scholarly journals Effects of Drainage on Greenhouse Gas Emissions and Yields of Lowland Rice-Wheat Rotation System in East China

2021 ◽  
Author(s):  
Hao He ◽  
Dandan Li ◽  
Ze Wu ◽  
Tiancheng Zhang ◽  
Feifan Pan ◽  
...  
Keyword(s):  
Ghg Emissions ◽  
Organic Matter Content ◽  
Atmospheric Temperature ◽  
Matter Content ◽  
East China ◽  
Control Group ◽  
Emission Flux ◽  
Rotation System ◽  
Rice Season ◽  
Set Up

Abstract The subtropical region of East China is characterized by abundant water and temperature resources conducive to crop cultivation, and large areas of lowland have been widely used for agricultural planting. To explore the feasible methods of greenhouse gases (GHGs) reduction for rice-wheat rotation system, shallow ditch (SD) and deep ditch (DD) treatments in the wheat season were set up for drainage to control the water content in soil, with the conventional non-ditching treatment as the control group (CG). Results showed that methane (CH4) emissions from paddy soil were in the majority in global warming potential (GWP) in rice-wheat rotation system. In the three years, compared with that of CG, the CH4 cumulative emissions of SD and DD were reduced by 65.80% and 63.42% (rice season), and 101.37% and 77.28% (wheat season), respectively; the nitrous oxide (N2O) cumulative emissions of SD and DD were reduced by 27.62% and 11.30% (rice season), and 1.53% and -37.40% (wheat season), respectively; the total GWP produced by SD and DD in the three years was reduced by 58.78% and 52.22%, respectively; GHG emission intensity (GHGI) of SD and DD declined by 60.67% and 53.85%, respectively; the CH4 emission flux was significantly positively correlated with atmospheric temperature and 5 cm ground temperature, but negatively correlated with soil Eh; when the soil Eh value was lower than -150 mV, the CH4 emission flux increased significantly, indicating that -150 mV was the key soil Eh value for CH4 emissions in this area; in addition, both SD and DD led to markedly decrease in soil organic matter content and an increase in soil pH. The findings indicate that SD and DD not only ensure stably increasing production, but also effectively reduce GHG emissions.

scholarly journals The Effect of Inoculation With Amycolatopsis Strains On Yield and Nutrient Content of Wheat (Triticum Aestivum L.) and Soil Microbiological Properties

2021 ◽  
Author(s):  
Maira Kussainova ◽  
Rıdvan Kızılkaya
Keyword(s):  
Triticum Aestivum ◽  
Organic Matter ◽  
Soil Organic Matter ◽  
Wheat Yield ◽  
Organic Matter Content ◽  
Nutrient Content ◽  
Matter Content ◽  
Control Group ◽  
Soil Organic Matter Content ◽  
Microbiological Properties

Abstract In this study, the yield and nutrient content of wheat (Triticum aestivum L.) grown in greenhouse conditions and soil microbiological properties were investigated. Inoculating Amycolatopsis strains, including A.magusensis DSM 45510T, A.orientalis DSM 40040T, and A.azurea DSM 43854T was considered. The mixture of wheat straw (WS) was used to increase soil organic matter content by 5%. It was determined that the grain and straw yield of wheat increased significantly (P < 0.001) in inoculation with Amycolatopsis strains in soils without WS. However, inoculation with Amycolatopsis strains in soil with WS significantly decreased grain and straw of wheat yield. Also, it was found that soil microbial biomass and soil basal respiration (SBR) increased in inoculation with Amycolatopsis strains in both soils with and without WS. While it was established that Cmic:Corg ratio of the control group in the soil samples at the end of the harvest was 1.23, infusing with Amycolatopsis strains was observed to be around 2.95–3.31. Moreover, inoculation with Amycolatopsis strains in soils with WS varied between 0.32–0.40. In the same way, it was determined the microbial metabolic quotient (qCO2) was 2.58 in the control group. This meaning was between 5.67–5.82 in infusing with Amycolatopsis strains and 6.04–6.41 in inoculating with Amycolatopsis strains in soils mixed with ground wheat stalk. As a result, it suggested that the yield of wheat could be increased inoculation with A.magusensis, A.orientalis, and A.azurea, from Amycolatopsis strains, in soils with low soil organic matter content and soils that cannot be shown an increment in terms of organic matter content.

scholarly journals Influence of Aerobic Pretreatment of Poultry Manure on the Biogas Production Process

