Influence of nitrogen fertilization on broccoli yield, nitrogen accumulation and apparent fertilizer-nitrogen recovery

1995 ◽  
Vol 75 (3) ◽  
pp. 717-725 ◽  
Author(s):  
B. J. Zebarth ◽  
P. A. Bowen ◽  
P. M. A. Toivonen
Keyword(s):  
Fertilization Rate ◽  
Application Rate ◽  
N Recovery ◽  
Nitrogen Accumulation ◽  
Fertilizer N ◽  
Inorganic N ◽  
Marketable Yield ◽  
N Accumulation ◽  
Available N ◽  
Fertilizer N Recovery

An understanding the relationships between N-fertilization rate, crop-N recovery, residual inorganic N in soil and crop yield can assist in making N fertilizer recommendations which balance crop value and environmental risk. Nitrogen was applied to three plantings of broccoli at 0, 125, 250, 375, 500 and 625 kg N ha−1 as a broadcast application of ammonium nitrate, 50% at transplanting and 50% 2 wk later. Crop-marketable yield, aboveground dry matter yield and N accumulation, and extractable-soil inorganic N to 75 cm depth were determined at harvest. Crop-marketable yield, measured as fresh weight of heads, increased with increasing N rate to a maximum between N rates of 435 and 560 kg N ha−1. Nitrogen accumulation in the aboveground portion of the plant increased with increasing N rate and reached a maximum of 345–465 kg N ha−1. Apparent fertilizer-N recovery in the aboveground portion of the plant decreased linearly from between 46 and 93% at a N rate of 125 kg N ha−1 to between 20 and 44% at a N rate of 625 kg N ha−1. Apparent fertilizer-N recovery in the harvested portion of the plant decreased linearly from between 14 and 25% at a N rate of 125 kg N ha−1 to between 8 and 14% at a N rate of 625 kg N ha−1. Soil profile nitrate-N to 75 cm depth at harvest increased with N application rate in a curvilinear fashion, and averaged 3 kg N ha−1 with no N applied to 420 kg N ha−1 at the maximum N rate. The potential to develop a soil nitrate test to predict the fertilizer-N requirement of broccoli is discussed. Key words: Plant-available N

Late-Fall, Winter, and Spring Broadcast Applications of Urea to No-Till Winter Wheat II. Fertilizer N recovery, Yield, and Protein as Affected by NBPT

2017 ◽  
Vol 81 (2) ◽  
pp. 331-340 ◽  
Author(s):  
Carlos M. Romero ◽  
Richard E. Engel ◽  
Chengci Chen ◽  
Roseann Wallander ◽  
Clain A. Jones
Keyword(s):  
Winter Wheat ◽  
N Recovery ◽  
Fertilizer N ◽  
Recovery Yield ◽  
No Till ◽  
Late Fall ◽  
Fertilizer N Recovery

scholarly journals Yield, Nitrogen Dynamics, and Fertilizer Use Efficiency in Machine-harvested Cucumber

HortScience ◽  
2009 ◽  
Vol 44 (6) ◽  
pp. 1712-1718 ◽  
Author(s):  
Laura L. Van Eerd ◽  
Kelsey A. O'Reilly
Keyword(s):  
N Uptake ◽  
Growing Season ◽  
Control Treatment ◽  
Yield Response ◽  
N Recovery ◽  
Fertilizer N ◽  
N Budget ◽  
Available N ◽  
N Removal ◽  
Use Efficiency

