Analysis of synthesis, accumulation and physicochemical properties of Tartary buckwheat starches affected by nitrogen fertilizer

Licheng Gao; Meijuan Xia; Chenxi Wan; Yanheng Jia; Liming Yang; Meng Wang; Pengke Wang; Qinghua Yang; Pu Yang; Xiaoli Gao; Jinfeng Gao

doi:10.1016/j.carbpol.2021.118570

Analysis of synthesis, accumulation and physicochemical properties of Tartary buckwheat starches affected by nitrogen fertilizer

Carbohydr Polym. 2021 Dec 1:273:118570. doi: 10.1016/j.carbpol.2021.118570. Epub 2021 Aug 18.

Authors

Affiliations

¹ State Key Laboratory of Crop Stress Biology for Arid Areas, College of Agronomy, Northwest A&F University, Yangling, Shaanxi Province 712100, China.
² Yulin Institute of Agricultural Sciences, Yulin, Shaanxi Province 719000, China.
³ State Key Laboratory of Crop Stress Biology for Arid Areas, College of Agronomy, Northwest A&F University, Yangling, Shaanxi Province 712100, China. Electronic address: gaojf7604@126.com.

PMID: 34560981
DOI: 10.1016/j.carbpol.2021.118570

Abstract

Nitrogen fertilizer is a crucial factor affecting the growth and grain quality of Tartary buckwheat. This study was to investigate the synthesis, accumulation, and physicochemical properties of Tartary buckwheat starches under four nitrogen levels (0, 90, 180, 270 kg N ha^-1). The results showed that activities of four key enzymes, starch contents all first increased and then decreased with increasing nitrogen levels, and peaked at 180 kg N ha^-1. All the starches showed typical A-type, while higher nitrogen levels significantly increased the relative crystallinity. The viscosities significantly decreased, onset, peak, and conclusion first decreased and then increased, while pasting temperature and gelatinization enthalpy increased with increasing nitrogen levels. Nitrogen fertilizer and year had significant effects on the synthesis, accumulation and physicochemical properties of Tartary buckwheat starch, and the nitrogen level of 180 kg N ha^-1 was more suitable for planting in the northern area of the Loess Plateau.

Keywords: Nitrogen fertilizer; Physicochemical properties; Starch synthesis; Tartary buckwheat.