Processes ◽  
2020 ◽  
Vol 8 (9) ◽  
pp. 1109
Author(s):  
Mantas Rubežius ◽  
Kęstutis Venslauskas ◽  
Kęstutis Navickas ◽  
Rolandas Bleizgys
Keyword(s):  
Production Process ◽  
Biogas Production ◽  
Organic Matter Content ◽  
Poultry Manure ◽  
Treatment Method ◽  
Matter Content ◽  
Control Group ◽  
Biogas Yield ◽  
High Concentrations ◽  
Positive Effect

Anaerobic digestion of poultry manure is a potentially-sustainable means of stabilizing this waste while generating biogas. However, technical, and environmental protection challenges remain, including high concentrations of ammonia, low C/N ratios, limited digestibility of bedding, and questions about transformation of nutrients during digestion. This study evaluated the effect of primary biological treatment of poultry manure on the biogas production process and reduction of ammonia emissions. Biogas yield from organic matter content in the aerobic pretreatment groups was 13.96% higher than that of the control group. Biogas production analysis showed that aerobic pretreatment of poultry manure has a positive effect on biogas composition; methane concentration increases by 6.94–7.97% after pretreatment. In comparison with the control group, NH3 emissions after aerobic pretreatment decreased from 3.37% (aerobic pretreatment without biological additives) to 33.89% (aerobic pretreatment with biological additives), depending on treatment method.

scholarly journals Greenhouse Gas Emissions as Affected by Fertilization Type (Pig Slurry vs. Mineral) and Soil Management in Mediterranean Rice Systems

Agronomy ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 493
Author(s):  
Beatriz Moreno-García ◽  
Mónica Guillén ◽  
Dolores Quílez
Keyword(s):  
Nitrous Oxide ◽  
Organic Matter ◽  
Greenhouse Gas ◽  
Great Increase ◽  
Ghg Emissions ◽  
Organic Matter Content ◽  
Mineral Fertilizer ◽  
Matter Content ◽  
Pig Slurry ◽  
Mineral N

The great increase in livestock production in some European areas makes it necessary to recycle organic slurries and manures and to integrate them in crop production. In Northeast Spain, the application of pig slurry (PS) is being extended to alternative crops such as rice due to the great increase in pig production. However, there is a lack of information of the effect of substitution of synthetic fertilizers with pig slurry on greenhouse gas (GHG) emissions in rice crop, and this information is key for the sustainability of these agricultural systems. The aim of this study was to evaluate the effect of the substitution of mineral fertilizers by PS on GHG emissions in Mediterranean flooded rice cultivation conditions under optimal nitrogen (N) fertilization. Two field experiments were carried out in two different (contrasting) soil types with different land management. Site 1 had been cultivated for rice in the previous three years with no puddling practices. Site 2 had been cultivated for rice for more than 15 years with puddling tillage practices and had higher organic matter content than site 1. The cumulative nitrous oxide emissions during the crop season were negative at both sites, corroborating that under flooded conditions, methane is the main contributor to global warming potential rather than nitrous oxide. The substitution of mineral fertilizer with PS before seeding at the same N rate did not increase emissions in both sites. However, at site 1 (soil with lower organic matter content), the higher PS rate applied before seeding (170 kg N ha−1) increased methane emissions compared to the treatments with lower PS rate and mineral fertilizer before seeding (120 kg N ha−1) and complemented with topdressing mineral N. Thus, a sustainable strategy for inclusion of PS in rice fertilization is the application of moderate PS rates before seeding (≈120 kg N ha−1) complemented with mineral N topdressing.

scholarly journals Effects of Alkali-Activated Algae Biochar on Soil Improvement after Phosphorus Absorption: Efficiency and Mechanism

2021 ◽  
Vol 13 (21) ◽  
pp. 11973
Author(s):  
Yan-Ning Liu ◽  
Li-Yuan He
Keyword(s):  
Phosphorus Content ◽  
Organic Matter Content ◽  
Soil Improvement ◽  
Absorption Efficiency ◽  
Exchange Capacity ◽  
Matter Content ◽  
Control Group ◽  
Maximum Adsorption Capacity ◽  
Modified Biochar ◽  
Phosphorus Absorption

