Response of regional agricultural soil phosphorus status to net anthropogenic phosphorus input (NAPI) determined by soil pH value and organic matter content in subtropical China

Chemosphere ◽  
2018 ◽  
Vol 200 ◽  
pp. 487-494 ◽  
Author(s):  
Cen Meng ◽  
Huanyao Liu ◽  
Yi Wang ◽  
Yuyuan Li ◽  
Jiaogen Zhou ◽  
...  
Keyword(s):  
Organic Matter ◽  
Soil Ph ◽  
Agricultural Soil ◽  
Ph Value ◽  
Soil Phosphorus ◽  
Organic Matter Content ◽  
Matter Content ◽  
Subtropical China ◽  
Phosphorus Status

scholarly journals Soil pH and Nutrient Characteristics of Newly-added Cultivated Land in Heyang, China

2020 ◽  
Vol 204 ◽  
pp. 01013
Author(s):  
Gang Li ◽  
Ruiqing Zhang ◽  
Ying Wang ◽  
Nan Lu ◽  
Yang Wei ◽  
...  
Keyword(s):  
Organic Matter ◽  
Soil Organic Matter ◽  
Total Nitrogen ◽  
Soil Ph ◽  
Ph Value ◽  
Organic Matter Content ◽  
Matter Content ◽  
Available Phosphorus ◽  
Cultivated Land ◽  
Soil Available Phosphorus

In order to understand the soil pH and main nutrient characteristics of newly added cultivated land in the eastern part of Guanzhong, and 160 soil samples were collected in 2016, the soil pH, organic matter, total nitrogen, available phosphorus and available potassium in Heyang County were studied The suitability distribution of the indicators, using stepwise regression and path analysis methods, analyzes the direct relationship between soil pH and soil nutrients, and provides a theoretical basis for improving the newly added cultivated land. The results showed that the soil pH in Heyang County varied from 8.42 to 9.67, the soil organic matter content varied from 3.46 to 17.93 g/kg, the soil total nitrogen content varied from 0.13 to 5.61 g/kg, and the soil available phosphorus changed The range is 1.73 ~ 63.06 mg/kg, and the soil available potassium range is 46.50 ~ 523.74. The newly added soil has a certain nutrient basis, but it should be further adjusted and improved during the cultivation process. The direct positive effect on soil pH value is mainly soil organic matter, and the direct negative effect is mainly soil available phosphorus. By adjusting the organic matter, total nitrogen, available phosphorus and available potassium in the soil, the pH value of the soil can be effectively improved, so that the newly cultivated soil is suitable for the growth of local crops.

scholarly journals Effect of Clay, Soil Organic Matter, and Soil pH on Initial and Residual Weed Control with Flumioxazin

Agronomy ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1326
Author(s):  
Calvin F. Glaspie ◽  
Eric A. L. Jones ◽  
Donald Penner ◽  
John A. Pawlak ◽  
Wesley J. Everman
Keyword(s):  
Organic Matter ◽  
Soil Organic Matter ◽  
Weed Control ◽  
Soil Ph ◽  
Organic Matter Content ◽  
Amaranthus Retroflexus ◽  
Matter Content ◽  
Weed Species ◽  
Soil Organic Matter Content ◽  
Field Soils

