Effect of the Form and Nature of Nitrogen on Growth and Nodulation of Pigeon Pea (&amp;lt;i&amp;gt;Cajanus cajan&amp;lt;/i&amp;gt; (L.) Millsp) on Sandy Soil of Mont-Amba, in Democratic Republic of Congo

Muyayabantu, G. M.; Kabwe, Nicolas Mutamba Mulaja; Mutombo, Jean Michel Tshibamba; Dikand, Kadiata Bakach

doi:10.4236/ajps.2019.108103

AJPS

2019

DOI: 10.4236/ajps.2019.108103

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Effect of the Form and Nature of Nitrogen on Growth and Nodulation of Pigeon Pea (<i>Cajanus cajan</i> (L.) Millsp) on Sandy Soil of Mont-Amba, in Democratic Republic of Congo

G. M. Muyayabantu¹,

Nicolas Mutamba Mulaja Kabwe²,

Jean Michel Tshibamba Mutombo³

et al.

Abstract: The study was carried out on the impact assessment of the form and nature of the different nitrogen sources used in culture on growth and nodulation of pigeon pea (Cajanus cajan (L.) Millsp) during 3 months of observation on sandy soil of Mount Amba (at the University of Kinshasa in the Democratic Republic of Congo). Height and collar diameter growth, underground and total biomass dry weight, number and dry pea nodules and nodulation index have been evaluated at 4, 6, 8, 10 and 12 weeks of growth to assess the… Show more

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Cited by 3 publications

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Improved crop productivity and soil properties under varying planting densities of Pentaclethra macrophylla Benth. and Acacia auriculiformis A. Cunn. in Congo Basin

Mapenzi,

Katayi,

Bauters

et al. 2023

Agroforest Syst

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Soil fertility depletion is a major constraint to agricultural production in the Congo Basin and is aggravated by climate change. Therefore, agroforestry systems (AFS) are used to improve soil fertility and crop productivity. Indeed, Pentaclethra macrophylla and Acacia auriculiformis are among the most agroforestry species used in this basin. However, smallholders are limited in their choice of agroforestry species and the spacing. Hence, this study comparatively evaluated the effects of P. macrophylla (native) and A. auriculiformis (exotic) legume tree species on soil macronutrients and food crops’ yield during four cropping seasons. To do this, a multifactor trial design was implemented in Lobilo catchment, Congo Basin, with two tree species, four tree planting densities (T1: 2500 trees × ha−1, T2: 625 trees × ha−1, T3: 278 trees × ha−1; and T0: crop monoculture), and three intercrops (cassava, maize, and peanut). The results revealed that both agroforestry species did not significantly differ regarding their impact on soil macronutrients. The total nitrogen and the pH in soil have increased with the cropping seasons. With regard to the food crops, cassava and maize yield were greater under P. macrophylla than under A. auriculiformis. However, the 2500 trees × ha−1 density negatively affected food crops’ yield and did not allow food crop production after the second cropping season. To maximize the positive effects of these AFS, it is essential to plant or co-plant these two agroforestry species at 625 trees × ha−1 density. Future research could investigate other native species and include water and light interactions.

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Improved crop productivity and soil properties under varying planting densities of Pentaclethra macrophylla Benth. and Acacia auriculiformis A. Cunn. in Congo Basin

Mapenzi,

Katayi,

Bauters

et al. 2023

Agroforest Syst

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Improving soil chemical properties and tef (Eragrostis tef) productivity with Acacia decurrens‐based fallow in northwestern Ethiopia

