tool for...
Microbial communities involved in the nitrogen cycle at the soil aggregate scale
Soil structure soil microbial community microbial community the aggregation structure and soil
2015/1/28
We present research aimed at determining the role of soil structure in the organization of microbial communities in soil. We have focused on the microbial communities involved in functional roles with...
Universidade de Sao Paulo Centro de Energia Nuclear na Agricultura: Soil microbiota related to carbon, nitrogen and greenhouse gas cycles across different land uses in Southwestern Amazonia
Biological sciences Earth sciences Soil microbiota Amazonia Biogeochemical cycles Gene abundance Land use change
2015/1/28
Sustainability is one of the biggest goals of humankind in the new millennium. An increasing global demand on agricultural products stimulates agricultural expansion in Brazil, especially in the South...
Cultivation of Brassica pekinensis under different forms of nitrogen nutrition
Brassica pekinensis NPK nutrition
2015/1/20
A pot trial was aimed to investigate the effect of different forms of nitrogen fertilizer on the aboveground phytomass yield, vitamin C content and uptake of some macroelements by Brassica pekinensis....
Site Characteristics and Plant Invasion: Light Limitation of Invasive Establishment and Impacts of Elaeagnus Umbellata on Soil Nitrogen Availability and Co-occurring Species
soil nitrogen invasion facilitation
2015/1/6
Invasive species have become an increasing threat to many habitats worldwide. This research addressed the questions of whether several invasive woody plants can germinate, survive and grow in light le...
Ileal Endogenous Amino Acid Flow Response to Nitrogen-free Diets with Differing Ratios of Corn Starch to Dextrose in Pigs
Ileal Digestibility Basal Endogenous Amino Acid Loss Swine
2016/5/17
The objective of this study was to determine the responses in the digestibility of dry matter (DM) and amino acid (AA) composition of ileal endogenous flow (IEF) of pigs (initial body weight, 69.1±6.4...
Effects of Dietary Electrolyte Balance on Growth Performance, Nitrogen Metabolism and Some Blood Biochemical Parameters of Growing Rabbits
Dietary Electrolyte Balance Growing Rabbit Growth Performance Nitrogen Metabolism
2016/5/16
The effects of different dietary electrolyte balance (DEB) on growth performance, nitrogen (N) metabolism and some blood biochemical parameters were investigated in 2 to 3 months old growing rabbits. ...