Catchment soil characteristics predict organic carbon, nitrogen, and phosphorus levels in temperate lakes

2021 ◽  
Author(s):  
Margot Sepp ◽  
Toomas Kõiv ◽  
Peeter Nõges ◽  
Tiina Nõges ◽  
Silvia Newell ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Soil Characteristics ◽  
Temperate Lakes ◽  
Nitrogen And Phosphorus ◽  
Phosphorus Levels

scholarly journals Amendment of organic compost proprieties through composting-vermicomposting integration

2021 ◽  
Vol 19 (1) ◽  
pp. 01-16
Author(s):  
Vanessa Maronezi ◽  
Ana Paula Pereira Assunção ◽  
Vanessa Souza Reis Melo ◽  
Ana Paula Milla Dos Santos Senhuk ◽  
Deusmaque Carneiro Ferreira ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Organic Waste ◽  
Organic Fraction ◽  
Growth Data ◽  
Nitrogen And Phosphorus ◽  
Brachiaria Decumbens ◽  
Cooked Food ◽  
Growth Experiments ◽  
Organic Compost ◽  
Phosphorus Levels

The aim of the current study is to evaluate the effects of integrating composting-vermicomposting to improve the organic compost as from the physicochemical analyses and by their application on Brachiaria decumbens growth. Experiments carried out in composting unit used 30:1 ratio of nitrogen-rich organic waste (raw vegetables, fruits and cooked food) and carbon (dry grass) in 2 pile configurations (with, or without passive aeration). After 60 days, product was subjected to vermicomposting for 45 days. Composts were analyzed to check their quality (temperature, pH, moisture, organic carbon, nitrogen and phosphorus levels), as well as compared to each other as biofertilizers (10% (w/v)) for B. decumbens growth. Data have suggested that the vermicomposting process improved the compost pile by increasing its nitrogen (1.26% to 1.95%), phosphorus (0.64% to 1.2%) and organic carbon contents (17.1% to 18.9%). B. decumbens growth showed no significant differences between those treatments, which indicates that organic fraction should be increased (>10%) to release their nutrients to plant.  

Soil Organic Carbon, Nitrogen, and Phosphorus Levels and Stocks After Long-Term Nitrogen Fertilization

2015 ◽  
Vol 43 (11) ◽  
pp. 1538-1546 ◽  
Author(s):  
Yangquanwei Zhong ◽  
Weiming Yan ◽  
Zhouping Shangguan
Keyword(s):  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Nitrogen Fertilization ◽  
Nitrogen And Phosphorus ◽  
Phosphorus Levels

scholarly journals Nitrogen and Phosphorus Addition to Soil Improves Seed Yield, Foliar Stomatal Conductance, and the Photosynthetic Response of Rapeseed (Brassica napus L.)

Agriculture ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 483
Author(s):  
Esmaeil Zangani ◽  
Kamran Afsahi ◽  
Farid Shekari ◽  
Eileen Mac Sweeney ◽  
Andrea Mastinu
Keyword(s):  
Stomatal Conductance ◽  
Quantum Yield ◽  
Photosystem Ii ◽  
Chlorophyll Content ◽  
Seed Yield ◽  
Nitrogen Application ◽  
Flowering Stage ◽  
Nitrogen And Phosphorus ◽  
Brassica Napus L ◽  
Phosphorus Levels

The effects of nitrogen and phosphorus levels on the physiological traits, yield, and seed yield of rapeseed (Brassica napus L.), were studied in a farm research project of Zanjan University. Three levels of nitrogen (0, 100, and 200 kg/ha) and three levels of phosphorus (0, 75, and 150 kg/ha) were considered. The results showed that an increase in nitrogen level caused an increase in the leaf chlorophyll content so that the application of 200 kg/ha of nitrogen increased the chlorophyll content of the leaves until the mid-grain filling stage. Nitrogen application lowered leaf stomatal conductance in the early flowering stage whereas the stomatal conductance was increased during the late flowering stage. Nitrogen application (100 and 200 kg/ha) also increased the quantum yield of photosystem II. On the other hand, with the application of 150 kg/ha and 75 kg/ha of phosphorus, the leaf stomatal conductance and the quantum yield of photosystem II in the early flowering stage increased respectively. The results showed that the application of 200 kg/ha of nitrogen and 75 kg/ha of phosphorus significantly increased seed and oil yield compared to the control. In addition, the number of siliques per plant and the weight of 1000 seeds showed an increasing trend that was affected by nitrogen and phosphorus levels. This study demonstrated that nitrogen enhanced the chlorophyll content, leaf area, and consequently, the quantum yield of photosystem II. Nitrogen also augmented the seed filling duration, seed yield, and oil yield by increasing gas exchange. As a result, the application of 100 kg/ha of nitrogen together with 75 kg/ha phosphorus showed the greatest effect on the qualitative and quantitative yield of rapeseed. However, the application of 200 kg/ha of nitrogen alone or in combination with different levels of phosphorus did not significantly increase many of the studied traits.