The increase in fertilizer costs as well as environmental concerns has stimulated growers to re-evaluate their fertilizer applications to optimize nitrogen use efficiency (NUE) while maintaining crop yields and minimizing N losses. With these objectives, field trials were conducted at seven sites with five N rates (0 to 220 kg N/ha) of ammonium-nitrate applied preplant broadcast and incorporated as well as a split application treatment of 65 + 45 kg N/ha. In three contrasting years (i.e., cool/wet versus warm/dry versus average), N treatment had no observable effect on grade size distribution or brine quality. Based on the zero N control treatment, the limited yield response to fertilizer N was the result of sufficient plant-available N over the growing season. In the N budget, there was no difference between N treatments in crop N removal, but there was a positive linear relationship between N applied and the quantity of N in crop residue as well as in the soil after harvest. As expected, apparent fertilizer N recovery and N uptake efficiency were lower at 220 versus 110 kg N/ha applied preplant or split. The preplant and split applications of 110 kg N/ha were not different in yield, overall N budget, or NUE. Considering the short growing season, planting into warm soils, and the generally productive, nonresponsive soils in the region, growers should consider reducing or eliminating fertilizer N applications in machine-harvested cucumber.

scholarly journals Improved Root Growth by Liming Aluminum-Sensitive Rice Cultivar or Cultivating an Aluminum-Tolerant One Does Not Enhance Fertilizer Nitrogen Recovery Efficiency in an Acid Paddy Soil

Plants ◽  
2020 ◽  
Vol 9 (6) ◽  
pp. 765
Author(s):  
Hao Qing Zhang ◽  
Xue Qiang Zhao ◽  
Yi Ling Chen ◽  
Jia Lin Wang ◽  
Ren Fang Shen
Keyword(s):  
Root Growth ◽  
Paddy Soil ◽  
N Uptake ◽  
Rice Cultivar ◽  
N Recovery ◽  
Recovery Efficiency ◽  
Fertilizer N ◽  
Fertilizer N Recovery ◽  
Exchangeable Al ◽  
N Recovery Efficiency

The root is the main site of nitrogen (N) acquisition and aluminum (Al) toxicity. The objective of this study is to investigate whether liming and cultivation of an Al-tolerant rice (Oryza sativa L.) cultivar can improve root growth, thereby increasing N acquisition by rice plants in acid paddy soil. Two rice cultivars (‘B690’, Al-sensitive, and ‘Yugeng5’, Al-tolerant) were cultivated with 15N-labeled urea, and with or without lime in an acid paddy soil (pH 4.9) in pots. We examined root and shoot growth, soil pH, soil exchangeable Al, N uptake, 15N distribution in plant-soil system, and fertilizer N recovery efficiency. Results showed that liming improved the root growth of ‘B690’ by decreasing soil exchangeable Al concentrations, in both N-limited and N-fertilized soils. Liming enhanced the N uptake of ‘B690’ only in the absence of N fertilizer. The root weight of ‘Yugeng5’ was greater than that of ‘B690’ without lime, but the two cultivars showed similar N uptake. The fertilizer N recovery efficiency and N loss did not differ significantly between limed and non-limed conditions, or between the two rice cultivars. Thus, liming an Al-sensitive rice cultivar and cultivating an Al-tolerant one improves root growth, but does not enhance fertilizer N recovery efficiency in the present acid paddy soil.

scholarly journals Low-N stress tolerant maize hybrids have higher fertilizer N recovery efficiency and reduced N-dilution in the grain compared to susceptible hybrids under low N conditions

2020 ◽  
Vol 23 (4) ◽  
pp. 417-426
Author(s):  
Chisaka Arisede ◽  
Zaman-Allah Mainassara ◽  
Cairns Jill ◽  
Tarekegne Amsal ◽  
Magorokosho Cosmos ◽  
...  
Keyword(s):  
N Recovery ◽  
Recovery Efficiency ◽  
Fertilizer N ◽  
Maize Hybrids ◽  
Fertilizer N Recovery ◽  
N Recovery Efficiency

The course of fertilizer nitrogen uptake by rainfed sugarcane in Mauritius

1994 ◽  
Vol 122 (3) ◽  
pp. 385-391 ◽  
Author(s):  
K. F. Ng Kee Kwong ◽  
J. Deville
Keyword(s):  
Dry Matter ◽  
N Uptake ◽  
N Recovery ◽  
Dry Matter Accumulation ◽  
Fertilizer N ◽  
N Losses ◽  
Total N ◽  
Fertilizer N Recovery ◽  
The Difference ◽  
Fertilizer N Uptake

