Crop-livestock integrated systems (CLIS) have been used as a strategy of sustainable agricultural intensification which integrates annual crops and livestock activities on the same area and in the same season.Poster number 1143

BERNARDI, A. C. de C.

SOUZA, G. B. de

VALLE, F.

English

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 Embracing theeS & 6 ¢ a Digital FreeoeesINTERNATIONALPOTASH INSTITUTE   Polyhalite use in pasture *)Maize andgrass integrated system fertilized with polyhalite and KClAlberto C. C.Bernardi', Gilberto B. Souza‘; Fabio Valle?() Embrapa Pecuaria Sudeste, Sao Carlos, SP Brazil, alberto.bernardi@embrapa.br;(2) ICL Fertilizers, Sao Paulo, SP, BrazilIntroductionYCrop-livestock integrated systems (CLIS) have been usedasa strategy of v Polyhalite (K,MgCa,(SO,)4.2H,0) is a mineral of natural occurrencewith largesustainable agricultural intensification which integrates annual crops and existing deposits and haspotential to be a multi-nutrient(ratio of 11.7%-K, 19%-livestock activities on the same area and in the same season S, 3.6%-Mg, and 12.1%-Ca)fertilizer for forage crop production.YProviding an adequate supply of nutrients is important for high yields and is ¥ Little information is available for the response of maize and grassto polyhalite.essential to maintain high quality and profitable yields in integrated systems. v Polyhalite may provide a slow-release fertilizer source of K, Ca, Mg, and S.¥Potassium chloride potash (58 to 62% of K,O)= the mostpotashfertilizer used G Iin Brazil accounting for over 95% of the market. oav ; - a aeHowever, there are other mineralscomposedof sulfates langbeinite,kainite, The objective of this research was to evaluate the effect of K sourcespoly . fertilizer on maize Piata grass yield and nutritional status in the ICLS.Cattle grazing rewed pasture (winter)“Corn harvest #igrasui ‘ F By .ve i  Material & methods+ Lime was not necessary,. + Sowingfertilization: N, 40 kg/ha, P,O;, 140 kg/ha; K,O,80 kg/haleoeof 201au and aeeon pro3) together with Piats Urochioa _” TOPAressingfertilizations: N, 100 kg/ha, P,O,, 20 kg/ha; K,O, 100 kg/habrizantha). with maize (Zea mays cv. -Pro3) together wi iata grass (Urochloa Treatments comprised two K sources:polyhalite and KCI (60% K,O), five ratios (polyhalite:KCI)+ Red-yellow Latosol, i.e. Haplorthox + K,O levels (0, 50, 10 e 200 kg/ ha) with 4 replications:+ Soil testing samples (0-0.2 m): v i) Control (no K, S, Mg or Ca);+ Embrapa Pecuaria Sudeste in Sao Carlos, Brazil (21 ° 57'S, 47 ° 50"W, 860 m)O pHCaCl, = 5.6, organic matter = 46 g/dm’,P,,.;,. = 11 mg/dm’, K = 1.5 mmol,/dm3, Ca = v ii) KCI 100%;36 mmol,/dm?, Mg = 14 mmol,/dm’, CEC = 72 mmol,/dm* V= 73%; S-SO, = 5 mg/dm?. v iii) KCI 87,5% + Polyhalite 12,5%;580 g/kg of sand,46 g/kg of silt and 374 g/kgofclay. v iv) KCI 50% + Polyhalite 50%;Y v) KCI 12,5% + Polyhalite 87,5%;Y vi) Polyhalite 100%;            |jaasata mia3 12.000 : i _ 8.000 . :i ' Laera)0002a| ates 4 an. oO 20 40 60 80 100 Fea aressitail oO 20 40 60 80 100FotrneaBuy g/kg1658 - 2608 1798 456 Tenant ina neaSe ea ere ee eee ee1647 - 2448 1,57 B 1,50 A1662 - 2518 1668 1,50 1 A140 8 3140 27,0 118 A 7,5 B 90 Ba 24,5 ;i oa ue 10 99 B 375 413 103 A 73 B 90 Ba 310 %wTtT :A“A 07 B 27,8 31,3, 88 A 60 B 8,0 ® 25,0 aa= bBuc kg/ha 1 APerla oe Por Paral A088 B 40,0 29,0 110 A 7,0 B 5,3 Bb 19,0 ,oesaed 110,2 AB 117 - 16,5 ABC 11,9 AB aA093 B 263 285 108 A 75 B 63 ° 163 41042 AB «17-155 ABC 10.9 B oak A7c SaTS aan: Aloe baa [oz0)| nwlal ze le bolt ane |e74,0 C 12,30 - 18,3 AB 10,7 BC CS sonclusionYMaize andgrassyield obtainedwith the polyhalite and KCI mixture was YTreatments werealsoefficient in increasing S in soil and exportation of K, Mg, and bysignificantly higher (p <0.05) than the control. maize.YThebestresults of dry matter yield of maize and Piata grass were obtained This study demonstrated that polyhalite is an alternative source of K, Ca, Mg, and Swith the treatments with the highest ratios of polyhalite. and can meetthe nutritional requirements of annual crops and pastures in a CLIS forThesevalues were 20% to 36% higher than the bestyield obtained in control healthy growth and production.(withoutfertilization).

Maize and grass integrated system fertilized with polyhalite and KCl.

http://www.alice.cnptia.embrapa.br/bitstream/doc/1121542/1/MaizeGrassIntegrated.pdf

Maize and grass integrated system fertilized with polyhalite and KCl.

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