Greenhouse studies were conducted to evaluate the effects of soil organic matter content and soil pH on initial and residual weed control with flumioxazin by planting selected weed species in various lab-made and field soils. Initial control was determined by planting weed seeds into various lab-made and field soils treated with flumioxazin (71 g ha−1). Seeds of Echinochloa crus-galli (barnyard grass), Setaria faberi (giant foxtail), Amaranthus retroflexus (redroot pigweed), and Abutilon theophrasti (velvetleaf) were incorporated into the top 1.3 cm of each soil at a density of 100 seeds per pot, respectively. Emerged plants were counted and removed in both treated and non-treated pots two weeks after planting and each following week for six weeks. Flumioxazin control was evaluated by calculating percent emergence of weeds in treated soils compared to the emergence of weeds in non-treated soils. Clay content was not found to affect initial flumioxazin control of any tested weed species. Control of A. theophrasti, E. crus-galli, and S. faberi was reduced as soil organic matter content increased. The control of A. retroflexus was not affected by organic matter. Soil pH below 6 reduced flumioxazin control of A. theophrasti, and S. faberi but did not affect the control of A. retroflexus and E. crus-galli. Flumioxazin residual control was determined by planting selected weed species in various lab-made and field soils 0, 2, 4, 6, and 8 weeks after treatment. Eight weeks after treatment, flumioxazin gave 0% control of A. theophrasti and S. faberi in all soils tested. Control of A. retroflexus and Chenopodium album (common lambsquarters) was 100% for the duration of the experiment, except when soil organic matter content was greater than 3% or the soil pH 7. Eight weeks after treatment, 0% control was only observed for common A. retroflexus and C. album in organic soil (soil organic matter > 80%) or when soil pH was above 7. Control of A. theophrasti and S. faberi decreased as soil organic matter content and soil pH increased. Similar results were observed when comparing lab-made soils to field soils; however, differences in control were observed between lab-made organic matter soils and field organic matter soils. Results indicate that flumioxazin can provide control ranging from 75–100% for two to six weeks on common weed species.

Distribution of Organic Matter in Sediment of Lakeside Belt in East Dongting Lake

2012 ◽  
Vol 518-523 ◽  
pp. 319-325
Author(s):  
Dian Qing Lu ◽  
Hong Wang ◽  
Xu Lei Hou ◽  
Xiao Mei Liu
Keyword(s):  
Organic Matter ◽  
Ph Value ◽  
Organic Matter Content ◽  
Dongting Lake ◽  
Matter Content ◽  
Water Flow Velocity ◽  
Retarding Effect ◽  
Lake Region ◽  
Base Data ◽  
Wetland Types

Distribution of organic matter and effect of wetland types and pH on organic matter were studied in sediment of lakeside belt in east Dongting Lake according to taking 56 samples from surface to 20cm and 52 samples from 20cm to 40cm. The results showed that the average content of organic matter was 15.40g/kg from surface to 20cm and 12.02g/kg from 20cm to 40cm in sediment of lakeside belt in east Dongting Lake. Spatial distribution of organic matter could be expressed as middle variation. Wetland types were classed into silt beach, lake marsh beach and reed beach in Dongting Lake region and influenced distribution of organic matter because of difference variance on hydraulic dynamics condition and retarding effect of vegetation on water flow velocity. Order of organic matter content in sediment was the lake marsh beach > reed beach > silt beach in 0-20cm and 20-40cm layers in lakeside belt in east Dongting Lake. Organic matter contents decreased in turn from 0-20cm to 20-40cm in lake marsh and reed beaches and increased in silt beaches. Values of pH in sediment were slightly alkaline in whole studied region. Negative correlation was established between organic matter content and pH value. The results will provide base data and science reference for controlling and recovery of sediment pollution in east Dongting Lake.

Competitive adsorption of tetracycline, oxytetracycline and chlortetracycline on soils with different pH value and organic matter content

2019 ◽  
Vol 178 ◽  
pp. 108669 ◽  
Author(s):  
Manuel Conde-Cid ◽  
Gustavo Ferreira-Coelho ◽  
Avelino Núñez-Delgado ◽  
David Fernández-Calviño ◽  
Manuel Arias-Estévez ◽  
...  
Keyword(s):  
Organic Matter ◽  
Competitive Adsorption ◽  
Ph Value ◽  
Organic Matter Content ◽  
Matter Content

Growth of Eucalyptus species in a Brown Kandosol, and changes in soil phosphorus fractionation following fertilisation

Soil Research ◽  
2007 ◽  
Vol 45 (3) ◽  
pp. 190 ◽  
Author(s):  
Terrence A. Short ◽  
Peter M. Kopittke ◽  
David R. Mulligan ◽  
Neal W. Menzies
Keyword(s):  
Organic Matter ◽  
Surface Soil ◽  
Soil Phosphorus ◽  
Organic Matter Content ◽  
Maximum Growth ◽  
Phosphorus Fractionation ◽  
Matter Content ◽  
Eucalyptus Species ◽  
P Application ◽  
Fertiliser Application

