Polyolefin Wax Modification Improved Characteristics of Nutrient Release from Biopolymer-Coated Phosphorus Fertilizers

Lu, Hao; Tian, Hongyu; Liu, Zhiguang; Zhao, Chenhao; Guo, Yanle; Guan, Rui; Chen, Qi; Yu, Xiang; Wang, Huaili; Zheng, Lei

doi:10.1021/acsomega.9b03348

Cited by 37 publications

(21 citation statements)

References 35 publications

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“…When particle surface became smoother with water polishing, the particles were in closer contact with the membrane material, and the unnecessary use of membrane material described above were reduced. Thus, water polishing allowed the coating material to be sprayed on the particle surface more evenly, thereby resulting in uniform film thickness 40 . Note that the asymmetrical membrane structure was formed at the uneven adhesion site of DAP particle (Fig.…”

Section: Resultsmentioning

confidence: 99%

Water Polishing improved controlled-release characteristics and fertilizer efficiency of castor oil-based polyurethane coated diammonium phosphate

Lu¹,

Tian²,

Zhang³

et al. 2020

Sci Rep

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The production cost of controlled-release fertilizers is an important factoring limiting their applications. To reduce the coating cost of diammonium phosphate (DAP) and improve its nutrition release characteristics, the fertilizer cores were modified by water polishing with three dosages at 1, 2, and 3%. The effects of modification were evaluated in terms of particle hardness, size distribution, angle of repose and specific surface area. Castor oil-based polyurethane was used as coating material for fertilizer performance evaluation. A pot experiment was conducted to verify the fertilizer efficiency of coated diammonium phosphate (CDAP) with maize. The results showed that polishing with 2% water reduced the angle of repose by 2.48-10.57% and specific surface area by 5.70-48.76%, making it more suitable for coating. The nutrient release period of CDAP was significantly prolonged by 5.36 times. Soil available phosphorous, enzyme activities, maize grain yield, and phosphorous use efficiency were all improved through the blending application of coated and normal phosphate fertilizer. This study demonstrated that water-based surface modification is a low-cost and effective method for improvement and promotion of controlled release P fertilizers. Phosphorus (P) is an essential nutrient for maintaining healthy crop growth, reproduction and yield 1-3 . However, farmers tend to apply excessive amount of P fertilizers in order to obtain high yields 4 , resulting in degradation of microbial community activity and soil tilth 5 , decrease in crop quality 6 , and varying forms of water pollution 7 . Meanwhile, P fertilizers are mainly derived from P rock, a non-renewable resource. With the increasing use of P fertilizer, the global P reserve is facing serious concerns 8 . Innovative technologies for improving the utilization efficiency and reducing the production cost of P fertilizers are urgently needed.Controlled-release fertilizers have been proved to improve the utilization efficiency of both nitrogen (N) and P fertilizer 9,10 . While much research has been conducted on controlled-release N fertilizers 11,12 , relatively much less work has focused on controlled-release P fertilizers. Chemically bound P in soil could become available to plant under certain biogeochemical conditions, serving as a natural reservoir of "slow-release" P 13 . However, the slow release characteristics of soil bound P are affected by many uncontrollable factors, such as temperature, humidity, organic acid secreted by crop roots, soil pH, and soil mineral composition [14][15][16][17] . Thus, P released under these conditions cannot fulfill the crop P demand, especially during the critical growth period. Recent research indicated that the fixed rate of soil P was closely related to the concentration of P in soil solution 18 . Coated P fertilizers have advantages over conventional P fertilizers in that the polymer coating prevents direct contact between soil and fertilizer, thus the controlled release of P promotes uptake by plants and reduces P fix...

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Section: Resultsmentioning

confidence: 99%

Water Polishing improved controlled-release characteristics and fertilizer efficiency of castor oil-based polyurethane coated diammonium phosphate

Lu¹,

Tian²,

Zhang³

et al. 2020

Sci Rep

Self Cite

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“… 8 One-time fertilization of CRP could meet the nutrient supply of crops for the whole growing period, 8 , 9 which is a novel solution to the challenges posed by current conventional fertilization practices. Lu 10 made coated diammonium phosphate (CDAP) using polyolefin wax surface modification and coating polyurethane made from castor oil, which showed that the wax-modified CDAP had a better controlled-release performance with the ideal “S” shape when compared with conventional diammonium phosphate (DAP). Yaseen 11 found that after coating DAP, the polymer layer surrounding fertilizer grains reduced the adsorption and precipitation of P in the soil, thus enhancing the availability of P to plants and encouraging plant growth and development.…”

Section: Introductionmentioning

confidence: 99%

Effect of Coated Diammonium Phosphate Combined with Paecilomyces variotii Extracts on Soil Available Nutrients, Photosynthesis-Related Enzyme Activities, Endogenous Hormones, and Maize Yield

