Effect of long-term combined nitrogen and phosphorus fertilizer application on 13 C CPMAS NMR spectra of humin in a Typic Hapludoll of northeast China

2009 ◽  
Vol 60 (6) ◽  
pp. 966-973 ◽  
Author(s):  
J. J. Zhang ◽  
S. Dou ◽  
X. Y. Song
Keyword(s):  
Northeast China ◽  
Nmr Spectra ◽  
Fertilizer Application ◽  
Phosphorus Fertilizer ◽  
Nitrogen And Phosphorus ◽  
Combined Nitrogen

Effect of combined nitrogen and phosphorus fertilizer application of wheat-maize intercropping system

2014 ◽  
Vol 22 (3) ◽  
pp. 262-269 ◽  
Author(s):  
Deping LIU ◽  
Shuqing YANG ◽  
Haibin SHI ◽  
Xiaobo ZHENG ◽  
Lingyu SUN ◽  
...  
Keyword(s):  
Fertilizer Application ◽  
Phosphorus Fertilizer ◽  
Nitrogen And Phosphorus ◽  
Combined Nitrogen

Changes in uranium and thorium contents in topsoil after long-term phosphorus fertilizer application

2011 ◽  
Vol 28 (1) ◽  
pp. 101-107 ◽  
Author(s):  
J. Wetterlind ◽  
A. C. Richer De Forges ◽  
B. Nicoullaud ◽  
D. Arrouays
Keyword(s):  
Fertilizer Application ◽  
Phosphorus Fertilizer

Assessing long-term water quality impacts of reducing phosphorus fertilizer in a US suburban watershed

Water Policy ◽  
2014 ◽  
Vol 16 (5) ◽  
pp. 917-929 ◽  
Author(s):  
Zeyuan Qiu ◽  
Tony Prato ◽  
Hongmei Wang
Keyword(s):  
Water Quality ◽  
Assessment Tool ◽  
Fertilizer Application ◽  
Unintended Consequences ◽  
Phosphorus Fertilizer ◽  
Municipal Governments ◽  
Load Duration ◽  
Run Off ◽  
The Usa

Phosphorus run-off from urban lawn care is a significant water quality concern in many US suburban communities. Many state and municipal governments in the USA adopt urban fertilizer laws or ordinances that prohibit the use of phosphorus-containing lawn fertilizers. This study assesses the long-term water-quality impacts of two phosphorus-reduction scenarios in a suburban watershed in Central New Jersey. While Scenario I reduces the phosphorus fertilizer application rates by 25%, Scenario II completely eliminates phosphorus fertilizer for urban lawns as required by such laws, rules or ordinances. The long-term water-quality impacts were estimated using the Soil and Water Assessment Tool and then compared to the total maximum daily load (TMDL) water-quality standards using the load duration curve approach. Scenario I will decrease total phosphorus (TP) load to streams by 15.34%. Scenario II achieves greater reduction in TP load to streams than Scenario I, but results in excessive nitrogen run-off and violation of the TMDL standard for total nitrogen. While many regulatory measures focus on reducing phosphorus run-off by prohibiting the use of phosphorus in urban lawn fertilizer, they should be carefully implemented to balance the nutrient needs to maintain healthy lawns and avoid such unintended consequences.

scholarly journals Simulating the Impact of Long-Term Fertilization on Basic Soil Productivity in a Rainfed Winter Wheat System

Agronomy ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 1544
Author(s):  
Ting Wang ◽  
Ningping Ding ◽  
Lili Li ◽  
Xiaodong Lyu ◽  
Qiang Chai ◽  
...  
Keyword(s):  
Winter Wheat ◽  
Nitrogen Fertilizer ◽  
Organic Fertilizer ◽  
Soil Productivity ◽  
Phosphorus Fertilizer ◽  
Nitrogen And Phosphorus ◽  
Fertilization Experiment ◽  
Combined Application ◽  
The Impact