Responses of microbial activity to carbon, nitrogen, and phosphorus additions in forest mineral soils differing in organic carbon content

2021 ◽  
Vol 57 (4) ◽  
pp. 513-521
Author(s):  
Veronika Jílková ◽  
Kateřina Jandová ◽  
Jaroslav Kukla
Keyword(s):  
Organic Carbon ◽  
Carbon Content ◽  
Microbial Activity ◽  
Organic Carbon Content ◽  
Nitrogen And Phosphorus ◽  
Mineral Soils

scholarly journals Global Landscape of Total Organic Carbon, Nitrogen and Phosphorus in Lake Water

2015 ◽  
Vol 5 (1) ◽  
Author(s):  
Ming Chen ◽  
Guangming Zeng ◽  
Jiachao Zhang ◽  
Piao Xu ◽  
Anwei Chen ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Total Organic Carbon ◽  
Lake Water ◽  
Nitrogen And Phosphorus

Spatial variations in soil organic carbon, nitrogen and phosphorus concentrations related to stand characteristics in subtropical areas

2016 ◽  
Vol 413 (1-2) ◽  
pp. 289-301 ◽  
Author(s):  
Fang Jiang ◽  
Xiaohong Wu ◽  
Wenhua Xiang ◽  
Xi Fang ◽  
Yeling Zeng ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Spatial Variations ◽  
Nitrogen And Phosphorus ◽  
Stand Characteristics

Estimation of soil organic carbon, nitrogen, and phosphorus losses induced by wind erosion in Northern China

2019 ◽  
Vol 30 (8) ◽  
pp. 1006-1022 ◽  
Author(s):  
Heqiang Du ◽  
Tao Wang ◽  
Xian Xue ◽  
Sen Li
Keyword(s):  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Wind Erosion ◽  
Northern China ◽  
Nitrogen And Phosphorus ◽  
Phosphorus Losses

Carbon, nitrogen and phosphorus storage in subtropical seagrass meadows: examples from Florida Bay and Shark Bay

2012 ◽  
Vol 63 (11) ◽  
pp. 967 ◽  
Author(s):  
James W. Fourqurean ◽  
Gary A. Kendrick ◽  
Laurel S. Collins ◽  
Randolph M. Chambers ◽  
Mathew A. Vanderklift
Keyword(s):  
Organic Carbon ◽  
Carbon Content ◽  
Primary Productivity ◽  
Florida Bay ◽  
Organic Carbon Content ◽  
Nitrogen And Phosphorus ◽  
Organic C ◽  
Shark Bay ◽  
Seagrass Meadows ◽  
C Storage

Seagrass meadows in Florida Bay and Shark Bay contain substantial stores of both organic carbon and nutrients. Soils from both systems are predominantly calcium carbonate, with an average of 82.1% CaCO3 in Florida Bay compared with 71.3% in Shark Bay. Soils from Shark Bay had, on average, 21% higher organic carbon content and 35% higher phosphorus content than Florida Bay. Further, soils from Shark Bay had lower mean dry bulk density (0.78 ± 0.01 g mL–1) than those from Florida Bay (0.84 ± 0.02 mg mL–1). The most hypersaline regions of both bays had higher organic carbon content in surficial soils. Profiles of organic carbon and phosphorus from Florida Bay indicate that this system has experienced an increase in P delivery and primary productivity over the last century; in contrast, decreasing organic carbon and phosphorus with depth in the soil profiles in Shark Bay point to a decrease in phosphorus delivery and primary productivity over the last 1000 y. The total ecosystem stocks of stored organic C in Florida Bay averages 163.5 MgCorg ha–1, lower than the average of 243.0 MgCorg ha–1 for Shark Bay; but these values place Shark and Florida Bays among the global hotspots for organic C storage in coastal ecosystems.

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