Chen

Shi

et al. 2022

ACS Omega

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Coated diammonium phosphate (CDAP) is intended to release nutrients steadily in response to the demand of crop growth. A novel biostimulant extracted from Paecilomyces variotii has been shown to regulate gene expression in nutrient transport, enhance nitrogen (N) and phosphorus (P) uptake, and improve nutrient use efficiency. The application of CDAP combined with the Paecilomyces variotii extracts (ZNC) in maize is an efficient approach for reducing waste of resources, improving nutrient supply, and maintaining production stability. The effects of CDAP combined with ZNC on photosynthesis, enzyme activities, endogenous hormone content, maize yield, and P use efficiency (PUE) were investigated in this study. In a pot experiment, CDAP and diammonium phosphate (DAP) were tested together with P levels (1.80, 1.44 g pot –1 , P 2 O 5 ) and two ZNC application rates (0, 4.4 μg pot –1 ), which included the control treatment that had no P fertilizer added. Results showed that the key influencing elements of maize growth and yield were the soil available-P content, endogenous hormone content, and plant photosynthesis in this study. The combination of DAP and ZNC increased the soil available-P content and the auxin content in leaves at the key stage and hence increased the yield and PUE of maize, compared with DAP. The net photosynthetic rate of CDAP combined with ZNC was higher by 23.1% than that of CDAP alone, as well as by 32.0% than that of DAP combined with ZNC. Moreover, the combination of CDAP and ZNC increased the yield and PUE by 8.2% and 15.6 percentage points compared with DAP combined with ZNC while increasing the yield and PUE compared with CDAP. In conclusion, combining CDAP with ZNC as an environmentally friendly fertilizer could improve photosynthesis-related enzyme activity and enhance the net photosynthetic rate, resulting in an increase in maize yield and PUE significantly.

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“…The resin-coated CRU (43% N) had a 3-month release period, the innermost core fertilizer surface modification was composed of 0.5% paraffin wax (Sinopharm Chemical Reagent Co., Ltd, Beijing, China); and the outer coating was 4.0% bio-based polyurethane derived from castor oil (Yi Hai Oil Industry Co., Ltd and Wanhua Polyurethane Co., Ltd, respectively, Yantai, China). 23 The FA particles (Shandong Quanlin Jiayou Fertilizer Company Ltd, Liaocheng, China) (Fig. S2) had pH 5.40 (with FA to water ratio 1:2.5), total N 20 g kg −1 , and K 2 O 30 g kg −1 .…”

Section: Study Site and Materialsmentioning

confidence: 99%

Controlled‐release urea combined with fulvic acid enhanced carbon/nitrogen metabolic processes and maize growth

Chen

Gao

et al. 2021

J Sci Food Agric

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BACKGROUND: Controlled-release urea (CRU) or fulvic acid (FA), when applied, have been shown to increase nitrogen (N) use efficiency (NUE) or to stimulate plant growth, yet their interactive effects are not well explored. The objective of this study was to investigate the synergistic mechanisms of CRU combined with FA (CRU + FA) on maize (Zea mays L.) growth. Through the experimental design with five treatments, the N metabolism through the transcriptomic analysis of maize leaf, endogenous hormones, photosynthesis enzymes in maize leaf and root, and maize yield and NUE were evaluated.RESULTS: Compared with CRU treatment, CRU + FA treatment significantly increased auxin, nitrate reductase, and glutamate dehydrogenase in leaf by 35.4%, 43.9%, 40.8% and 19.5%, respectively, as well as, the relative content of the leaf chlorophyll and photosynthetic rate by 14.8% and 45.6%, respectively, at 12-leaf collar stage; the carbon/nitrogen (C/N) metabolic process was significantly enriched in CRU + FA treatment by 312 and 418 genes, according to transcriptome profiles of C/N metabolic in leaves from various fertilizer treated maize; maize yield and NUE of CRU + FA treatment were increased by 6.3% and 38.4%, respectively.CONCLUSIONS: These results demonstrated that CRU + FA is a viable fertilization scheme that can enhance maize growth, yield and NUE through their synergies in improving N uptake, promoting photosynthesis, increasing C/N metabolic processes, and enhancing enzyme activities.

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Polyolefin Wax Modification Improved Characteristics of Nutrient Release from Biopolymer-Coated Phosphorus Fertilizers

Cited by 37 publications

References 35 publications

Water Polishing improved controlled-release characteristics and fertilizer efficiency of castor oil-based polyurethane coated diammonium phosphate

Water Polishing improved controlled-release characteristics and fertilizer efficiency of castor oil-based polyurethane coated diammonium phosphate

Effect of Coated Diammonium Phosphate Combined with Paecilomyces variotii Extracts on Soil Available Nutrients, Photosynthesis-Related Enzyme Activities, Endogenous Hormones, and Maize Yield

Controlled‐release urea combined with fulvic acid enhanced carbon/nitrogen metabolic processes and maize growth

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