000			03686nab a22004457a 4500
001			G93726
003			MX-TxCIM
005			20230731213331.0
008			210714s2010 ne |||p|op||| 00| 0 eng d
022			_a1385-1314
022			_a1573-0867 (Online)
024	8		_ahttps://doi.org/10.1007/s10705-009-9325-0
040			_aMX-TxCIM
041			_aeng
090			_aCIS-6047
100	1		_aTauro, T.P. _915856
245	1	0	_aPopulation dynamics of mixed indigenous legume fallows and influence on subsequent maize following mineral P application in smallholder farming systems of Zimbabwe
260			_aDordrecht (Netherlands) : _bSpringer, _c2010.
500			_aPeer review
500			_aPeer-review: Yes - Open Access: Yes|http://science.thomsonreuters.com/cgi-bin/jrnlst/jlresults.cgi?PC=MASTER&ISSN=1385-1314
520			_aDeveloping soil fertility management options for increasing productivity of staple food crops is a challenge in most parts of Sub-Saharan Africa, where soils are constrained by nitrogen (N) and phosphorus (P) deficiencies. A study was conducted to evaluate the response of indigenous legume populations to mineral P application, and subsequently their benefits to maize yield. Mineral P was applied at 26 kg P ha−1 before legume species were sown in mixtures at 120 seeds m−2 species−1 and left to grow over two rainy seasons (2 years). Application of P increased overall biomass productivity by 20–60% within 6 months, significantly influencing the composition of non-leguminous species. Dinitrogen fixation, as determined by the N-difference method, was increased by 43–140% although legume biomass productivity was apparently limited by nutrients other than P and N. Crotalaria pallida and C. ochroleuca accounted for most of the fixed N. Improved N supply increases the abundance of non-leguminous species, particularly Conyza sumatrensis and Ageratum conyzoides. However, abundance of common weed species, Commelina benghalensis, Richardia scabra and Solanum aculeastrum, declined by up to18%. Application of P did not significantly influence productivity of those legume species that reached maturity within 3 months. There was increased N2-fixation and biomass productivity of indifallows as influenced by specific legume species responding to P application. Compared with natural (grass) fallows, indigenous legume fallows (indifallows) increased subsequent maize grain yields by ~40%. Overall, 1- and 2-year indifallows gave maize grain yields of >2 and 3 t ha−1, respectively, against <1 t ha−1 under corresponding natural fallows. Two-year indifallows with P notably increased maize yields, but the second year gave low yields regardless of P treatment. Because of their low P requirement, indigenous legume fallows have potential to stimulate maize productivity under some of the most nutrient depleted soils.
536			_aConservation Agriculture Program
546			_aText in English
594			_aINT2737
595			_aCSC
650		7	_aLegumes _2AGROVOC _91963
650		7	_aMaize _2AGROVOC _91173
650		7	_aYields _2AGROVOC _91313
650		7	_aNitrogen fixation _2AGROVOC _96247
650		7	_aBiodiversity _2AGROVOC _91403
650		7	_aSandy soils _2AGROVOC _95402
650		7	_aSoil deficiencies _2AGROVOC _931387
651		7	_2AGROVOC _94496 _aZimbabwe
700	1		_aNezomba, H. _915857
700	1		_aMtambanengwe, F. _915811
700	1		_aMapfumo, P. _93354
773	0		_tNutrient Cycling in Agroecosystems _gv. 88, no. 1, p. 91-101 _dDordrecht (Netherlands) : Springer, 2010. _wG63406 _x1385-1314
856	4		_uhttps://hdl.handle.net/20.500.12665/78 _yAccess only for CIMMYT Staff
942			_cJA _2ddc _n0
999			_c27954 _d27954