Accumulation and release of organic phosphorus (P) from legacy P-affected soils to adjacent drainage water

2022 ◽  
Author(s):  
Suwei Xu ◽  
Nicolas F. Martin ◽  
Jeffrey W. Matthews ◽  
Yuji Arai
Keyword(s):  
Organic Phosphorus ◽  
Drainage Water

NITROGEN CYCLES IN CROP ROTATIONS DIFFERING IN FERTILIZATION

2015 ◽  
Author(s):  
Saulius GUŽYS ◽  
Stefanija MISEVIČIENĖ
Keyword(s):  
Crop Rotation ◽  
Soil Nitrogen ◽  
Nitrogen Fertilizer ◽  
Nitrogen Balance ◽  
Mineral Soil ◽  
Crop Productivity ◽  
Drainage Water ◽  
Perennial Grasses ◽  
Crop Rotations ◽  
Cereal Crop

The use of nitrogen fertilizer is becoming a global problem; however continuous fertilization with nitrogen ensures large and constant harvests. An 8 year research (2006–2013) was conducted to evaluate the relationships between differently fertilized cultivated plant rotations. The research was conducted in Lipliunai (Lithuania) in the agroecosystem with nitrogen metabolism in fields with deeper carbonaceous soil, i.e. Endocalcari Endohypogleyic Cambisol (CMg-n-w-can). The research area covered three drained plots where crop rotation of differently fertilized cereals and perennial grasses was applied. Samples of soil, water and plants were investigated in the Chemical Analysis Laboratory of the Aleksandras Stulginskis University certified by the Environment Ministry of the Republic of Lithuania. The greatest productivity was found in a crop rotation with higher fertilization (N32-140). In crop rotation with lower fertilization (N24-90) productivity of cereals and perennial grasses (N0-80) was 11–35 % lower. The highest amount of mineral soil nitrogen was found in cereal crop rotation with higher fertilization. It was influenced by fertilization and crop productivity. The lowest Nmin and Ntotal concentrations in drainage water were found in grasses crop rotation. Crop rotations of differently fertilized cereals increased nitrogen concentration in drainage water. Nmin concentration in water depended on crop productivity, quantity of mineral soil nitrogen, fertilization, and nitrogen balance. The lowest nitrogen leaching was found in the crop rotation of grasses. Cereal crop rotation increased nitrogen leaching by 12–42 %. The usage of all crop rotations resulted in a negative nitrogen balance, which essentially depended on fertilization with nitrogen fertilizer.

Impact of Drainage Water Management on Crop Yield

2013 ◽  
Author(s):  
Matt Helmers ◽  
Xiaobo Zhou ◽  
Carl Pederson ◽  
Greg Brenneman
Keyword(s):  
Water Management ◽  
Crop Yield ◽  
Drainage Water ◽  
Drainage Water Management

Evaluation of Hematological and Biochemical Changes in Dromedary Camel during the Different Stages of Lactation

2020 ◽  
Vol 21 (3) ◽  
pp. 121-124
Author(s):  
Ahmed El-Sayed
Keyword(s):  
Organic Phosphorus ◽  
Hemoglobin Concentration ◽  
Controlled Study ◽  
Mean Corpuscular Hemoglobin ◽  
Dromedary Camel ◽  
Gamma Glutamyl Transferase ◽  
Corpuscular Hemoglobin ◽  
Stage Of Lactation ◽  
Group 2 ◽  
Glutamyl Transferase

Objective: To assess the potential hematobiochemical alterations in healthy dromedary camel during the different stages of lactation. Design: Randomized controlled study. Animals: Fifteen healthy female dromedary camels, with mean body weight of 499.6 kg and mean age of 20 years. Procedures: Camels were categorized into 3 groups' according to their stage of lactation: group 1, early lactation (1-3 months), group 2, mid-lactation (four-6 months) and group3, late lactation (≥ 7 months). Blood samples were collected from every animals for hematological and biochemical evaluation. Results: Total erythrocyte count (TEC), hemoglobin (Hb), mean corpuscular volume (MCV), mean corpuscular hemoglobin (MCH), total leukocytes (TLC), lymphocytes, neutrophils, monocytes, Calcium, glucose, aspartate aminotransferase (AST), alanine transaminase (ALT), gamma glutamyl transferase (GGT) and alkaline phosphatase (ALP) confirmed significant (p < 0.05) variation between different stages of lactation. However, non-notable (p > 0.05) dissimilarity were located in packed cell volume (PCV), mean corpuscular hemoglobin concentration (MCHC), in organic phosphorus (P), magnesium (Mg), cholesterol, total protein (TP), albumen, globulin, blood urea nitrogen (BUN) and creatinine kinase (CK) in the course of different ranges of lactation, Conclusion and clinical relevance: The results of this investigation may be useful as reference guide for dromedary camel to evaluate the metabolic health status at different stages of lactation.

Sign in / Sign up

Export Citation Format

Share Document