@article{fdi:010077323,
  title = {{F}armyard manure improves phosphorus use efficiency in weathered {P} deficient soil},
  author = {{A}ndriamananjara, {A}. and {R}akotoson, {T}. and {R}azafimbelo, {T}. and {R}abeharisoa, {L}. and {R}azafimanantsoa, {M}. {P}. and {M}asse, {D}ominique},
  editor = {},
  language = {{ENG}},
  abstract = {{C}rop production is limited by low soil fertility in sub-{S}aharan {A}frica ({SSA}), particularly by {P} deficiency due to strong fixation by {F}e and {A}l oxyhydroxides. {O}rganic amendments are known to increase {P} availability in fertilizer and in such soils by different mechanisms. {T}his study investigated the effect of adding farmyard manure ({FYM}) versus mineral triple super phosphate ({TSP}) fertilizer on {P} availability in different cropping systems. {F}ield experiments were conducted in three succeeding summer seasons to compare two different upland cropping systems: a {B}ambara ({V}igna subterranea)-rice rotation and a rice-rice system on a highly {P} deficient {F}erralsol. {N}ine treatments including sole {TSP} at 0, 10, 20, 30 kg {P} ha(-1) year(-1), and sole {FYM} at 0, 10, 20, 30 kg {P} ha(-1) year(-1) (i.e. 100% {FYM} substitution), and combined {FYM} and {TSP} ({FYM} + {TSP}) at 20, 30 kg {P} ha(-1) year(-1) (i.e. 50% and 67% {FYM} substitution, respectively) were applied. {R}esults showed that {FYM} treatments increased {B}ambara and rice grain yields compared to {TSP} treatment alone particularly in year three. {P}hosphorus uptake efficiency was higher in {FYM} treatments combined or not with {TSP} in year three of the experiment. {T}he notable response to {FYM} was associated with increased agronomic efficiency resulting from additional {C} originating from the {FYM} with a low initial soil {C} content, (around 2%), and the effect of liming that reduced soil {P} sorption thereby improving {P} availability from {FYM}. {P}artial (67%) substitution of {TSP} by {FYM} increased grain yields of {B}ambara by 1.67 {M}g ha(-1) and of rice by 1.01 {M}g ha(-1) compared to {TSP} alone in year three at the highest {P} rate (30 kg {P} ha(-1)). {T}he effect of {FYM} could be linked to inputs of {C} and nutrients from added {FYM} and to the indirect effect on soil physico-chemical properties including soil p{H}, soil moisture, soil biological activity, low {P} capacity sorption. {T}his study confirms that application of {FYM} can help minimize rates of {TSP} applied in smallholder farms in {SSA}.},
  keywords = {{L}egume-rice cropping system ; {O}rganic fertilizer ; {P} availability ; {T}riple super phosphate ; {MADAGASCAR}},
  booktitle = {},
  journal = {{N}utrient {C}ycling in {A}groecosystems},
  volume = {115},
  numero = {3},
  pages = {407--425},
  ISSN = {1385-1314},
  year = {2019},
  DOI = {10.1007/s10705-019-10022-3},
  URL = {https://www.documentation.ird.fr/hor/fdi:010077323},
}