Journal
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
Volume 65, Issue 6, Pages 1116-1123Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jafc.6b05149
Keywords
selenium fertilizers; wheat; maize; biofortification; residual effect
Funding
- Special Fund for Agro-scientific Research in the Public Interest of China [201303106]
- National Natural Science Foundation of China [41471271]
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Foliar Se fertilizers were applied to investigate the effects of Se forms on Se accumulation and distribution in the wheat-maize rotation system and residual concentration of Se in subsequent crops. Sodium selenite, sodium selenate, selenomethionine, chemical nano-Se, humic acid + sodium selenite, and compound fertilizer + sodium selenite were applied once at the flowering stage of wheat (30 g ha(-1)) and at the bell stage of maize (60 g h(-1)). Compared with the control treatment, foliar Se applications significant increased the grain Se concentration of wheat and maize by 0.02-0.31 and 0.07-1.09 mg kg(-1), respectively. Wheat and maize grain Se recoveries were 3.0-10.4 and 4.1-18.5%, respectively. However, Se concentrations in the grain of subsequent wheat and maize significantly decreased by 77.9 and 91.2%, respectively. The change of Se concentration in soil was a dynamic process with Se depletion after harvest of maize.
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