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Ibewiro, B; Sanginga, N.; Vanlauwe, Bernard; Merckx, Roel

doi:10.1023/a:1009846203062

Cited by 62 publications

(12 citation statements)

References 17 publications

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“…Although we don't seem reasoning for finding higher C:N ratio (13.2) and higher k rate (0.262) in Rongai during the wet season, it was expected to find low k rate in presence of high C:N ratio [26,27] or low C:N ratio for our higher k rate under wetter conditions. However, for the dry season, our results were more similar to the C:N values of 9:1 in mixture of leaves and stems of Velvet bean and 10: 8 in shoots of "Rongai" reported by Ibewiro et al [28].…”

Section: Yield Decomposition Rate and N Contentsupporting

confidence: 90%

Yield, Decomposition, Mineralization and Nitrification of Annual Legumes in an Oxisol

et al. 2018

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Knowledge about seasonal and litter bag soil position effects on litter decomposition (k value), mineralization and nitrification rate of annual legumes in Puerto Rico is limited. This study determined dry matter yield (DMY), k value of litter bags placed below and above the soil surface, mineralization and nitrification rates of Lablab purpureus cv. “Rongai” and Mucuna pruriens (Velvet bean) seeded in the wet and dry season in Oxisol soils (Typic Eustrustox). There was an interaction (p < 0.05) for season and legumes on DMY, k value and N content. “Rongai” DMY was higher for the dry than wet season while Velvet bean had an opposite seasonal response. Higher k value occurred in the wet season for legumes, but “Rongai” had higher k than Velvet bean. For both legumes, N content was higher on litter bag placed below-ground in both seasons. However, in the wet season, there was less N in the above ground litter position. Higher inorganic N was observed at 90 days of soil incubation (DOI) suggesting that N was not available prior to 42 DOI. Nitrification rate was higher for “Rongai” at 22 DOI and lower at 42 and 90 DOI for both legumes. Both legumes enhanced inorganic N, but, regardless of season, Rongai supplied nutrients to the soil faster than Velvet bean. “Rongai” because of its higher k value than Velvet bean is recommended for fast growing row or vegetable crops in Puerto Rico.

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Section: Yield Decomposition Rate and N Contentsupporting

confidence: 90%

Yield, Decomposition, Mineralization and Nitrification of Annual Legumes in an Oxisol

et al. 2018

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“…Despite this decline, however, lablab appears to persist as a garden crop (rather than a field crop) in eastern and southern Africa; and recent market surveys from eastern Africa suggest that there is a high demand (and subsequently a good price) for lablab in Kenya (Ngailo et al 2003). There is almost no ongoing lablab research in Africa, except for programs focusing on improving soil properties by using green-manure/forage crops, such as in maize-based systems of Kenya (Mureithi et al 2003; Cheruiyot et al 2007; Lelei et al 2009), Malawi (Sakala et al 2004) and Nigeria (e.g., Ibewiro et al 2000; Amodu et al 2004; Gbaraneh et al 2004; Rahman and Ogungbile 2006), or sorghum- and millet-based systems in the semi-arid tropics of Mali (Kouyaté et al 2000). Almost all of these African initiatives have included and continue to include one popular late-maturing forage cultivar, cv.…”

Section: Four Thesesmentioning

confidence: 99%

Lablab purpureus—A Crop Lost for Africa?

Maass

Knox

Venkatesha

et al. 2010

Tropical Plant Biol.

127

113

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In recent years, so-called ‘lost crops’ have been appraised in a number of reviews, among them Lablab purpureus in the context of African vegetable species. This crop cannot truly be considered ‘lost’ because worldwide more than 150 common names are applied to it. Based on a comprehensive literature review, this paper aims to put forward four theses, (i) Lablab is one of the most diverse domesticated legume species and has multiple uses. Although its largest agro-morphological diversity occurs in South Asia, its origin appears to be Africa. (ii) Crop improvement in South Asia is based on limited genetic diversity. (iii) The restricted research and development performed in Africa focuses either on improving forage or soil properties mostly through one popular cultivar, Rongai, while the available diversity of lablab in Africa might be under threat of genetic erosion. (iv) Lablab is better adapted to drought than common beans (Phaseolus vulgaris) or cowpea (Vigna unguiculata), both of which have been preferred to lablab in African agricultural production systems. Lablab might offer comparable opportunities for African agriculture in the view of global change. Its wide potential for adaptation throughout eastern and southern Africa is shown with a GIS (geographic information systems) approach.

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“…A positive yield response to crop straw retention in the wheat–maize cropping system was also found by Dikgwatlhe 36 . N nutrient release from decomposing crop residues could be synchronised with crop demand 37 . The residue decomposition and N nutrient release is thus a pre-requisite for optimising N-use efficiency by crop.…”

Section: Discussionmentioning

confidence: 99%

The influence of a year-round tillage and residue management model on soil N fractions in a wheat-maize cropping system in central China

Ye¹,

Ye²,

Chai³

et al. 2019

Sci Rep

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Tillage practice and residue management play important roles in N pool in soils. This study determined the impacts of tillage practice and residue management on crop yield. It also investigated the distribution, fractionation, and stratification of N at soil at depths ranging from 0 to 60 cm under wheat–maize cropping systems. Three treatments were established in 2009: no-tillage with straw removal for winter wheat and summer maize (NT), no-tillage with straw mulching for winter wheat and summer maize (NTS), no-tillage with straw mulching for summer maize and plow tillage with straw incorporation for winter wheat (NPTS). After 8 years, soil total nitrogen (TN) content in NTS was greater than in NT, but only in 0–10 cm layer. NPTS treatment increased TN content over NT and NTS in 10–20 cm layer by 18.0% and 13.9%, and by 16.8% and 18.1% in 20–30 cm layer, respectively. Particulate organic N, microbial biomass N and water-extractable organic N levels were the greatest in 0–10 cm layer under NTS treatment; and in 10–30 cm layer, the corresponding values were the highest under NPTS treatment. NPTS treatment could immobilize the mineral N in 10–30 cm layer, and reduced leaching losses into deeper soil layers (40–60 cm). Furthermore, total yield increased by 14.7% and 8.5% in NPTS treatment compared to NT and NTS treatments, respectively. These results indicate that NPTS is an effective and sustainable management practice, which will improve soil fertility, sustainable crop production, and environmental quality in low-productivity soils in central China.

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Untitled

Cited by 62 publications

References 17 publications

Yield, Decomposition, Mineralization and Nitrification of Annual Legumes in an Oxisol

Yield, Decomposition, Mineralization and Nitrification of Annual Legumes in an Oxisol

Lablab purpureus—A Crop Lost for Africa?

The influence of a year-round tillage and residue management model on soil N fractions in a wheat-maize cropping system in central China

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