01855naa a2200241 a 450000100080000000500110000800800410001902400530006010000200011324501510013326000090028430000200029352010910031365300150140465300260141965300160144565300130146170000180147470000190149270000250151170000160153677300610155221316572022-06-10       2021    bl uuuu     u00u1 u    #d7 ahttps://dx.doi.org/10.1021/acs.jafc.0c073332DOI1 aVALLE, S. F. do  aSynergy of phosphate-controlled release and sulfur oxidation in novel polysulfide composites for sustainable fertilization.h[electronic resource]  c2021  a2392−2402  aThe development of smart and eco-friendly fertilizers is pivotal to guarantee food security sustainably. Phosphate rock and struvite are promising alternatives for P fertilization; nevertheless, the solubility of these sources is a challenge for consistent use efficiency. Here, we propose using a polysulfide obtained via inverse vulcanization as a novel controlled-release fertilizer matrix in a system containing either Bayovar rock (Bay) or struvite (Str). The polysul ́ fide provides S for plants after being biologically oxidized to sulfate in soil, generating local acidity for P solubilization. After 15 days of soil incubation, the composites with 75 wt % Str and 75 wt % Bay achieved, respectively, 3 and 2 times the S oxidation from the elemental sulfur reference. Results indicated that P content stimulates the soil microorganismsʼ activity for S oxidation. The matrix had a physical role in improving Bay dissolution and regulating the rapid release from Str. Moreover, the available P in soil was 25−30 mg/dm3 for Bay composites, while for pure Bay, it was 9 mg/dm3 .  aFertilizer  aInverse vulcanization  aPolysulfide  aStruvite1 aGIROTO, A. S.1 aREIS, H. P. G.1 aGUIMARÃES, G. G. F.1 aRIBEIRO, C.  tJournal of Agricultural and Food Chemistrygv. 69, 2021.