As observed with many soils, much of the P in the Brown Kandosol soils of Weipa (Australia) is associated with organic matter. However, following bauxite mining, much of this organic matter is either lost due to mineralisation, or is ‘diluted’ by the mixing of the soil profile. Using a sequential P extraction, the partitioning of P following fertiliser application was examined in an ‘undisturbed’ (Surface) soil and a Mixed soil. In addition, the effect of split-P applications on the growth of 2 native Eucalyptus species was examined. Following its addition to the soil, much of the P was converted comparatively rapidly to forms with reduced availability; by the time of the first measurement (4 weeks) only approximately 10% of the added P remained as the readily available AER-P. For the Surface soil, much of this added P was initially converted to organic P (Po) (measured as hydroxide-Po), before progressively moving into the hydroxide-Pi fraction. In comparison, in the mixed soil, competition for P from microbial biomass was lower (due to a lower organic matter content) and the P was rapidly converted to the hydroxide-Pi fraction before moving to unavailable forms (residual P). Although the use of split-P applications was expected to increase plant growth, maximum growth of Eucalyptus tetrodonta and Eucalyptus leptophleba was generally achieved when all P fertiliser was applied in the first few weeks of growth. Indeed, splitting the P application beyond 16 weeks caused a significant reduction in growth.

Lime loss rates from arable and grassland soils

1998 ◽  
Vol 131 (4) ◽  
pp. 455-464 ◽  
Author(s):  
B. J. CHAMBERS ◽  
T. W. D. GARWOOD
Keyword(s):  
Organic Matter ◽  
Soil Ph ◽  
Agricultural Land ◽  
Negative Relationship ◽  
Organic Matter Content ◽  
Matter Content ◽  
N Fertilizer ◽  
Exchangeable Ca ◽  
Water Ph ◽  
Loss Rates

Lime loss rates were determined for 11 agricultural soils across England (1987–92) under arable cropping (six sites) and grassland management (five sites), receiving commercial rates of fertilizer inputs. Lime additions in the range 0–1500 kg ha−1 CaCO3 (250 kg ha−1 CaCO3 increments) were made annually to the sites. Soil pH (water and 0·01 m CaCl2) and exchangeable calcium concentrations were measured annually. The annual lime loss rates were calculated as the amount of lime needed to maintain the initial site pH or exchangeable Ca concentrations.Lime loss rates based on soil water pH varied between 40 and 1270 kg ha−1 CaCO3, on the basis of CaCl2 pH between 0 and 1370 kg ha−1 CaCO3, and exchangeable Ca between 0 and 1540 kg ha−1 CaCO3. There was a positive relationship between the lime loss rate (based on water pH) and initial soil pH value (r=0·75; P<0·01), and a negative relationship with soil organic matter content (r=0·63; P<0·05) was based on soil pH, organic matter content and nitrogen (N) fertilizer input. Lime loss rates were approximately double those predicted by previous models developed in the 1970s, reflecting the greater quantities of inorganic N fertilizer now being applied to agricultural land.

scholarly journals Utilização de água residuária tratada na recuperação da fertilidade de solo degradado no semiárido paraibano

2020 ◽  
Vol 1 (50) ◽  
pp. 90
Author(s):  
Emanoel Lima Martins ◽  
Vânia Da Silva Fraga ◽  
Salomão De Sousa Medeiros
Keyword(s):  
Organic Matter ◽  
Soil Organic Matter ◽  
Soil Phosphorus ◽  
Organic Matter Content ◽  
Matter Content ◽  
Phosphorus Recovery ◽  
Treated Wastewater ◽  
Semiarid Region ◽  
Productive Capacity ◽  
Water Type

<p class="Normal1">This study aimed to evaluate the effect of treated wastewater application on soil organic matter and phosphorus recovery in an Anthroposol in the semiarid region. An experiment was carried out with irrigation of five caatinga forest species, in which three treatments were applied that consisted of the variation of water type and volume applied to the soil, 7 L per week of water supply, 7 L and 14 L per week of wastewater. After two years of irrigation, soil samples were taken and analyzed for soil organic matter and phosphorus. The organic matter content in the treatment with 14 L application of wastewater was five times higher in relation to the application of supply water in the superficial layer and eight times in the sub-surface, respectively. Based on the results found, we can say that the use of wastewater from treated domestic sewage can be considered an alternative for the recovery of the productive capacity of the soil by the increase in the organic matter and soil phosphorus contents. Irrigation with treated wastewater can provide a considerable increase in soil organic matter and phosphorus content up to 30 cm deep.</p>

