Long-term effects of controlled release urea application on crop yields and soil fertility under rice-oilseed rape rotation system

Geng, Jibiao; Sun, Yunbao; Zhang, Min; Li, Chengliang; Yang, Yuechao; Li, Shuanglai

doi:10.1016/j.fcr.2015.09.003

Cited by 176 publications

(101 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…A cost‐benefit analysis is the most important index to evaluate the quality of fertilization method, and it was performed according to Geng et al (2015).

Gross return = GY \times grain price

Net return = GY \times grain price - total normalcosts

\begin{matrix} left \\ left Total normalcosts = normalN fertilizer normalcosts + topdressing normalcosts \\ left + plastic film mulching normalcosts + other normalcosts \end{matrix}

\begin{matrix} left \\ left Other normalcosts = normalcosts of false[ploughing + seed + seed ‐ \\ left ing + fertilizer (normalP and normalK fertilizer) + insecticide) \end{matrix}

…”

Section: Methodsmentioning

confidence: 99%

Response of Maize Productivity and Resource Use Efficiency to Combined Application of Controlled‐Release Urea and Normal Urea under Plastic Film Mulching in Semiarid Farmland

et al. 2019

View full text Add to dashboard Cite

Controlled‐release urea is considered to enhance crop yields while reducing labor costs from fertilizer dressing, but the impacts can range widely depending on water availability in soil. Therefore, we conducted a 3‐yr field study to evaluate the potential role of controlled‐release urea in improving productivity and resource use efficiency of maize in semiarid areas in China. Treatments were established as two mulching modes (plastic film mulching [FM] and no mulching [NM]) and three nitrogen application modes (no nitrogen fertilizer [CK], a 1:2 ratio of controlled‐release urea to common urea [CRU], and common urea only [U]). Higher temperature and soil water content under FM treatments significantly accelerated maize growth and development, as indicated in terms of a larger leaf area index before silking, greater biomass accumulation, and greater grain yield. More robust plants with controlled‐release urea under mulching can better absorb and utilize deep soil water to increase water use efficiency (WUE). Mean shoot biomass, grain yield, and WUE during the three experimental years were 35.3, 19.0, and 12.4% higher in mulching with CRU treatments than in NM with controlled‐release urea treatments, respectively. Significant interactions existed for yield and WUE among surface mulching (SM), nitrogen fertilizer (NF), and sampling year (Y) in the three experimental years, except for SM × NF for WUE. These results demonstrate that a mixture of controlled‐release urea and U at an appropriate ratio under SM can provide a better water/temperature/nitrogen conditions for maize growth to realize relatively high yield with labor and time savings in semiarid farmland. Core Ideas Film mulching benefits topsoil temperature, soil moisture, and utilization of deeper soil water. Combining controlled‐release urea (CRU) and urea increased yield and resource use. Combing CRU and urea under plastic film increased yield and WUE. One‐time application of CRU + urea at an appropriate ratio will satisfy spring maize in dryland farming systems.

show abstract

“…A cost‐benefit analysis is the most important index to evaluate the quality of fertilization method, and it was performed according to Geng et al (2015).

Gross return = GY \times grain price

Net return = GY \times grain price - total normalcosts

\begin{matrix} left \\ left Total normalcosts = normalN fertilizer normalcosts + topdressing normalcosts \\ left + plastic film mulching normalcosts + other normalcosts \end{matrix}

\begin{matrix} left \\ left Other normalcosts = normalcosts of false[ploughing + seed + seed ‐ \\ left ing + fertilizer (normalP and normalK fertilizer) + insecticide) \end{matrix}

…”

Section: Methodsmentioning

confidence: 99%

Response of Maize Productivity and Resource Use Efficiency to Combined Application of Controlled‐Release Urea and Normal Urea under Plastic Film Mulching in Semiarid Farmland

et al. 2019

View full text Add to dashboard Cite

show abstract

“…Cotton ( Gossypium hirsutum L.) is a major cash crop grown primarily for fiber ( Hu et al, ). Yield of cotton strongly depends on the supply of mineral nutrients, especially nitrogen (N), which has been widely used in cotton cultivation ( Geng et al, ). In China, urea is widely used as the primary solid N fertilizer in cotton production due to its high N content ( Dong et al, ; Drewer et al, ).…”

Section: Introductionmentioning

confidence: 99%

Controlled‐release urea decreased ammonia volatilization and increased nitrogen use efficiency of cotton