Biochar is often used for the removal of phosphorus in wastewater. However, the improper treatment of adsorbed biochar might cause secondary pollution. In order to promote the recycling and harmless utilization of biochar with adsorbed phosphorus, a new modified biochar (ABC) was prepared from cyanobacteria in this study. The maximum adsorption capacity of ABC calculated from the Langmuir isotherm model was 38.17 mg·g−1. ABC was used to absorb phosphorus in wastewater, whose product (ABC/P) was used for soil improvement and soybean cultivation. The results showed that adding the proper amount of ABC/P could significantly increase the pH of the soil (from 6.52 ± 0.04 to 7.49 ± 0.08), organic matter content (from 34.02 ± 0.41 to 47.05 ± 0.14 g·kg−1), cation exchange capacity (from 3.01 ± 0.18 to 3.76 ± 0.07 cmol·kg−1), water-holding capacity (from 28.78 ± 0.34 to 35.03 ± 0.31%), effective phosphorus content, and total phosphorus content. Meanwhile, the soil alkaline phosphatase activity was improved. The plant height, root length, and fresh quality were promoted by planting soybeans in ABC/P-improved soil and were better than those of the control group. Therefore, ABC/P, as a new type of phosphorus fertilizer, has the potential for soil amendment for legume crops.

scholarly journals Potential effects of vinasse as a soil amendment to control runoff and soil loss

SOIL ◽  
2016 ◽  
Vol 2 (1) ◽  
pp. 71-78 ◽  
Author(s):  
Z. Hazbavi ◽  
S. H. R. Sadeghi
Keyword(s):  
Organic Matter ◽  
Soil Loss ◽  
Soil Amendment ◽  
Organic Matter Content ◽  
Matter Content ◽  
Soil Restoration ◽  
Simulated Rainfall ◽  
Set Up ◽  
Loss Control ◽  
Runoff And Soil Loss

Abstract. Application of organic materials are well known as environmental practices in soil restoration, preserving soil organic matter and recovering degraded soils of arid and semiarid lands. Therefore, the present research focused on evaluating the effectiveness of vinasse, a byproduct mainly of the sugar-ethanol industry, on soil conservation under simulated rainfall. Vinasse can be recycled as a soil amendment due to its organic matter content. Accordingly, the laboratory experiments were conducted by using 0.25 m2 experimental plots at 20 % slope and rainfall intensity of 72 mm h−1 with 0.5 h duration. The effect of vinasse was investigated on runoff and soil loss control. Experiments were set up as a control (with no amendment) and three treated plots with doses of 0.5, 1, and 1.5 L m−2 of vinasse subjected to simulated rainfall. Laboratory results indicated that vinasse at different levels could not significantly (P >  0.05) decrease the runoff amount and soil loss rate in the study plots compared to untreated plots. The average amounts of minimum runoff volume and soil loss were about 3985 mL and 46 g for the study plot at a 1 L m−2 level of vinasse application.

scholarly journals Temperature increase affects acetate-derived methane production in Alaskan lake sediments and wetland soils

2021 ◽  
Author(s):  
BM Dellagnezze ◽  
P. Bovio-Winkler ◽  
C. Lavergne ◽  
D.A. Menoni ◽  
F. Mosquillo ◽  
...  
Keyword(s):  
Lake Sediments ◽  
Methane Production ◽  
Global Climate ◽  
Ghg Emissions ◽  
Organic Matter Content ◽  
Matter Content ◽  
The Arctic ◽  
Wetland Soils ◽  
Increasing Temperature ◽  
The Impact

AbstractUnder climate change framework, methanogens activity is expected to be strongly affected, eventually resulting in positive feedback on global climate, with higher greenhouse gas (GHG) emissions in the Arctic. This work aimed to evaluate the effect of increasing temperature on methane production rate and archaeal community of lake sediments and wetland soils from Denali to Toolik regions in Alaska (USA). For that, anaerobic acetate-amended microcosms were incubated at 5, 10, 15 and 20 °C. The acetate-derived methanogenic rate was determined and the methanogenic communities were analyzed by qPCR and 16S rRNA sequencing. Warmer temperatures yielded 4-6 times higher methane production rates and organic matter content (OM) showed significant positive correlation to methane production. Different patterns were observed in the archaeal communities after incubation at higher temperatures, with an increase in Methanosarcina abundance for most of the samples and Methanosaeta in one of the lakes tested, showing the adaptation of key acetoclastic groups among different temperatures. Our results demonstrate the impact of increasing temperature on methane production, bringing insights on key drivers involved in the process of acetoclastic methanogenic potential occurring in these ecosystems in Alaska.

scholarly journals Food value of some populations of Algerian annual alfalfa

2020 ◽  
Vol 43.2 ◽  
pp. 7428-7440
Author(s):  
F Alane ◽  
R Chabaca ◽  
A Abdelguerfi
Keyword(s):  
Dry Matter ◽  
Organic Matter Content ◽  
Matter Content ◽  
Agricultural Area ◽  
Positive Sign ◽  
Neutral Detergent Fibre ◽  
Rotation System ◽  
Acid Detergent Fibre ◽  
Area Use ◽  
Food Value

