Organic Inputs and Chemical Fertilizer on Carbon Mineralization From Two Ultisols

Kalala, Daniel; Shitumbanuma, Victor; Adamtey, Noah; Chishala, Benson H.

doi:10.5539/jas.v12n11p223

Cited by 2 publications

(6 citation statements)

References 23 publications

(26 reference statements)

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“…These results corroborate findings by Bhat et al (2015) who established that application of organic inputs either alone or in combination with chemical fertilizers resulted in 19% to 73% more N o than the control and 11% to 57% more N o than conventional treatments. The results further support findings by Kalala, Shitumbanuma, Adamtey and Benson (2020) who, working with the same soils and same inputs used in this study, established that the addition of organic inputs with or without chemical fertilizer resulted in higher carbon emissions ranging from 81 to 129% and 18 to 34% than control treatments on LS and SCL soils respectively.…”

Section: Effect Of Organic Inputs On Nitrogen Mineralizationsupporting

confidence: 90%

“…The composted cattle manure, despite having a relatively lower C/N ratio, had one of the lowest %N min which was significantly lower than all the other organic inputs on the SCL. This, as stated by Kalala et al (2020) could be as a result of the presence of more recalcitrant carbon as most of the labile carbon might have been removed during the composting process.…”

Section: Effect Of Organic Inputs On Nitrogen Mineralizationmentioning

confidence: 96%

“…Similarly, Mubarak, Gali, Mohamed, Steffens and Awadelkarim (2010) reported net N mineralization in light soils to be 2.5 to 6 times higher than in heavy soils. This, according to Kalala et al (2020) could be as a result of the protective effect of clay on soil organic matter decomposition.…”

Section: Effect Of Soil Type On N Mineralizationmentioning

confidence: 99%

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Influence of Soil Fertility Management on Nitrogen Mineralization, Urease Activity and Maize Yield

Kalala¹,

Shitumbanuma²,

Chishala³

et al. 2022

JAS

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For studying the effect of soil fertility management practices on N mineralization, urease activity and maize yield, replicated field trials were established in 2015 at Misamfu and Msekera agricultural research stations (ARS) representing two geo-climatic regions of Zambia. The soil at Msekera ARS is a sandy clay loam (SCL) from a Paleustult, while that at Misamfu is a loamy sand (LS) from a Kandiustult. The field trials had three categories of treatments namely legumes, traditional and conventional. The legumes group consisted of researcher-recommended legume-cereal intercrop systems of maize with Cajanus cajan, Crotalaria juncea and Tephrosia vogelii in combination with compound D (10% N, 20% P2O5, 10% K2O) and urea (46% N) at the recommended rate (200 kg ha-1) and half of the recommended rate (100 kg ha-1). Composted cattle manure and Fundikila, a special plant biomass management technique, were the inputs under the traditional category. The conventional category consisted of a treatment to which only chemical fertilizer was applied. Urease activity was determined in surface soil samples (0-20 cm) collected from the field trials after 3 years. For N mineralization, a laboratory incubation study was conducted over 13 weeks. For the laboratory incubation, an additional treatment to which no input was applied was included as control. Application of organic inputs significantly increased the potentially mineralizable N (No) by 127% to 256% on the LS and by 51% to 131% on the SCL in comparison to the control. Similarly, the cumulative N mineralized (Ncum) was twice or thrice higher where organic inputs had been applied in comparison to the control. The No followed the order traditional > legumes > conventional > control, while the mineralization rate constant (k) followed the order legumes > conventional > traditional > control on both soils. The rate of N mineralization was significantly higher on the LS than the SCL. Higher rates of chemical fertilizer resulted in high Ncum and higher maize yield. Maize yield was significantly and positively correlated to Ncum, but inversely correlated to the amount of applied N that was mineralized (%Nmin). Urease activity was stimulated by application of organic inputs and suppressed by higher rates of chemical fertilizers. The type of organic inputs; the rate of chemical fertilizers; and soil texture are factors influencing N mineralization and maize yield. Urease activity was largely influenced by the rate of chemical fertilizer, but not the type of organic inputs or soil texture.