Tian

Geng

Guo

et al. 2017

J. Plant Nutr. Soil Sci.

Self Cite

View full text Add to dashboard Cite

Excessive nitrogen (N) fertilizer input leads to higher N loss via ammonia (NH3) volatilization. Controlled‐release urea (CRU) was expected to reduce emission losses of N. An incubation and a plant growth experiment with Gossypium hirsutum L. were conducted with urea and CRU (a fertilizer mixture of polymer‐coating sulfur‐coated urea and polymer‐coated urea with N ratios of 5 : 5) under six levels of N fertilization rates, which were 0% (0 mg N kg−1 soil), 50% (110 mg N kg−1 soil), 75% (165 mg N kg−1 soil), 100% (220 mg N kg−1 soil), 125% (275 mg N kg−1 soil), and 150% (330 mg N kg−1 soil) of the recommended N fertilizer rate. For each type of N fertilizer, the NH3 volatilization, cotton yield, and N uptake increased with the rate of N application, while N use efficiency reached a threshold and decreased when N application rates of urea and CRU exceeded 238.7 and 209.3 mg N kg−1 soil, respectively. Ammonia volatilization was reduced by 65–105% with CRU in comparison to urea treatments. The N release characteristic of CRU corresponded well to the N requirements of cotton growth. Soil inorganic N contents, leaf SPAD values, and net photosynthetic rates were increased by CRU application, particularly from the full bloom stage to the initial boll‐opening stage. As a result, CRU treatments achieved significantly higher lint yield by 7–30%, and the N use efficiency of CRU treatments was increased by 25–124% relative to that of urea treatments. These results suggest that the application of CRU could be widely used for cotton production with higher N use efficiency and lower NH3 volatilization.

show abstract

“…The contents of

{NH}_{4}^{+}

‐N and organic matter in PU‐CRF treatments were higher than urea treatment. The reason was that PU‐CRF achieved more yield and biomass, and also increased residues, including roots, returned to the soil, and as a result, increased

{NH}_{4}^{+}

‐N and organic matter . Moreover, it was observed that the addition of resin residual coatings increase these two values.…”

Section: Resultsmentioning

confidence: 99%

“…One part was stored fresh in a 4 °C refrigerator, and another part was air‐dried, and ground pass through 1 mm sieve and 0.25 mm sieve. The concentrations of

{NH}_{4}^{+}

‐N (extraction with 0.01 M CaCl 2 ) in fresh soil samples were measured in extract solution by using the AA3‐A001‐02E Auto‐analyzer (Bran‐Luebbe, Germany) within 48 h after collection . Soil available P content was measured using the Olsen‐P method.…”

Section: Methodsmentioning

confidence: 99%

“…Soil pH value was measured at the ratio of soil to distilled water (1:5, w:v) using a pH meter (PB‐10, Sartorius AG, Germany). Data were compared statistically by one‐way ANOVA with least significant difference test (Duncan's multiple range test) at the 0.05 probability level in Statistical Analysis System (SAS) package version 9.2 (2010, SAS Institute, Cary, NC) …”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Degradation of polyurethane coating materials from liquefied wheat straw for controlled release fertilizers

Zhang

Jia

et al. 2016

J of Applied Polymer Sci

Self Cite

View full text Add to dashboard Cite

Polyurethane (PU) was synthesized by liquefied wheat straw and isocyanates for controlled release fertilizers (CRFs). CRFs coated by PU were buried in soil for 12 months. The degradation degree and mechanism of PU coating materials were observed by thermogravimetric analysis (TGA), Atomic Force Microscope (AFM), differential scanning calorimetry (DSC), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and Fourier transform infra-red spectroscopy (FTIR). Significant microscopic morphology of PU exhibited many small chips or stereovision holes caused by biodegradation or hydrolytic degradation due to the presence of natural polymer wheat straw. AFM results depicted the plane and height topography changes of PU before and after 12 months burial time, showing the swelling morphology of buried PU. TGA and FTIR results confirmed the disintegration of PU polymer due to the presence of isocyanates monomers in the PU12. XPS revealed an accumulation of biofilm on the surface of buried PU, providing the evidence of biodegradation mechanism. Pot experiment indicated the resin residual coating has a positive effect on soil quality.

show abstract

Long-term effects of controlled release urea application on crop yields and soil fertility under rice-oilseed rape rotation system

Cited by 176 publications

References 36 publications

Response of Maize Productivity and Resource Use Efficiency to Combined Application of Controlled‐Release Urea and Normal Urea under Plastic Film Mulching in Semiarid Farmland

Response of Maize Productivity and Resource Use Efficiency to Combined Application of Controlled‐Release Urea and Normal Urea under Plastic Film Mulching in Semiarid Farmland

Controlled‐release urea decreased ammonia volatilization and increased nitrogen use efficiency of cotton

Degradation of polyurethane coating materials from liquefied wheat straw for controlled release fertilizers

Contact Info

Product

Resources

About