Soybean, cowpea, groundnut, and pigeonpea response to soils, rainfall, and cropping season in the forest margins of Cameroon

Wendt, John; Atemkeng, Maureen Fonji

doi:10.1023/b:plso.0000047731.35668.e0

Cited by 9 publications

(6 citation statements)

References 22 publications

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Section: Discussionsupporting

confidence: 85%

“…The soybean grain yield in the control plots for this study is within the range of 448–709 kg ha –1 that was previously reported by Wendt and Atemkeng (2004) , across the first and second planting seasons in the humid forest ecosystem of Cameroon. However, treatment applications in this study increased the soybean grain yield relative to the control and the previously reported yield by Wendt and Atemkeng (2004) . Inoculating PGPB and AMF with or without NPK fertilizer significantly increased soybean yield as compared to the control, which supports the third hypothesis that PGPB and AMF will increase soybean grain yield and nutrient contents ( Thioub et al, 2017 ).…”

Section: Discussionsupporting

confidence: 85%

“…Hence, there is a challenge to increase domestic supply to meet agro-industrial demand, which is indicative of the enthusiasm of farmers for soybean production. Wendt and Atemkeng (2004) reported soybean yield ranging between 448 and 709 kg/ha across the first and second planting seasons, with a significant effect of soil nutrients (especially magnesium content) on soybean yield.…”

Section: Introductionmentioning

confidence: 99%

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Inoculating plant growth-promoting bacteria and arbuscular mycorrhiza fungi modulates rhizosphere acid phosphatase and nodulation activities and enhance the productivity of soybean (Glycine max)

et al. 2022

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Soybean [Glycine max (L.) Merrill] cultivation is important for its dual role as rich source of dietary protein and soil fertility enhancer, but production is constrained by soil nutrient deficiencies. This is often resolved using chemical fertilizers that exert deleterious effects on the environment when applied in excess. This field study was conducted at Nkolbisson-Yaoundé in the agro-ecological zone V of Cameroon to assess the performance of soybean when inoculated with plant growth-promoting bacteria (PGPB) and arbuscular mycorrhiza fungi (AMF), with or without NPK fertilizer addition. Ten treatments (Control, PGPB, AMF, PGPB+AMF, PGPB+N, PGPB+PK, PGPB+N+PK, PGPB+AMF+N, PGPB+AMF+PK, and PGPB+AMF+N+PK) were established in a randomized complete block design with three replicates. Mycorrhizal colonization was only observed in AMF-inoculated soybean roots. In comparison to control, sole inoculation of PGPB and AMF increased the number of root nodules by 67.2% and 57%, respectively. Co-application of PGPB and AMF increased the number of root nodules by 68.4%, while the addition of NPK fertilizers significantly increased the number of root nodules by 66.9–68.6% compared to control. Acid phosphatase activity in soybean rhizosphere ranged from 46.1 to 85.1 mg h–1 kg–1 and differed significantly across treatments (p < 0.001). When compared to control, PGPB or AMF or their co-inoculation, and the addition of NPK fertilizers increased the acid phosphatase activity by 45.8%, 27%, 37.6%, and 26.2–37.2%, respectively. Sole inoculation of PGPB or AMF and their integration with NPK fertilizer increased soybean yield and grain contents (e.g., carbohydrate, protein, zinc, and iron) compared to the control (p < 0.001). Soil phosphorus correlated significantly (p < 0.05) with soybean grain protein (r = 0.46) and carbohydrate (r = 0.41) contents. The effective root nodules correlated significantly (p < 0.001) with acid phosphatase (r = 0.67) and soybean yield (r = 0.66). Acid phosphatase correlated significantly (p < 0.001) with soybean grain yield (r = 0.63) and carbohydrate (r = 0.61) content. Effective root nodules correlated significantly with carbohydrate (r = 0.87, p < 0.001), protein (r = 0.46, p < 0.01), zinc (r = 0.59, p < 0.001), and iron (r = 0.77, p < 0.01) contents in soybean grains. Overall, these findings indicate strong relationships between farm management practices, microbial activities in the rhizosphere, and soybean performance.