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Section: Effect Of Organic Inputs On Nitrogen Mineralizationsupporting

confidence: 90%

Section: Effect Of Organic Inputs On Nitrogen Mineralizationmentioning

confidence: 96%

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Influence of Soil Fertility Management on Nitrogen Mineralization, Urease Activity and Maize Yield

Kalala¹,

Shitumbanuma²,

Chishala³

et al. 2022

JAS

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“…There was probably significant leaching of nutrients at Misamfu because of the sandy nature of the soils and the high rainfall at Misamfu. Kalala et al (2020) reported high seasonal organic matter decomposition rates of about 10.3% on the highly permeable sandy soils at Misamfu. A combination of high organic matter decomposition rates and high rainfall are conducive to high rates of leaching of nutrients.…”

Section: Effect Of Organic Amendments On Maize Grain Yieldmentioning

confidence: 97%

“…The agro-ecological conditions at Msekera were probably better suited for the use of Tephrosia vogelii and pigeon pea for improving maize production than at Misamfu. According to Kalala et al (2020), the loamy soils at Msekera had seasonal organic matter decomposition rates of about 4.9% compared to the high rates of about 10.3% observed on the sandy soils at Misamfu. The combination of the higher rainfall at Misamfu and high organic matter decomposition rates on soils with high permeability and low nutrient retention may have resulted in greater leaching of nitrogen and other nutrients at Misamfu compared to Msekera.…”

Section: Effect Of Organic Amendments On Maize Grain Yieldmentioning

confidence: 97%

Organic Inputs on Maize (Zea mays) Yield and Chemical Properties of Two Ultisols

Chabu¹,

Shitumbanuma²,

Chishala³

et al. 2022

JAS

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Effects of organic inputs (OIs) on maize grain yield and chemical properties of Ultisols were assessed at Msekera and Misamfu Agricultural Research Stations in the medium and high rainfall regions respectively of Zambia. The OIs included biomasses of the leguminous species Cajanus cajan, Tephrosia vogelii, and Crotalaria juncea, in-situ composted native grasses and shrubs called fundikila, modified fundikila using Mucuna pruriens, and composted cattle manure, with chemical fertilizer as a control. After two crop growing seasons, cattle manure significantly increased soil pH, while modified fundikila significantly increased levels of soil organic matter. At Msekera, OIs increased levels of total N by 300%. At Misamfu, fundikila and Cajanas cajan increased total N by 35%. The OIs did not significantly increase available P and K at both sites. In the first season at Msekera, OIs had a higher mean maize yield (6075±368 kg/ha) than chemical fertilizer (3567±715 kg/ha). Maize yields for OIs in the second season did not differ significantly from those of the first season. At Misamfu the leguminous OIs Cajanas cajan and Tephrosia vogelii, had a lower combined mean maize yield (5405±242 kg/ha) than chemical fertilizer (7426±430 kg/ha) in the first season. A 70% decline in maize yield occurred on plots with leguminous OIs in the second season compared to the first season. Leguminous OIs generally performed better at Msekera than at Misamfu. At both sites, the traditional OIs, cow manure at Msekera, and fundikila at Misamfu had higher maize yields than leguminous OIs. We concluded that effects of OIs on soil chemical properties and maize yield vary with soil and climatic conditions and that these need to be considered when selecting OIs for use by farmers.

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Organic Inputs and Chemical Fertilizer on Carbon Mineralization From Two Ultisols

Cited by 2 publications

References 23 publications

Influence of Soil Fertility Management on Nitrogen Mineralization, Urease Activity and Maize Yield

Influence of Soil Fertility Management on Nitrogen Mineralization, Urease Activity and Maize Yield

Organic Inputs on Maize (Zea mays) Yield and Chemical Properties of Two Ultisols

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