Relay-intercropping soybean with maize maintains soil fertility and increases nitrogen recovery efficiency by reducing nitrogen input

Stock plants of Pelargonium zonale `Empress' were grown for 130 days on coarse tuff medium in a greenhouse. Four N concentrations (50, 100,200, and 400 mg N/liter) and three NO3-: NH4+: ratios (70:30, 60:40, and 40:60) were applied. The development of mother plants, production of cuttings, and the recovery of applied N were measured. Number of cuttings was not affected by any treatments except for the low N concentration. The proportion of absorbed N was higher than that of water in the plants treated with 50 or 100 mg N/liter, while those fertilized with 200 or 400 mg N/liter absorbed more water relative to N uptake. Nitrogen recovery efficiency decreased from 70% to 10% for the 50- to 400-mg N/liter treatments, respectively. Percentage of applied N lost by leaching (30% to 70%), and N that could not be accounted for (0.5% to 20%), increased with increasing N concentration and NH4+ percentage in the solution. The minimum concentration to be used in fertilization of Pelargonium mother plants is 100 mg N/liter. Optimal N supplied ranged between 100 and 200 mg N/liter.

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Early nitrogen deficiency favors high nitrogen recovery efficiency by improving deeper soil root growth and reducing nitrogen loss in wheat

Archives of Agronomy and Soil Science ◽

10.1080/03650340.2019.1671972 ◽

2019 ◽

Vol 66 (10) ◽

pp. 1384-1398 ◽

Cited By ~ 1

Author(s):

Zhongwei Tian ◽

Xiaoxue Liu ◽

Jinhong Yu ◽

Shilu Gu ◽

Lei Zhang ◽

...

Keyword(s):

Root Growth ◽

Nitrogen Loss ◽

Nitrogen Deficiency ◽

Nitrogen Recovery ◽

Recovery Efficiency ◽

High Nitrogen ◽

Nitrogen Recovery Efficiency

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Optimal Nitrogen Practice in Winter Wheat-Summer Maize Rotation Affecting the Fates of 15N-Labeled Fertilizer

Agronomy ◽

10.3390/agronomy10040521 ◽

2020 ◽

Vol 10 (4) ◽

pp. 521

Author(s):

Haiyan Liang ◽

Pengfei Shen ◽

Xiangze Kong ◽

Yuncheng Liao ◽

Yang Liu ◽

...

Keyword(s):

Crop Yield ◽

N Uptake ◽

N Fertilization ◽

Nitrogen Recovery ◽

Shaanxi Province ◽

Recovery Efficiency ◽

N Losses ◽

Nitrogen Recovery Efficiency ◽

Potential Losses ◽

N Management

Lower nitrogen recovery efficiency (NRE) and negative environmental impacts caused by excessive nitrogen (N) fertilization threaten the sustainability of agriculture. Efficient and appropriate fertilization practices are extremely important to achieve higher crop yield with minimum N loss. A field microplot experiment was conducted in a wheat-maize rotation system in Shaanxi province, at North China Plain, using the 15N isotope tracer technique to qualify the different annual N managements in terms of crop yield, NRE, N distribution in plant-soil, and N losses to optimize the N management. The experiment included four N treatments: conventional practice with 510 kg ha−1 annually in four applications (N1), and three optimized N treatments, reducing N rate to 420 kg ha−1, adjusting topdressing fertilizer times and using slow-release fertilizer (SRF) (N2, N3, N4). The results showed that the grain yield and N uptake did not differ significantly among treatments. N from fertilizer taken up (Ndff) by wheat was not affected by N management; however, in maize, Ndff performed differently. Optimized treatments significantly decreased the Ndff as compared to N1 treatment. Furthermore, NRE of wheat and annual nitrogen recovery efficiency (annual NRE) did not differ among treatments in 2016 but significantly increased in 2017 compared to N1. Annual NRE in 2017 was similar to that obtained for wheat. For maize, optimized N managements decreased the NRE in N3 and N4 treatments of two years. Potential losses in wheat were also similar amongst treatments, but in maize, N3 and N4 had lower residual N in the soil’s top 60 cm but resulted in higher potential losses than N1 and N2. Overall, our results demonstrate that applying 420 kg N ha−1 annually in three applications and combining SRF and urea are effective to sustain crop yield, improve the efficiency of N usage by maize, and reduce N losses in this region.

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Ground Cover Rice Production System Increases Yield and Nitrogen Recovery Efficiency

Agronomy Journal ◽

10.2134/agronj2011.0419 ◽

2012 ◽

Vol 104 (5) ◽

pp. 1399-1407 ◽

Cited By ~ 34

Author(s):

Hang Qu ◽

Hongbin Tao ◽

Yueyue Tao ◽

Meiju Liu ◽

Kangrong Shen ◽

...

Keyword(s):

Production System ◽

Ground Cover ◽

Rice Production ◽

Nitrogen Recovery ◽

Recovery Efficiency ◽

Nitrogen Recovery Efficiency

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Nitrogen Recovery Efficiency from Urea Treated with NSN Co-Polymer Applied to No-Till Corn

Agronomy ◽

10.3390/agronomy8080154 ◽

2018 ◽

Vol 8 (8) ◽

pp. 154 ◽

Cited By ~ 1

Author(s):

Pablo Barbieri ◽

Hernán Sainz Rozas ◽

Hernán Echeverría

Keyword(s):

Grain Yield ◽

Management Practices ◽

Nitrogen Recovery ◽

N Recovery ◽

Recovery Efficiency ◽

N Losses ◽

Nitrogen Recovery Efficiency ◽

No Till ◽

Total Ammonia ◽

N Recovery Efficiency

Nitrogen (N) rate increases used by many farmers produce a reduced or null effect on N recovery efficiency (RE) by crops. Therefore, management practices to reduce N losses and increase RE are necessary. Co-polymer maleic itaconic acid (NSN) have become available for use with urea and has shown potential in reducing N losses. The objective of this study was to evaluate the effectiveness of urea treated with NSN on grain yield and RE in a no-till corn. A field experiment was carried out at Balcarce, Argentina over three years, evaluated treatments were urea and urea + NSN at 120 N kg ha−1, and additional 0 N treatment was included. Urea + NSN was effective to reduce total ammonia volatilization losses, and the average of two years were 1.4 (1.1% to N applied) and 8.7 kg ha−1 (7.2% to N applied) for urea + NSN and urea, respectively. However, while grain yield and N grain removal were not affected by urea + NSN, the N rate significantly increased grain yield and N grain removal. Nitrogen recovery efficiency was not affected by urea + NSN, RE (average of three years) was 29.0% and 27.8% for urea and urea + NSN, respectively. In conclusion, there was no advantage of using urea treated with NSN in no-till corn overgrain yield, N grain removal, or RE.

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