Effect of Nitrogen and Sulfur Fertilization on Accumulation Characteristics and Physicochemical Properties of A- and B-Wheat Starch

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• 作者：Wenhao Li ; Yulin Shan ; Xinlong Xiao ; Jianmei Zheng ; Qingui Luo ; Shaohui Ouyang ; Guoquan Zhang
• 刊名：Journal of Agricultural and Food Chemistry
• 出版年：2013
• 出版时间：March 13, 2013
• 年：2013
• 卷：61
• 期：10
• 页码：2418-2425
• 全文大小：497K
• 年卷期：v.61,no.10(March 13, 2013)
• ISSN：1520-5118

文摘

The effects of nitrogen (N) fertilization at the rates of 0 and 230 kg hm^鈥? combined with selected sulfur (S) fertilization rates of 0, 46, 56, 77, and 115 kg hm^鈥? on A- and B-wheat starch granule accumulation, composition, and thermal and pasting properties were investigated. Scanning electron micrographs revealed that A- and B-starch granules accumulation during grain filling can be influenced significantly by N and S fertilization, and B-granules tend to be more sensitive to S fertilization than A-starch granules. The doses of nitrogen and sulfur fertilization on starch properties were not positively correlated; higher concentration of fertilizers failed to cause a higher effects. N₂₃₀S₄₆ and N₂₃₀S₅₆ treatment resulted in the higher peak viscosity, trough viscosity, breakdown viscosity, final and setback viscosity, and gelatinization temperature (T_o, T_p, T_c) according to differential scanning calorimeter (DSC) and rapid visco analyzer (RVA), respectively.

Keywords:

starch; fertilizer; pasting; thermal; grain filling