scholarly journals Crop yield, P uptake and soil organic phosphorus fractions in response to short-term tillage and fertilization under a rape-rice rotation in central China

2013 ◽  
pp. 0-0 ◽  
Author(s):  
Z.S Zhang ◽  
CG Cao ◽  
M.L Cai ◽  
C.F Li
Keyword(s):  
Crop Yield ◽  
Organic Phosphorus ◽  
P Uptake ◽  
Phosphorus Fractions ◽  
Central China ◽  
Short Term ◽  
Soil Organic Phosphorus

scholarly journals Effects of Short-term Tillage of a Long-term No-Till Land on Crop Yield and Nutrient Uptake in Two Contrasting Soil Types

2016 ◽  
Vol 5 (3) ◽  
pp. 32 ◽  
Author(s):  
Miles Dyck ◽  
Sukhdev S. Malhi ◽  
Marvin Nyborg ◽  
Dyck Puurveen
Keyword(s):  
Nutrient Uptake ◽  
Crop Yield ◽  
Crop Production ◽  
N Uptake ◽  
P Uptake ◽  
N Fertilization ◽  
Short Term ◽  
Plant Yield ◽  
No Till

<p>Pre-seeding tillage of long-term no-till (NT) land may alter crop production by changing the availability of some nutrients in soil. Effects of short-term (4 years) tillage (hereafter called reverse tillage [RT]) of land previously under long-term (29 or 30 years) NT, with straw management (straw removed [SRem] and straw retained [SRet]) and N fertilizer rate (0, 50 and 100 kg N ha<sup>-1</sup> in SRet, and 0 kg N ha<sup>-1</sup> in SRem plots), were determined on plant yield (seed + straw, or harvested as forage/silage at soft dough stage), and N and P uptake in growing seasons from 2010 to 2013 at Breton (Gray Luvisol [Typic Cryoboralf] loam) and from 2009 to 2012 at Ellerslie (Black Chernozem [Albic Argicryoll] loam), Alberta, Canada. Plant yield, N uptake and P uptake tended to be greater with RT compared to NT in most cases at both sites, although significant in a few cases only at Ellerslie. On average over both sites, RT produced greater plant yield by 560 kg ha<sup>-1</sup> yr<sup>-1</sup>, N uptake by 5.8 kg N ha<sup>-1</sup> yr<sup>-1</sup>, and P uptake by 1.8 kg P ha<sup>-1</sup> yr<sup>-1</sup> than NT. There was no consistent beneficial effect of straw retention on plant yield, N uptake and P uptake in different years. Plant yield, N uptake and P uptake increased with N fertilization at both sites, with up to the maximum rate of applied N at 100 kg N ha<sup>-1</sup> in 3 of 4 years at Breton and in 2 of 4 years at Ellerslie. In conclusion, our findings suggested some beneficial impact of occasional tillage of long-term NT soil on crop yield and nutrient uptake.</p>

Distribution Characteristics of Soil Organic Phosphorus Fractions in the Inner Mongolia Steppe

2020 ◽  
Vol 20 (4) ◽  
pp. 2394-2405
Author(s):  
Xiaoya Zhu ◽  
Xiaorong Zhao ◽  
Qimei Lin ◽  
Alamus ◽  
Hai Wang ◽  
...  
Keyword(s):  
Inner Mongolia ◽  
Organic Phosphorus ◽  
Phosphorus Fractions ◽  
Distribution Characteristics ◽  
Soil Organic Phosphorus

ANTHROPOGENIC EFFECT ON SOIL ORGANIC PHOSPHORUS FRACTIONS IN TROPICAL ECOSYSTEMS

2001 ◽  
Vol 32 (9-10) ◽  
pp. 1621-1628 ◽  
Author(s):  
Lidia Giuffré ◽  
Gabriel Piccolo ◽  
Ramón Rosell ◽  
Carla Pascale ◽  
Olga S. Heredia ◽  
...  
Keyword(s):  
Organic Phosphorus ◽  
Phosphorus Fractions ◽  
Anthropogenic Effect ◽  
Tropical Ecosystems ◽  
Soil Organic Phosphorus

scholarly journals Effect of ambient fine particulates (PM2.5) on hospital admissions for respiratory and cardiovascular diseases in Wuhan, China