Tadele,

Adgo,

Meshesha

2024

Soil Use and Management

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Following land degradation and the associated reduction in crop production, smallholder farmers in the highlands of northwestern Ethiopia have recently practiced Acacia decurrens‐based fallow system. Despite the rapid expansion of this new cropping system, its effect on soil properties and crop productivity has never been exhaustively studied. We assessed the effects of A. decurrens‐based fallow system on soil properties and tef (Eragrostis tef) productivity under the existing production environment on farmers' fields using: (i) tef cultivation under the fallow system in two rotations which represent 5 and 10 years of continuous fallow period (fallowed lands); (ii) conventional tef cultivation system (ST system); (iii) tef cultivation on fallowed lands in the first rotation for two consecutive years; (iv) ST system adjoining a 4‐year‐old acacia woodlot; and (v) interview with local farmers. The results showed that fallowed lands in the first and second rotations improved soil properties and tef productivity with greater effects in the second rotation. Compared to the ST system, fallowed lands in both rotations significantly increased soil pH, soil organic carbon (SOC), available P, total N and cation exchange capacity (CEC), but decreased exchangeable Al3+. Tef aboveground biomass and grain yields were increased by 74% and 93% in the first rotation and 103% and 167% in the second rotation over the ST system, respectively. Similarly, height was increased by 9% in the first rotation and 17% in the second rotation. Fallowed lands sustained positive effects on soil fertility and tef productivity over two successive production years highlighting that the fallow system can benefit farmers through the cultivation of two annual crops in 2 years. Significant tef yield reductions occurred over the first 10 m distance from the acacia woodlot. Soil moisture, pH, SOC, available P, total N and CEC were higher at croplands close to the acacia woodlot. According to the farmers, the fallow system can improve tef productivity and reduce the need for inorganic fertilizer by 50%. Overall, the results demonstrated that fallowing with A. decurrens can reduce soil acidity and restore nutrients for sustainable crop production; and the shading effect could be the limiting factor for tef production on croplands adjacent to the acacia woodlots.

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EFFECT OF Gliricidia sepium LEAFY BIOMASS AND NPK (15:15:15) FERTILISER ON THE GROWTH AND YIELD OF TOMATO, Solanum lycopersicum (L.)

MOHAMMED,

NARTEY,

ADDAI

et al. 2023

JALSE

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The use of organic amendments and appropriate nutrient management practices is essential for sustainable agricultural production. The present study investigated the effect of Gliricidia sepium leafy biomass and NPK (15:15:15) on the growth and yield of tomato plants (Solanum lycopersicum L.). A randomised complete block design with five treatments and four replicates was employed in this experiment. The treatments included T1 (Control), T2 (100% G. sepium leafy biomass), T3 (25% G. sepium leafy biomass + 75% NPK fertiliser), T4 (50% G. sepium leafy biomass + 50% NPK), T5 (100% NPK), and T6 (75% G. sepium leafy biomass + 25% NPK). The application of G. sepium leafy biomass and NPK had significant effects on tomato growth and yield (p˂0.05). The combined application of G. sepium leafy biomass and NPK (T4) and the sole application of G. sepium leafy biomass (T2) resulted in the highest plant height, stem girth, and fruit yield compared to the other treatments. Additionally, treatment with 75% Gliricidia leafy biomass and 25% NPK fertiliser (T6) resulted in a superior fruit weight compared to the other treatments. The application of G. sepium leafy biomass (T2) alone and NPK alone (T5) showed a significant improvement in plant growth parameters and fruit yield compared to the control (T1), although the effects were not as pronounced when combined with NPK (T4). The application of NPK fertiliser (T3) also positively influenced plant growth and yield, but the effects were lower compared to T2, T4, and T6. Further studies are warranted to optimise the application rates of G. sepium leafy biomass and NPK for different tomato cultivars and growing conditions.

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Effect of the Form and Nature of Nitrogen on Growth and Nodulation of Pigeon Pea (<i>Cajanus cajan</i> (L.) Millsp) on Sandy Soil of Mont-Amba, in Democratic Republic of Congo

Cited by 3 publications

References 18 publications

Improved crop productivity and soil properties under varying planting densities of Pentaclethra macrophylla Benth. and Acacia auriculiformis A. Cunn. in Congo Basin

Improved crop productivity and soil properties under varying planting densities of Pentaclethra macrophylla Benth. and Acacia auriculiformis A. Cunn. in Congo Basin

Improving soil chemical properties and tef (Eragrostis tef) productivity with Acacia decurrens‐based fallow in northwestern Ethiopia

EFFECT OF Gliricidia sepium LEAFY BIOMASS AND NPK (15:15:15) FERTILISER ON THE GROWTH AND YIELD OF TOMATO, Solanum lycopersicum (L.)

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