Effects of cultivation optimization on root characteristics and starch properties of rice at grain filling stage in the lower reaches of the Yangtze River
Year: 2024
Type: article
Abstract: In order to investigate the relationship between root characteristics and starch properties of rice at grain filling stage in the lower reaches of the Yangtze River under different integrative cultivation practices techniques, field experiments were carried out with Yongyou 2640, Wuyunjing 24, Yangdao 6, and Jinxiangyu 1 as the experimental materials. Five cultivation techniques were set up, including nitrogen blank area (0N), local farmers’ practice (control), densification and nitrogen reduction, alternate wetting and drying irrigation and increasing application of rapeseed cake fertilizer. The results showed that compared with the local farmers’ practice (control), the yield of Yongyou 2640 under the treatment of densification and nitrogen reduction, alternate wetting and drying irrigation and increasing application of rapeseed cake fertilizer increased by 6.49%, 11.06%, and 12.72%, respectively. The yield of Wuyunjing 24 increased by 1.92%, 11.10%, and 17.05%, respectively. The yield of Yangdao 6 increased by 9.30%, 18.50%, and 22.89%, respectively, and the yield of Jinxiangyu1 increased by 6.92%, 14.72%, and 17.89%, respectively. At the same time, we also observed that with the integration and optimization of cultivation practices, root morphological and physiological characteristics (root dry weight, root length, root diameter, root oxidation activity, root bleeding intensity, zeatin and zeatin riboside contents in root and root bleeding sap and total organic acid content in exudates), the activity of key enzymes for starch synthesis in grains (soluble starch synthase, granule-bound starch synthase), peak viscosity, hot viscosity, breakdown, final viscosity, solubility and swelling degree gradually increased. Correlation analysis showed that the morphological and physiological characteristics of roots at grain filling stage were closely related to grain yield and starch properties. It indicated that the integration and optimization of cultivation practices might improve rice quality through regulating the growth of underground roots, and finally achieve the goals of high yield, good quality and high efficiency.
Source: ACTA AGRONOMICA SINICA
Authors: Hao WU, Ying ZHANG, Chen WANG, Han-Zhu GU, Tian-Yang ZHOU, Wei-Yang ZHANG, Jun-Fei GU, Li-Jun LIU, Jian-Chang YANG, Hao ZHANG
Institution: Yangzhou University
Language: English
Subfield: Plant Science
Domain: Life Sciences
SDG: Zero hunger
Open Access status: gold
Estimated APC paid: $941
OpenAlex ID: W4408920433