Effect of Tillage and Cover Crop on Fluometuron Adsorption and Degradation under Controlled Conditions

Weed Science ◽  
1994 ◽  
Vol 42 (4) ◽  
pp. 629-634 ◽  
Author(s):  
Blake A. Brown ◽  
Robert M. Hayes ◽  
Donald D. Tyler ◽  
Thomas C. Mueller
Keyword(s):  
Organic Matter ◽  
Soil Organic Matter ◽  
Soil Ph ◽  
Cover Crop ◽  
Soil Depth ◽  
Organic Matter Content ◽  
Chemical Properties ◽  
Exchange Capacity ◽  
Matter Content ◽  
No Till

Fluometuron adsorption and degradation were determined in soil collected at three depths from no-till + no cover, conventional-till + no cover, no-till + vetch cover, and conventional-till + vetch cover in continuous cotton. These combinations of tillage + cover crop + soil depth imparted a range of organic matter and pH to the soil. Soil organic matter and pH ranged from 0.9 to 2.5% and from 4.7 to 6.5, respectively. Fluometuron adsorption was affected by soil depth, tillage, and cover crop. In surface soils (0 to 4 cm), fluometuron adsorption was greater in no-till + vetch plots than in conventional-tilled + no cover plots. Soil adsorption of fluometuron was positively correlated with organic matter content and cation exchange capacity. Fluometuron degradation was not affected by adsorption, and degradation empirically fit a first-order model. Soil organic matter content had no apparent effect on fluometuron degradation rate. Fluometuron degradation was more rapid at soil pH > 6 than at pH ≤ 5, indicating a potential shift in microbial activity or population due to lower soil pH. Fluometuron half-life ranged from 49 to 90 d. These data indicate that tillage and cover crop may affect soil dissipation of fluometuron by altering soil physical and chemical properties that affect fluometuron degrading microorganisms or bioavailability.

scholarly journals Comparative Chemical Characterisation of Soils at Cypripedium Calceolus Sites in Latvia

2017 ◽  
Vol 71 (1-2) ◽  
pp. 43-51
Author(s):  
Dace Kļaviņa ◽  
Anita Osvalde
Keyword(s):  
Organic Matter ◽  
Soil Ph ◽  
Nutrient Concentration ◽  
Species Abundance ◽  
Organic Matter Content ◽  
Matter Content ◽  
Organic Soils ◽  
Strong Impact ◽  
Related Factors ◽  
Cypripedium Calceolus

Abstract The main aim of the study was to evaluate the soil chemical characteristics of Cypripedium calceolus sites in Latvia for understanding of the species ecology, and its conservation problems and possibilities. Soil for 27 C. calceolus sites in Latvia was analysed during 2007-2015. The concentration of plant available essential nutrients (N, P, K, Ca, Mg, S, Fe, Mn, Zn, Cu, Mo, B), soil pH, electrical conductivity and concentration of organic matter were determined. Nutrient concentration of C. calceolus leaf samples from six sites were determined. The results demonstrated high heterogeneity in soil chemical composition with high variation for Ca, Mg, and Mn. The results suggest some relationship between soil organic matter content and size of the orchid population. Soil pH and Ca concentration did not affect the size and vitality of C. calceolus populations in Latvia. There was no significant correlation between nutrient concentration in soil and C. calceolus leaves suggesting strong impact of other soil-related factors in determining the availability of nutrients. In general, the levels of N, P, K, Ca, Mg, Fe, Mn, and Zn concentrations in C. calceolus leaves were adequate or slightly decreased for successful orchid growth. The study showed deficiency of S, Cu, and B in the vast majority of leaf samples. C. calceolus sites in Latvia occur mainly on organic soils or mineral soils with high content of organic matter. There was a weak positive correlation (r = 0.21) observed only between total number of ramets of C. calceolus in site and Ca concentration in the soil, suggesting that soil properties are not a main factor affecting species abundance in the site.

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