Effects of irrigation and nitrogen application rates on nitrate nitrogen distribution and fertilizer nitrogen loss, wheat yield and nitrogen uptake on a recently reclaimed sandy farmland

2010 ◽  
Vol 337 (1-2) ◽  
pp. 325-339 ◽  
Author(s):  
Qi Wang ◽  
Fengrui Li ◽  
Lin Zhao ◽  
Enhe Zhang ◽  
Shangli Shi ◽  
...  
Keyword(s):  
Nitrogen Uptake ◽  
Nitrate Nitrogen ◽  
Nitrogen Loss ◽  
Wheat Yield ◽  
Nitrogen Application ◽  
Nitrogen Distribution ◽  
Fertilizer Nitrogen ◽  
Application Rates

scholarly journals The response of potato tuber yield, nitrogen uptake, soil nitrate nitrogen to different nitrogen rates in red soil

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Kailou Liu ◽  
Jiangxue Du ◽  
Yijun Zhong ◽  
Zhe Shen ◽  
Xichu Yu
Keyword(s):  
Nitrogen Uptake ◽  
Nitrogen Fertilizer ◽  
Nitrogen Balance ◽  
Nitrogen Fertilization ◽  
Tuber Yield ◽  
Nitrate Nitrogen ◽  
Red Soil ◽  
Nitrogen Application ◽  
Nitrogen Surplus ◽  
Application Rates

AbstractNutrient-deficient red soil found in the southern region of China is increasingly being used for potato crops to meet the demand for this staple food. The application of nitrogen fertilizer is necessary to support the production of higher tuber yields; however, the links between nitrate nitrogen and the nitrogen balance in red soil are unknown. A field experiment was conducted in Jiangxi Province in 2017 and 2018 to determine the effects of different nitrogen application rates, 0 kg ha−1 (N0), 60 kg ha−1 (N60), 120 kg ha−1 (N120), 150 kg ha−1 (N150), 180 kg ha−1 (N180), 210 kg ha−1 (N210), and 240 kg ha−1 (N240, the highest rate used by local farmers), on potatoes growing in red soil. Data on tuber yield, crop nitrogen uptake, and the apparent nitrogen balance from the different treatments were collected when potatoes were harvested. Additionally, the content and stock of nitrate nitrogen at different soil depths were also measured. Nitrogen fertilization increased tuber yield but not significantly at application rates higher than 150 kg ha−1. We estimated that the threshold rates of nitrogen fertilizer application were 191 kg ha−1 in 2017 and 227 kg ha−1 in 2018, where the respective tuber yields were 19.7 and 20.4 t ha−1. Nitrogen uptake in potato in all nitrogen fertilization treatments was greater than that in N0 by 61.2–237% and 76.4–284% in 2017 and 2018, respectively. The apparent nitrogen surplus (the amount of nitrogen remaining from any nitrogen input minus nitrogen uptake) increased with increasing nitrogen application rates. The nitrate nitrogen stock at a soil depth of 0–60 cm was higher in the 210 and 240 kg ha−1 nitrogen rate treatments than in the other treatments. Moreover, double linear equations indicated that greater levels of nitrogen surplus increased the nitrate nitrogen content and stock in soils at 0–60 cm depths. Therefore, we estimate that the highest tuber yields of potato can be attained when 191–227 kg ha−1 nitrogen fertilizer is applied to red soil. Thus, the risk of nitrate nitrogen leaching from red soil increases exponentially when the apparent nitrogen balance rises above 94.3–100 kg ha−1.

Nitrogen Fertilization of Sugarcane in an Intercropping System with Maize and Potato in the Humid Tropical Climate of Mauritius

1996 ◽  
Vol 32 (2) ◽  
pp. 213-218 ◽  
Author(s):  
K. F. Ng Kee Kwong ◽  
G. Umrit ◽  
J. Deville
Keyword(s):  
Nitrogen Uptake ◽  
Nitrogen Fertilization ◽  
Field Experiments ◽  
Nitrogen Recovery ◽  
Food Crops ◽  
Pure Stand ◽  
Nitrogen Application ◽  
Fertilizer Nitrogen ◽  
Labelled Nitrogen ◽  
Companion Crop

