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Réponse du soja (Glycine max) à l'application de phosphate de Kanzi et de dolomie rose de Kimpese sur sol sableux en RD Congo

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Abstract
The sandy soil from Kinshasa's hinterland (DR Congo) is characterized by a low chemical fertility, a very limited water retention capacity, and an acidic pH with Al and Mn toxicities. The effects of Kanzi rock phosphate (PK) and Kimpese pink dolomite (DK) application on soybean (dry matter weight content, nodulation, and soybean grain yield) and chemical soil properties after cultivation were studied. Four rates of finely ground rocks (0, 199, 397 and 794 mg PK, and 0, 437, 874 and 1748 mg DK kg soil(-1)) were mixed with the topsoil, and soybean (Glycine max) was planted using a completely randomized design with three replicates. The application of PK and DK stimulated the absorption of nutrients (Ca, Mg, K and P) and increased significantly the nodulation, dry matter weight content and soybean grain yield. Application of 2.48 Mg ha(-1) PK and 5.46 Mg ha(-1) DK increased dry matter content by 112 and 191%, respectively, and seed weight by 86 and 197%, respectively. Soil analysis after cultivation illustrated that all amended soils still contained nutrients (Ca, Mg, N and P) which could produce long-term beneficial effects. Furthermore, the increased soil pH, due to the liming effect of the amendments brought about a significant increase in CEC with complete neutralization of phytotoxic exchangeable Al. The study demonstrates that the significant decrease in solubility of micronutrients (Cu, Zn, Mn and Fe) significantly reduced their absorption by plants. Kanzi rock phosphate and Kimpese pink dolomite have the potential to increase the productivity of tropical soils.
Keywords
liming effect, Sandy soil, agrominerals, soybean, soil productivity, HIGHLY WEATHERED SOILS, CHEMICAL-PROPERTIES, ALUMINUM, CALCIUM, GROWTH, ACID, POTASSIUM, FERTILITY, RHIZOBIA, WHEAT

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Chicago
Koy Kasongo, Ruben, Eric Van Ranst, Prosper Kanyankogote, Ann Verdoodt, and Geert Baert. 2012. “Réponse Du Soja (Glycine Max) à L’application De Phosphate De Kanzi Et De Dolomie Rose De Kimpese Sur Sol Sableux En RD Congo.” Canadian Journal of Soil Science 92 (6): 905–916.
APA
Koy Kasongo, R., Van Ranst, E., Kanyankogote, P., Verdoodt, A., & Baert, G. (2012). Réponse du soja (Glycine max) à l’application de phosphate de Kanzi et de dolomie rose de Kimpese sur sol sableux en RD Congo. CANADIAN JOURNAL OF SOIL SCIENCE, 92(6), 905–916.
Vancouver
1.
Koy Kasongo R, Van Ranst E, Kanyankogote P, Verdoodt A, Baert G. Réponse du soja (Glycine max) à l’application de phosphate de Kanzi et de dolomie rose de Kimpese sur sol sableux en RD Congo. CANADIAN JOURNAL OF SOIL SCIENCE. 2012;92(6):905–16.
MLA
Koy Kasongo, Ruben, Eric Van Ranst, Prosper Kanyankogote, et al. “Réponse Du Soja (Glycine Max) à L’application De Phosphate De Kanzi Et De Dolomie Rose De Kimpese Sur Sol Sableux En RD Congo.” CANADIAN JOURNAL OF SOIL SCIENCE 92.6 (2012): 905–916. Print.
@article{3082599,
  abstract     = {The sandy soil from Kinshasa's hinterland (DR Congo) is characterized by a low chemical fertility, a very limited water retention capacity, and an acidic pH with Al and Mn toxicities. The effects of Kanzi rock phosphate (PK) and Kimpese pink dolomite (DK) application on soybean (dry matter weight content, nodulation, and soybean grain yield) and chemical soil properties after cultivation were studied. Four rates of finely ground rocks (0, 199, 397 and 794 mg PK, and 0, 437, 874 and 1748 mg DK kg soil(-1)) were mixed with the topsoil, and soybean (Glycine max) was planted using a completely randomized design with three replicates. The application of PK and DK stimulated the absorption of nutrients (Ca, Mg, K and P) and increased significantly the nodulation, dry matter weight content and soybean grain yield. Application of 2.48 Mg ha(-1) PK and 5.46 Mg ha(-1) DK increased dry matter content by 112 and 191\%, respectively, and seed weight by 86 and 197\%, respectively. Soil analysis after cultivation illustrated that all amended soils still contained nutrients (Ca, Mg, N and P) which could produce long-term beneficial effects. Furthermore, the increased soil pH, due to the liming effect of the amendments brought about a significant increase in CEC with complete neutralization of phytotoxic exchangeable Al. The study demonstrates that the significant decrease in solubility of micronutrients (Cu, Zn, Mn and Fe) significantly reduced their absorption by plants. Kanzi rock phosphate and Kimpese pink dolomite have the potential to increase the productivity of tropical soils.},
  author       = {Koy Kasongo, Ruben and Van Ranst, Eric and Kanyankogote, Prosper and Verdoodt, Ann and Baert, Geert},
  issn         = {0008-4271},
  journal      = {CANADIAN JOURNAL OF SOIL SCIENCE},
  keyword      = {liming effect,Sandy soil,agrominerals,soybean,soil productivity,HIGHLY WEATHERED SOILS,CHEMICAL-PROPERTIES,ALUMINUM,CALCIUM,GROWTH,ACID,POTASSIUM,FERTILITY,RHIZOBIA,WHEAT},
  language     = {fre},
  number       = {6},
  pages        = {905--916},
  title        = {R{\'e}ponse du soja (Glycine max) {\`a} l'application de phosphate de Kanzi et de dolomie rose de Kimpese sur sol sableux en RD Congo},
  url          = {http://dx.doi.org/10.4141/CJSS2011-097},
  volume       = {92},
  year         = {2012},
}

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