2021 ◽  
Vol 22 (1) ◽  
Author(s):  
Zhan Ren ◽  
Xingyuan Liu ◽  
Tianyu Liu ◽  
Dieyi Chen ◽  
Kuizhuang Jiao ◽  
...  
Keyword(s):  
Air Pollution ◽  
Hospital Admission ◽  
Hospital Admissions ◽  
Conditional Logistic Regression ◽  
Warm Season ◽  
Central China ◽  
Air Pollution Control ◽  
Short Term ◽  
Short Term Exposure ◽  
Increased Risk

Abstract Background Positive associations between ambient PM2.5 and cardiorespiratory disease have been well demonstrated during the past decade. However, few studies have examined the adverse effects of PM2.5 based on an entire population of a megalopolis. In addition, most studies in China have used averaged data, which results in variations between monitoring and personal exposure values, creating an inherent and unavoidable type of measurement error. Methods This study was conducted in Wuhan, a megacity in central China with about 10.9 million people. Daily hospital admission records, from October 2016 to December 2018, were obtained from the Wuhan Information center of Health and Family Planning, which administrates all hospitals in Wuhan. Daily air pollution concentrations and weather variables in Wuhan during the study period were collected. We developed a land use regression model (LUR) to assess individual PM2.5 exposure. Time-stratified case-crossover design and conditional logistic regression models were adopted to estimate cardiorespiratory hospitalization risks associated with short-term exposure to PM2.5. We also conducted stratification analyses by age, sex, and season. Results A total of 2,806,115 hospital admissions records were collected during the study period, from which we identified 332,090 cardiovascular disease admissions and 159,365 respiratory disease admissions. Short-term exposure to PM2.5 was associated with an increased risk of a cardiorespiratory hospital admission. A 10 μg/m3 increase in PM2.5 (lag0–2 days) was associated with an increase in hospital admissions of 1.23% (95% CI 1.01–1.45%) and 1.95% (95% CI 1.63–2.27%) for cardiovascular and respiratory diseases, respectively. The elderly were at higher PM-induced risk. The associations appeared to be more evident in the cold season than in the warm season. Conclusions This study contributes evidence of short-term effects of PM2.5 on cardiorespiratory hospital admissions, which may be helpful for air pollution control and disease prevention in Wuhan.

MINERALIZATION OF SOIL ORGANIC PHOSPHORUS WITH PARTICULAR REFERENCE TO THE EFFECT OF LIME

1963 ◽  
Vol 43 (1) ◽  
pp. 97-106 ◽  
Author(s):  
R. L. Halstead ◽  
J. M. Lapensee ◽  
K. C. Ivarson
Keyword(s):  
Phosphorus Content ◽  
Organic Phosphorus ◽  
Acid Soils ◽  
Inorganic Phosphorus ◽  
Eastern Canada ◽  
Surface Samples ◽  
Soil Organic Phosphorus ◽  
Repressive Effect ◽  
Partial Sterilization ◽  
Positive Effect

In a laboratory experiment, liming resulted in an average decline of 3.6 per cent in the total organic phosphorus content of incubated surface samples of seven acid soils from eastern Canada. Increases of 2.6 and 5.1 per cent in 1N H2SO4- and 4N HCl-soluble inorganic phosphorus, respectively, and a decrease of 46.4 per cent in NaHCO3-soluble organic phosphorus (pH 8.5) provided further evidence of mineralization of organic phosphorus following liming. There was some evidence, however, that the differences in NaHCO3-soluble organic phosphorus following liming were due only in part to mineralization, since Ca(OH)2 added to a soil just prior to extraction with NaHCO3 had a repressive effect on the solubility of the organic phosphorus compounds.Some mineralization of organic phosphorus occurred when unlimed samples were incubated in the laboratory for 9 months.Marked increases in microbiological activity, as indicated by increased numbers of microorganisms, and increased CO2 and NO3-nitrogen production, were associated with lower values for extractable organic phosphorus following liming. Partial sterilization of samples with toluene lowered biological activity in the unlimed and limed samples. Toluene was found, however, to have a positive effect on release of phosphorus from organic form.

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