Fodder grown in Algeria occupies 20% of the total UAA (agricultural area use) of the country. They are dominated by so-called "dry" fodder. The conversion of northern fallow land and steppe to self-regenerating legumes in an annual Cereal / Medicago rotation system may increase it. At the early flowering stage, the results indicate that the mineral content of the annual alfalfa is consistent; it varies from 9 to 14% of the DM (Dry matter). The species M. truncatula (Tr238) has the highest value (18%), which decreases the organic matter content. The nitrogen content is high with a maximum of 29% M ciliaris(S5) and a minimum of 20% M. intertexta (I107): the M. ciliaris species is the best provided in MAT (total nitrogenous matter) with an average of 27% against M. intertexta: 23 %. The highest NDF (neutral detergent fibre) content, 46% of the MS (dry matter) is recruited among M. intertexta (I253) quite logically, ADF (acid detergent fibre) and ADL (lignin) follow with 21 and 9% as respective maximas for all populations. However, on average, the ADL content is only 5% with a minimum of 2.6% for C2 M. ciliaris. It is interesting to note, the positive sign of the correlation between factors N. of Rods / m² and ADF: the amount of DM (thus indirectly lignin) increases in parallel with the age of the plant, as NDF and ADF. Considered first by test, the recorded digestibility values are equal to or greater than 70%: 75; 73; 74; 79 (respectively for tests 1 to 4) and on average, 75%. The average digestibility per species is 77; 73 and 75% for M ciliaris, M truncatula and M intertexta. Variations between populations and species are low: 3.4 and 3.1% respectively. The 20 or so populations of local annual alfalfa studied showed a great genetic variability of the studied parameters, which constitutes an important genetic capital in which the breeder could draw at leisure. Abbreviations: MAT, total nitrogenous matter ;ADF, acid detergent fibre; DM, dry matter; UAA, agricultural area use,; NDF, neutral detergent fibre ; N. of Rods / m² ,Number of Rods / m².

HEAVY METAL SPECIATION IN BOTTOM SEDIMENTS OF THE VYSHNEVOLOTSKY RESERVOIR

2018 ◽  
pp. 46-54
Author(s):  
O. A. Lipatnikova
Keyword(s):  
Heavy Metal ◽  
Organic Matter ◽  
Bottom Sediments ◽  
Metal Speciation ◽  
Organic Matter Content ◽  
Water Reservoir ◽  
Matter Content ◽  
Heavy Metal Speciation ◽  
Mobile Forms ◽  
Manganese Hydroxides

The study of heavy metal speciation in bottom sediments of the Vyshnevolotsky water reservoir is presented in this paper. Sequential selective procedure was used to determine the heavy metal speciation in bottom sediments and thermodynamic calculation — to determine ones in interstitial water. It has been shown that Mn are mainly presented in exchangeable and carbonate forms; for Fe, Zn, Pb и Co the forms are related to iron and manganese hydroxides is played an important role; and Cu and Ni are mainly associated with organic matter. In interstitial waters the main forms of heavy metal speciation are free ions for Zn, Ni, Co and Cd, carbonate complexes for Pb, fulvate complexes for Cu. Effects of particle size and organic matter content in sediments on distribution of mobile and potentially mobile forms of toxic elements have been revealed.

Physico-Chemical Properties of Soil Collected from Chandrabhaga River in Kalmeshwar, Nagpur, Maharashtra

2020 ◽  
Vol 07 (02) ◽  
pp. 1-3
Author(s):  
Amita M Watkar ◽  
Keyword(s):  
Organic Matter ◽  
Soil Quality ◽  
Agricultural Land ◽  
Organic Matter Content ◽  
Chemical Properties ◽  
Matter Content ◽  
Soil Attributes ◽  
Essential Components ◽  
Agricultural Land Management ◽  
Physical And Chemical

Soil, itself means Soul of Infinite Life. Soil is the naturally occurring unconsolidated or loose covering on the earth’s surface. Physical properties depend upon the amount, size, shape, arrangement, and mineral composition of soil particles. It also depends on the organic matter content and pore spaces. Chemical properties depend on the Inorganic and organic matter present in the soil. Soils are the essential components of the environment and foundation resources for nearly all types of land use, besides being the most important component of sustainable agriculture. Therefore, assessment of soil quality and its direction of change with time is an ideal and primary indicator of sustainable agricultural land management. Soil quality indicators refer to measurable soil attributes that influence the capacity of a soil to function, within the limits imposed by the ecosystem, to preserve biological productivity and environmental quality and promote plant, animal and human health. The present study is to assess these soil attributes such as physical and chemical properties season-wise.

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