SUMMARYThe competition for fertilizer nitrogen between sugarcane and a companion crop (maize or potato) grown between the sugarcane rows was studied using nitrogen-15 labelled nitrogen in three field experiments in Mauritius. The effect of the timing of nitrogen application on nitrogen recovery by sugarcane was also investigated. Not more than 15 kg ha−1 of the 120 kg ha−1 nitrogen applied to the sugarcane was taken up by the companion crop but this was compensated for by the uptake of 8 kg ha−1 nitrogen applied to maize or potato. The present recommendations for nitrogen fertilization of pure stand sugarcane were found to be applicable to sugarcane intercropped with non-leguminous food crops. Though fertilizer nitrogen uptake by sugarcane was increased by delaying nitrogen application until after the harvest of the maize and potato, this was not accompanied by an increase in sugarcane yields.

The effect of a wide range of fertilizer nitrogen application rates and defoliation intervals on the dry-matter production, seasonal response to nitrogen, persistence and aspects of chemical composition of perennial ryegrass (Lolium perennecv. S.24)

1977 ◽  
Vol 88 (3) ◽  
pp. 711-721 ◽  
Author(s):  
P. W. Bartholomew ◽  
D. M. B. Chestnutt
Keyword(s):  
Dry Matter ◽  
Maximum Yield ◽  
Ground Cover ◽  
Growing Season ◽  
Nitrate Content ◽  
Nitrogen Application ◽  
Fertilizer Nitrogen ◽  
Application Rates ◽  
Wide Range ◽  
Small Plot

SUMMARYA small-plot experiment was made to assess the influence on dry-matter output from grass of a wide range of fertilizer nitrogen and defoliation interval treatments. There were five defoliation treatments, 22, 28, 45, 75 and 112-day regrowth intervalsroughout the growing season each at six levels of nitrogen application, ranging by 300 kg increments from 0 to 1500 kg/ha/year.There was a marked interaction effect between treatments; a positive dry-matter response was maintained to a higher level of applied nitrogen with more frequent defoliation. In 2 years out of 3 maximum dry-matter yield was produced under a 75·day defoliation interval although the mean yield advantage over a 45-day defoliation system was only 11%. Mean yield of digestible dry matter appeared to reach a maximum under a 45·day defoliation interval at 600 kg N/ha but at the lower levels of N the maximum yield was reached at the longest growth interval.Seasonal response to nitrogen under the 22–day and 28–day defoliation systems measured as the increase in yield resulting from increased N at each cutting date reached its peak in July–August. Application for these short growth periods early and late in the growing season appeared to be a relatively inefficient use of nitrogen.The less frequently the sward was harvested and the higher the nitrogen application the greater was the reduction in ground cover as estimated by eye at the end of the growing season, this reached an estimated 25% reduction under 112·day defoliation at 300 kg N/ha/year.In relation to published figures nitrate content of herbage did not reach dangerous levels until nitrogen application reached levels beyond those at which maximum dry·matter yield was achieved.

Estimation of Canadian manure and fertilizer nitrogen application rates at the crop and soil-landscape polygon level

2008 ◽  
Vol 88 (5) ◽  
pp. 619-627 ◽  
Author(s):  
T. Huffman ◽  
J Y Yang ◽  
C F Drury ◽  
R. De Jong ◽  
X M Yang ◽  
...  
Keyword(s):  
Policy Formulation ◽  
Land Application ◽  
Economic Modeling ◽  
Environmental Indicators ◽  
Nitrogen Application ◽  
Fertilizer Nitrogen ◽  
Model Soil ◽  
Application Rates ◽  
Nitrogen Inputs ◽  
Excretion Rates

In support of national environmental and economic modeling of agri-environmental indicators, greenhouse gases, carbon sequestration and policy assessment, fertilizer and manure nitrogen application rates were estimated for individual crops at the scale of the 1:1 m Soil Landscapes of Canada polygons. This database provides an estimate of the amount of nitrogen applied to each crop and is based on provincial fertilization recommendations, the type and number of livestock and manure produced and reported amounts of fertilizer sold. The database is being incorporated into ongoing programs related to international reporting, environmental performance and policy formulation at Agriculture and Agri-Food Canada.This paper describes the procedures developed to estimate fertilizer and manure nitrogen inputs for each crop type within each polygon. These procedures include: (i) the compilation of soil-specific recommended nitrogen application rates from provincial extension guide lines and experts; (ii) the calculation of total manure nitrogen production from animal numbers and excretion rates; (iii) the calculation of manure nitrogen available after land application losses and (iv) the adjustment of total fertilizer nitrogen applied to match reported sales at the provincial level. The calculation procedures were incorporated into the Canadian Agricultural Nitrogen Budget model, with provisions for transferring the data to other models and for other applications. Key words: Fertilizer nitrogen, manure nitrogen, nitrogen application rates, nitrogen model, Soil Landscapes of Canada, Census of Agriculture

