Ammonia volatilization following urea application at maize fields in the East African highlands with different soil properties

Zheng, Jinsen; Kilasara, Method; Mmari, William N.; Funakawa, Shinya

doi:10.1007/s00374-018-1270-0

Cited by 33 publications

(15 citation statements)

References 35 publications

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“…Research on mitigating ammonia loss has provided important insights for designing effective mitigation strategies targeting different agroecological zones 56 – 58 . A simple drip irrigation system is easy to structure and can achieve the same effect as deep application of urea in managing ammonia loss 59 . The results of this study showed that manipulation of both dripline spacing and the rate of fertilization could be used to reduce the amount of ammonia volatilization in the summer maize season.…”

Section: Discussionmentioning

confidence: 99%

Effects of fertilizer under different dripline spacings on summer maize in northern China

Bai

Wang

et al. 2021

Sci Rep

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Maximizing grain yields with effective fertilization technologies and minimizing nitrogen losses is essential in agroecosystems. In this research, we conducted a two-year field experiment to explore whether dripline spacing and fertilization rate would affect maize grain yield. Two dripline spacings (i.e., one drip line per row of maize with a row space of 60 cm and one drip line per two rows of maize) and two fertilization rates (i.e., high fertilization level: N, 180 kg ha−1; P2O5, 90 kg ha−1; and K2O, 90 kg ha−1 and low level: N, 139.5 kg ha−1; P2O5, 76.5 kg ha−1; and K2O, 76.5 kg ha−1) were employed in this research. The results showed that maize yield was significantly affected by both dripline spacing and fertilization rate. The maize yield was 10.2% higher in the treatment with one drip line per two rows than that in the treatment with one drip line per row. Maize yield increased by 10.9% at the high fertilization level compared to that at the low fertilization level. The quantity of cumulative ammonia volatilization was reduced by 15.1% with one drip line per two rows compared to that with one drip line per row, whereas it increased by 26.9% at the high fertilization level compared with that at the low fertilization level. These results indicated that one drip line per two rows with a high fertilization rate increased the yield and could reduce the environmental burden, which may be economically beneficial and environmentally sound for maize fertigation for green agricultural development.

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Section: Discussionmentioning

confidence: 99%

Effects of fertilizer under different dripline spacings on summer maize in northern China

Bai

Wang

et al. 2021

Sci Rep

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“…The loss of N as NH 3 causes a hostile situation between using this resource and eco-environmental conservation, driving even a low e ciency of this type of fertilizer when applied to a crop (Zheng et al 2018). In addition to this problem, there is a pollution of the atmosphere, soil acidi cation, eutrophication, and a decrease in biodiversity (Scudlark et al 2005).…”

Section: Introductionmentioning

confidence: 99%

Ramularia leaf spot and Boll rot are affected differently by organic and inorganic nitrogen fertilization in cotton plants

Palma-Zambrano

Gavilanes

Portalanza

et al. 2021

Preprint

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Background: In this work, the interaction among nitrogen fertilization using bovine manure, poultry manure, Jatropha curcas seed cake and urea, and the diseases Ramularia leaf spot (RLS) and Boll rot (BR), caused by Ramulariopsis pseudoglycines and Diplodia gossypina, respectively, on cotton plants (Gossypium hirsutum L.), was studied under field conditions. The intensity (incidence and severity in percentage) of RLS and the incidence (%) of BR were evaluated six times, starting in the reproductive stage B1 (first visible flower bud). A randomized complete block experimental design with a 4x4 factorial arrangement (fertilizers x dose), totaling 16 treatments were used. The disease progress was analyzed with the nonlinear Logistic and Gomperts models, obtaining the initial disease's epidemiological parameters (Y0) and progress rate (r). Results: Cotton plants fertilized with 100 kg N ha-1 of J. curcas seed cake and poultry manure with 100 and 200 kg N ha-1 showed an incidence between 16 and 21% of RLS. In contrast, plants fertilized with bovine manure presented the highest incidence of ramularia leaf spot (33%). Regarding factor B (dose), cotton plants fertilized with 50 kg N ha-1, showed a higher percentage of BR incidence, being different from those fertilized with the other doses. In the analysis of the interaction corresponding to the BR incidence, no response pattern was found in the doses for each fertilizer. No correlation was observed between the three health variables analyzed, finding probabilities between 0.002 and 0.892. In the temporal progress of RLS incidence, it was shown that fertilization with J. curcas seedcake and poultry manure was lower than the rest. In severity, the plants were fertilized by J. curcas seedcake concerning the rest. The progression curve of RLS severity temporarily increased similarly, observing that plants fertilized with higher doses reached a lower final proportion of the disease.Regarding the modeling of epidemics using the nonlinear Logistic and Gompertz models, the first model better represented the RLS, except for factor B, where none of the curves was significant. In the Logistic model, a lower amount of initial disease was found (Y0) of RLS, both in incidence (0.259) as in severity (0.081), in plants fertilized with J. curcas seed cake and poultry manure, compared to the rest. For the case of BR incidence, none of the nonlinear models used could be represented.Conclusions: Plants fertilized with 50 kg N ha-1, presented an incidence twice higher than those obtained with other fertilizers. The Logistic model better fits RLS, but no model was adapted to BR. Only the RLS epidemiological parameters were affected differently in this experiment compared to BR disease.

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“…x urea is surface-applied to light soils (due to low cation exchange capacity), x with high temperatures and moisture content [2,7,8],…”

Section: Introductionmentioning

confidence: 99%

“…Liquid urease inhibitor is uniformly sprayed to granulated urea, inhibitor lead to extension of nutrients availability period for plants, creates favorable conditions for seed germination and the start of vegetation, reduces the phytotoxic effect of fertilizers on the plant. Compared to conventional urea, nBPT protects the fertilizer from the action of urease during hydrolysis after its application to the soil, which provides the delay of the transformation of amide nitrogen into ammonia for 10-15 days [9,7]. This contributes to the losses reduction of nitrogen in form of ammonia up to 60% compared to losses from conventional urea, even compared to the incorporation it into the soil [6,10].…”

Section: Introductionmentioning

confidence: 99%

The efficiency of application urea with urease inhibitor to increase potato yield

et al. 2021

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In the article are presented the investigation results, which shows the effectiveness of urea with urease inhibitor – nBPT in potato growing agroecosystems. The advantages of the new fertilizer are the yield increase, and quality improvement. Urea with nBPT lead to formation bigger tuber size what is one of the most important characteristic for marketable potato. Fertilizer was tested in experimental fields and in real farm conditions.

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Ammonia volatilization following urea application at maize fields in the East African highlands with different soil properties

Cited by 33 publications

References 35 publications

Effects of fertilizer under different dripline spacings on summer maize in northern China

Effects of fertilizer under different dripline spacings on summer maize in northern China

Ramularia leaf spot and Boll rot are affected differently by organic and inorganic nitrogen fertilization in cotton plants

The efficiency of application urea with urease inhibitor to increase potato yield

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