Basic soil productivity (BSP) is the ability of a soil, in its normal environment to support plant growth. However, the assessment of BSP remains controversial. The aim of this study is to quantify and analyze the trends of BSP in winter wheat seasons using the decision support system for agrotechnologie transfer (DSSAT) model under a long-term fertilization experiment in the dark loessal soil region of the Loess Plateau of China. In addition, we evaluated the contribution percentage of BSP to yield and its influencing factors. A long-term fertilization experiment with a winter wheat/spring maize rotation was established in 1979 in a field of the Gaoping Agronomy Farm, Pingliang, Gansu, China, including six treatments: (1) no fertilizer as a control (CK), (2) chemical nitrogen fertilizer input annually (N), (3) chemical nitrogen and phosphorus fertilizer input annually (NP), (4) straw return and chemical nitrogen fertilizer input annually plus phosphorus fertilizer added every second year (SNP), (5) manure input annually (M), and (6) M plus N and P fertilizers added annually (MNP). The application of the DSSAT-CERES-Wheat model showed a satisfactory performance with good Wilmott d-index (0.78~0.95) and normalized root mean square error (NRMSE) (7.03%~18.72%) values for the tested genetic parameters of winter wheat. After the 26-years experiment, the yield by BSP of winter wheat under the M and MNP treatment significantly increased, at the rate of 2.7% and 3.82% a year, respectively, whereas that of CK and N treatments significantly decreased, at the rate of 0.23% and 3.03%. Moreover, the average contribution percentage of BSP to yield was 47.0%, 39.4%, 56.3%, 50.0%, and 61.9% in N, NP, SNP, M, and MNP treatments, respectively. In addition, soil organic carbon contents were the main controls of BSP under the different fertilization conditions in the dark loessial soil area. As a result, the combined application of organic fertilizer or straw and chemical fertilizer can be an effective form of fertilization management to greatly enrich basic soil productivity, continually promote the contribution percentage of BSP, and ultimately increase crop yield.

Eleven-year growth response of young conifers to biosolids or nitrogen and phosphorus fertilizer on northern Vancouver Island

2005 ◽  
Vol 35 (1) ◽  
pp. 211-214 ◽  
Author(s):  
Cindy E Prescott ◽  
Leandra L Blevins
Keyword(s):  
Growth Response ◽  
Tsuga Heterophylla ◽  
Thuja Plicata ◽  
Phosphorus Fertilizer ◽  
Chemical Fertilizers ◽  
Nitrogen And Phosphorus ◽  
Stand Volume ◽  
Municipal Biosolids ◽  
Type 3

To test the hypothesis that fertilization with municipal biosolids causes a larger long-term tree growth response than fertilization with conventional chemical fertilizers, we measured the height and diameter of planted western redcedar (Thuja plicata Donn ex D. Don), western hemlock (Tsuga heterophylla (Raf.) Sarg.), and amabilis fir (Abies amabilis (Dougl.) Forbes) 11 years after fertilization with biosolids or nitrogen and phosphorus fertilizer. There were four replicate plots of each tree species and treatment combination. The stand volume in cedar plots doubled in response to both treatments; in treated hemlock and fir plots, the stand volume was about triple that in control plots. There was little difference in tree response between biosolids-amended and fertilized plots. A type 3 response (growth rates remain elevated relative to those in the control) was evident for hemlock and fir. Biosolids appear to be as effective as chemical fertilizers in promoting conifer growth on these nutrient-poor sites, but their effect is neither greater nor more prolonged.

scholarly journals Effects of Nitrogen and Phosphorus Fertilizer Rates on Maize (Zea mays L.) Growth and Yields in Terraced Lands of Medium and High Altitude Regions of Rwanda

2020 ◽  
Author(s):  
A. Fashaho ◽  
A. O. Musandu ◽  
J. J. Lelei ◽  
S. M. Mwonga ◽  
G. M. Ndegwa
Keyword(s):  
Zea Mays ◽  
High Altitude ◽  
Zea Mays L ◽  
Block Design ◽  
Fertilizer Application ◽  
Phosphorus Fertilizer ◽  
Nitrogen And Phosphorus ◽  
Maize Yields ◽  
Four Levels ◽  
Fertilizer Rates

Depletion of nitrogen and phosphorus in terraced hilly areas of Rwanda has lowered maize (Zea mays L.) production. Trials were carried out in 2017 and 2018 in four-year-old-terraced Lixisols and Acrisols of medium and high altitudes to determine effect of nitrogen and phosphorus fertilizer application rates on maize yields. A factorial arrangement of four levels of nitrogen (0, 60, 120 and 180 kg N ha-1) and phosphorus (0, 40, 80 and 120 kg P2O5 ha-1) in a randomized complete block design with 3 replications, was used. Results showed that combinations of 120 - 180 kg N ha-1 and 80 - 120 kg P2O5 ha-1 resulted in significantly (P less than 0.05) higher increases in plant height (45 – 60 % and 56 – 70 % over the control), stem collar diameter (63 – 74 % and 43 % over the control) and grain yields (3 times over the control; i.e. 6.40 – 6.46 t ha-1 and 6.02 - 6.12 t ha-1) in medium and high altitude sites. The optimum fertilizer rates are 176.6 kg N ha-1 and 96.2 kg P2O5 ha-1 in terraced Lixisols of medium altitude area. Land use needs to adjust fertilizer application to these optimum rates for enhanced maize yields in this area and other regions with similar agro-ecological characteristics. Further studies on integrated effects of N and P fertilizers are recommended.

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