SUMMARYThe patterns of N uptake and dry matter synthesis by sugarcane (Saccharum hybrid spp.) were studied at four locations in Mauritius with 15N–labelled ammonium sulphate (100 kg N/ha) applied either in a single dressing in September or in two split applications in September and the following February. More than 80% of the total N recovered at harvest (100–120 kgN/ha) was absorbed by the sugarcane during an active uptake period from October to January. Split application prolonged this active N uptake until April only and had no effect on dry matter accumulation. While total Nabsorbed by above-ground sugarcane showed no decline over time, 10–20 kg N/ha of the 15N–labelled N was lost from the green tops even when the N was applied on two occasions. The fertilizer N losses from above-ground sugarcane were, however, not evident when fertilizer N recovery with time was studied by the difference method. In view of the observed losses of fertilizer N from the aerial parts of sugarcane, measurement of fertilizer N recovery at harvest by the N isotope dilution technique underestimates fertilizer N uptake by sugarcane and attributes too large a fraction of N loss to denitrification/volatilization of NH3.

Rate and timing of nitrogen fertilization of Russet Burbank potato: Nitrogen use efficiency

2004 ◽  
Vol 84 (3) ◽  
pp. 845-854 ◽  
Author(s):  
B. J. Zebarth ◽  
Y. Leclerc ◽  
G. Moreau
Keyword(s):  
Dry Matter ◽  
N Fertilization ◽  
N Use Efficiency ◽  
Fertilizer N ◽  
Inorganic N ◽  
N Accumulation ◽  
N Supply ◽  
Soil Inorganic N ◽  
Use Efficiency ◽  
N Use

This study evaluated rate and timing of N fertilization effects on the N use efficiency characteristics of rain-fed Russet Burbank potato. Trials conducted in 1999–2001 included different rates of fertili zer N (0–160 kg N ha-1 in 1999 and 0–200 kg N ha-1 in 2000 and 2001) applied either at planting according to normal grower practice, or at hilling, the latest time that granular fertilizer can practically be applied. Whole-plant dry matter and N accumulation were determined at topkill. Soil inorganic N content was measured to 30-cm depth at planting and at tuber harvest. Soil N supply (plant N accumulation plus soil inorganic N content at harvest with no fertilizer N applied) varied from 77 to 146 kg N ha-1 depending on the year. Crop N supply (soil N supply plus fertilizer N applied) was a better predictor of plant N accumulation than fertilizer N rate, and was used to remove the confounding effect of variation in soil N supply when making among-year comparisons for N use efficiency characteristics. Nitrogen uptake efficiency (NUpE; plant N accumulation/crop N supply) decreased with increasing rates of N applied at hilling N rate in 1999, which was a dry year, but was not influenced by at-hilling N rate in 2000 and 2001, or by at-planting N rate in any year. Nitrogen use efficiency (NUE; dry matter accumulation/crop N supply) and N utilization efficiency (NUtE; dry matter accumulation/plant N accumulation) decreased curvilinearly with increasing crop N supply in each year. Similar relationships between NUE and crop N supply, and between NUtE and plant N accumulation, among the 3 yr of the study suggest that these relationships are largely independent of seasonal climatic variation, and are primarily genetically controlled. Timing of N fertilization had no effect on any N use efficiency parameter, with the exception of reduced NUpE associated with split N application in 1999. This suggests that under rain-fed potato production in Atlantic Canada, timing of N fertilization has no significant effect on N use efficiency of Russet Burbank potato in years of adequate soil moisture, but NUpE may be decreased by split application of N in dry years. Key words: Solanum tuberosum, soil inorganic N, apparent fertilizer N recovery

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