Nitrogen loss on tile-drained Mollisols as affected by nitrogen application rate under continuous corn and corn-soybean rotation systems

2012 ◽  
Vol 92 (3) ◽  
pp. 493-499 ◽  
Author(s):  
M.J. Helmers ◽  
X. Zhou ◽  
J.L. Baker ◽  
S.W. Melvin ◽  
D.W. Lemke
Keyword(s):  
Nitrogen Loss ◽  
Subsurface Drainage ◽  
Application Rate ◽  
Corn Yield ◽  
Nitrogen Application ◽  
N Application ◽  
Continuous Corn ◽  
Application Rates ◽  
N Application Rate ◽  
Nitrogen Application Rate

Helmers, M. J., Zhou, X., Baker, J. L., Melvin, S. W. and Lemke, D. W. 2012. Nitrogen loss on tile-drained Mollisols as affected by nitrogen application rate under continuous corn and corn-soybean rotation systems. Can. J. Soil Sci. 92: 493–499. Nitrate-nitrogen (NO3-N) loss from production agricultural systems through subsurface drainage networks is of local and regional concern throughout the Midwestern United States. The increased corn acreage and the practice of growing continuous corn instead of a corn-soybean rotation system due to the increasing demand for food and energy have raised questions about the environmental impacts of this shift in cropping systems. The objective of this 4-yr (1990–1993) study was to evaluate the effect of nitrogen (N) application rate (0–168 kg N ha−1 for corn following soybean and 0–224 kg N ha−1 for corn following corn) on NO3-N concentration, NO3-N losses, and crop yields in continuous corn and corn-soybean production systems on tile-drained Mollisols in north central Iowa. The results show that NO3-N concentrations from the continuous corn system were similar to NO3-N concentrations from the corn-soybean rotation at equivalent N application rates.When extra N fertilizer (approximately 56 kg N ha−1) was applied to continuous corn than the corn-soybean rotation, this resulted in 14–36% greater NO3-N concentrations in subsurface drainage from the continuous corn system. While corn yield increased as N application rate increased, corn yields at the recommended N application rates (112–168 kg N ha−1) in the corn-soybean rotation were up to 3145 kg ha−1 greater than corn yields at the recommended application rates (168–224 kg N ha−1) in the continuous corn system. The corn-soybean rotation with recommended N application rates (168–224 kg N ha−1) appeared to be beneficial environmentally and economically.

NITRATE NITROGEN DISTRIBUTION IN CORN LAND FOLLOWING APPLICATIONS OF DIGESTED SEWAGE SLUDGE

1975 ◽  
Vol 55 (3) ◽  
pp. 287-294 ◽  
Author(s):  
N. E. STEWART ◽  
E. G. BEAUCHAMP ◽  
L. R. WEBBER ◽  
C. T. CORKE
Keyword(s):  
Sewage Sludge ◽  
Soil Profile ◽  
Nitrate Nitrogen ◽  
Soil Surface ◽  
Nitrogen Distribution ◽  
Application Rates ◽  
Loam Soil ◽  
Crop Harvest ◽  
Digested Sewage Sludge ◽  
Sludge Application

Anaerobically digested sewage sludge was applied to a loam soil at rates of 1.25, 2.5 and 5.0 cm ha−1. Treatments were replicated four times, and all plots were cropped to corn. The soil in the 0- to 90-cm profile under each plot was sampled every month from May to October in 1972 and analyzed for NO3−-N and NH4+. The two highest sludge application rates resulted in significant increases in soil NO3−-N in the 0- to 90-cm soil profile, which persisted until October following crop harvest. Of the N supplied by the sludge, only about 3–12% was recovered by the corn crop. At the conclusion of the experiment, in October, 6–10% of the N supplied by the sludge remained in the soil and on the soil surface in the residual solids. Sludge applications in excess of 1.25 cm ha−1 did not produce significant increases in the yields of grain or stover.

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