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Section: Discussionsupporting

confidence: 85%

Section: Discussionsupporting

confidence: 85%

Section: Introductionmentioning

confidence: 99%

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Inoculating plant growth-promoting bacteria and arbuscular mycorrhiza fungi modulates rhizosphere acid phosphatase and nodulation activities and enhance the productivity of soybean (Glycine max)

et al. 2022

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“…But they are more attractive to the farmers both for food and cash (Giller and Wilson 1991). Cowpea and soybean are increasingly being used to improve the low input cropping systems of the HFB of southern Cameroon (Wendt and Atemkeng 2004). However, in the acid soils of southern Cameroon, there is lack of information on the mechanisms governing efficient acquisition of P by legumes and the potential of P-efficient and Al-resistant grain legume genotypes to improve the P availability to crops subsequently grown in rotation.…”

Section: Introductionmentioning

confidence: 99%

Phosphorus benefits from grain-legume crops to subsequent maize grown on acid soils of southern Cameroon

et al. 2006

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We conducted field experiments over 2 years on two acid soils of southern Cameroon to test whether efficient uptake and use of phosphorus (P) from less available sources by grain legume genotypes could benefit subsequent rotational maize. We grew two crops each year. For the first crop we grew 4 genotypes of soybean and of cowpea, plus maize. For the second crop we grew maize. The first crops were fertilized with 0, 90 kg P ha )1 as phosphate rock (PR) or 30 kg P ha )1 as triple super phosphate (TSP). P application highly significantly increased shoot dry matter, P uptake, N 2 fixation and grain yields of the grain legumes with TSP generally more effective than PR. Two of the soybean and two of the cowpea genotypes were more efficient at using P. Only the P-efficient soybean and cowpea genotypes increased subsequent maize yields. Yields of the subsequent maize grown in rotation were significantly correlated with shoot P uptake for which the quantity of P applied with the crop residues of the pre-crop appeared to be a major factor.We also grew the grain legumes in nutrient solutions and measured organic acid-anion exudation from roots, root-surface phosphatase-activity, and root morphological characteristics. Enhanced exudation of organic acid anions from roots of Pdeprived plants might have contributed to the P acquisition efficiency under field conditions of the P-efficient cowpea genotypes and one of the Pefficient soybean genotypes. A higher activity of root-surface acid phosphatase might have been important for the other P-efficient soybean genotype. The results show, that the potential positive rotational effect of cowpea and soybean on the acid, highly P-sorbing soils of southern Cameroon depends on breeding and using P-efficient genotypes when sparingly soluble and suboptimal rates of soluble P fertilizers are used.

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“…Additional research work will be conducted to support this hypothesis. Grain yield of the soybean genotypes TGm 1566, TGm 1511, and TGm 1039 was particularly higher compared to other genotypes previously grown on these soils (Wendt and Atemkeng 2004). Such findings provide useful information to farmers to increase yield production and to breeders for the possibility of improving soybean grain yield on soils with low available P in southern Cameroon.…”

Section: Discussionmentioning

confidence: 92%

Biological nitrogen fixation potential by soybeans in two low-P soils of southern Cameroon

Jemo

Nolte

Tchienkoua

et al. 2008

Nutr Cycl Agroecosyst

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Biological nitrogen fixation (BNF) potential of 12 soybean genotypes was evaluated in conditions of low and sufficient phosphorus (P) supply in two acid soils of southern Cameroon. The P sources were phosphate rock (PR) and triple superphosphate (TSP). The experiment was carried out during two consecutive years (2001 and 2002) at two locations with different soil types. Shoot dry matter, nodule dry matter, and nitrogen (N) and P uptake were assessed at flowering and the grain yield at maturity. Shoot dry matter, nodule dry matter, N and P uptake, and grain yield varied significantly with site and genotypes (P \ 0.05). On Typic Kandiudult soil, nodule dry matter ranged from 0.3 to 99.3 mg plant -1 and increased significantly with P application (P \ 0.05). Total N uptake of soybean ranged from 38.3 to 60.

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Soybean, cowpea, groundnut, and pigeonpea response to soils, rainfall, and cropping season in the forest margins of Cameroon

Cited by 9 publications

References 22 publications

Inoculating plant growth-promoting bacteria and arbuscular mycorrhiza fungi modulates rhizosphere acid phosphatase and nodulation activities and enhance the productivity of soybean (Glycine max)

Inoculating plant growth-promoting bacteria and arbuscular mycorrhiza fungi modulates rhizosphere acid phosphatase and nodulation activities and enhance the productivity of soybean (Glycine max)

Phosphorus benefits from grain-legume crops to subsequent maize grown on acid soils of southern Cameroon

Biological nitrogen fixation potential by soybeans in two low-P soils of southern Cameroon

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