Co-application of controlled-release urea and a superabsorbent polymer to improve nitrogen and water use in maize

Fan, Zhen; Tian, Xiaofei; Zhai, Shumei; Liu, Zhongliang; Chu, Peng-Cheng; Li, Chengliang; Sun, Shuchen; Li, Tingting

doi:10.1080/03650340.2020.1862803

Cited by 13 publications

(7 citation statements)

References 28 publications

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“…Despite the noted explanations, one‐time fertilization with CRU mitigated root and branch damage during topdressing. Enhanced cotton productivity with CRU may also increase plant residues, including fallen leaves, branches, and roots, consequently increasing SOM (Zheng et al., 2020) and ultimately changing other soil properties, such as water‐holding and retention capacity (Fan et al., 2020), soil porosity (Shaviv, 2001), and microbial activity (Fernández‐Luqueño et al., 2009), as well as slowing soil acidification (Zheng et al., 2016). Additionally, the vestigial excess N from previous crops will also be released when needed (Tian et al., 2018).…”

Section: Discussionmentioning

confidence: 99%

“…For instance, sandy soils generally have high gas diffusivity and thus may decrease the reduction of N 2 O to N 2 via complete denitrification (Hu et al., 2015). In addition, since sandy soil is often characterized by low nutrient levels and water holding capacity, the N released from urea easily leaches into underground water though N mineralization and nitrification (Fan et al., 2020), especially with intensive rainfall or irrigation after fertilization. This result is consistent with that observed by Zhang et al.…”

Section: Discussionmentioning

confidence: 99%

“…Many types of new N fertilizers, such as urease and nitrification inhibitors and slow/controlled‐release fertilizers have been developed as alternative measures to improve NUE (Fan et al., 2020; Yang et al., 2013). Among these fertilizers, controlled‐release urea (CRU) shows great potential for enhancing NUE, reducing environmental pollution, and decreasing labor/time inputs in China (Tian, Geng, et al., 2017).…”

Section: Introductionmentioning

confidence: 99%

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Controlled‐release urea improved cotton productivity and nitrogen use efficiency in China: A meta‐analysis

et al. 2021

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The use of controlled-release urea (CRU) is recommended to improve crop productivity without compromising environmental quality, but the overall effects on cotton (Gossypium hirsutum L.) growth are not well studied. A meta-analysis was conducted to evaluate the effectiveness and potential role of CRU in improving cotton productivity in China. The results indicated that CRU increased cotton yield by 9.8% and nitrogen use efficiency (NUE) by 19.4% relative to urea at equal N rates, although the increase in yield was not statistically significant. Cotton yield increases were greater in sandy-textured soil than in loam or clay soil, and in experiments sustained for more than 2 yr than in experiments sustained for 1 yr. In addition, the increase in NUE with CRU was enhanced at medium (170 < N ≤ 220 kg N ha −1 ) and high N rates (>220 kg N ha −1 ), at high CRU blending ratios (≥70%) and in soils with pH >7.5. These results demonstrate that CRU should be more widely used for cotton production in China, especially in sandy-textured soil with increased N application.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Controlled‐release urea improved cotton productivity and nitrogen use efficiency in China: A meta‐analysis

et al. 2021

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“… 14 To this end, various types of SRWRNFs have been prepared by loading urea into the hydrogel networks or using liquid SAPs to coat urea particles. 15 However, the production and application of SRWRNFs still face many challenges: for example, urea is prone to decompose in acrylic acid, which is the most widely used monomer in SAPs. 16 Moreover, the higher ionic concentration resulting from the dissolution of fertilizers inhibits the polymerization of monomers and decreases water absorption by the SAP.…”

Section: Introductionmentioning

confidence: 99%

“… 9 Furthermore, our previous field experiments also found that the advantages of the SAPs to increase crop yield were greater when coapplied with slow-release urea than when coapplied with urea. 15 , 19 Thus, the preparation of SRWRNFs using a waste starch-based hydrogel as the loading material and UF incorporated as the slow-release N source by semi-interpenetrating methods should be quite innovative and interesting.…”

Section: Introductionmentioning

confidence: 99%

A Bio-Based Hydrogel Derived from Moldy Steamed Bread as Urea-Formaldehyde Loading for Slow-Release and Water-Retention Fertilizers

et al. 2021

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In this work, a novel slow-release and water-retention nitrogen (N) fertilizer (SRWRNF) was prepared using moldy steamed bread-based starch- g -poly(acrylic acid- co -acrylic amide) (SBS- g -P(AA/AM)) as the skeleton and urea-formaldehyde oligomers (UF) incorporated as the slow-release N source by semi-interpenetrating methods. Various analysis technologies including scanning electron microscopy, Fourier transform infrared spectroscopy, X-ray diffraction, thermogravimetric analysis, and differential scanning calorimetry were used to characterize the structure and properties of SRWRNFs. Swelling measurements indicated that the maximum water absorbency of SBS- g -P(AA/AM)-UF samples was 104.2 g/g in distilled water. The water-retention study showed that the SBS- g -P(AA/AM)-UF improved the maximum soil water content by 15.3–17.6% while improving soil water-retention capacity. N release experiments confirmed that SBS- g -P(AA/AM)-UF enabling offered a gradual N supply in soil. In comparison to conventional urea and UF fertilizers, the maize yield of SBS- g -P(AA/AM)-UF was increased by 20.3 and 9.7%, respectively. This study implies that the SRWRNFs provide a promising feasibility for large-scale applications in agriculture.

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Cereal‐Based Intercropping Systems Improve Yield Advantage and Crop Yield Under Superabsorbent Application in Semiarid Conditions

Narimani,

Taleshi,

Khorgami

et al. 2024

Legume Science

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Considering the yield advantage of cereal:legume intercropping in low nitrogen conditions, an experiment was laid out to examine the barley:chickpea intercropping treatments and their effects on biological yield and yield advantage of two plants under rain‐fed conditions as affected by a superabsorbent polymer (0, 50, 75, and 100 kg ha−1) in two cropping seasons. In both years, increasing the chickpea population increased the chickpea biological yield, total land equivalent ratio (TLER), competition index (CI), and barley and chickpea relative yields. Increasing the amount of the superabsorbent polymer to 100 kg ha−1 increased the chickpea competition ratio (0.86). The highest TLER (4.00) was related to 100:100 barley:chickpea intercropping without superabsorbent polymer application. In both years, the highest CI (0.21) was attained in the 100:100 barley:chickpea intercrop system in the first year. This was followed by the 100:100 barley:chickpea intercrop ratio (0.16) in the second year. The highest barley relative yields in the first year (3.91) and second year (3.57) were related to the 100:100 barley:chickpea plant ratio, which was higher than the yields for the 100:25 (38% and 35%), 100:50 (26% and 23%), and 100:75 (12% and 10%) ratios. Based on the results, the superiority of mixed cultivation, compared with pure cultivation, in the exploitation of production resources and integration of crop plants was observed.

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Co-application of controlled-release urea and a superabsorbent polymer to improve nitrogen and water use in maize

Cited by 13 publications

References 28 publications

Controlled‐release urea improved cotton productivity and nitrogen use efficiency in China: A meta‐analysis

Controlled‐release urea improved cotton productivity and nitrogen use efficiency in China: A meta‐analysis

A Bio-Based Hydrogel Derived from Moldy Steamed Bread as Urea-Formaldehyde Loading for Slow-Release and Water-Retention Fertilizers

Cereal‐Based Intercropping Systems Improve Yield Advantage and Crop Yield Under Superabsorbent Application in Semiarid Conditions

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