Jiangsu Key Laboratory of Crop Genetics and Physiology & Jiangsu Key Laboratory of Crop Cultivation and Physiology & Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops & Research Institute of Rice Industrial Engineering Technology, Yangzhou University, Yangzhou, China.
Ministry of Education, Key Laboratory of Crop Physiology, Ecology and Genetic Breeding, Jiangxi Agricultural University, Nanchang, China.
J Sci Food Agric. 2023 Sep;103(12):5747-5753. doi: 10.1002/jsfa.12647. Epub 2023 May 5.
Biochar can play a key role in improving paddy soil and productivity. However, there is limited information on the effects of biochar on rice quality and starch gelatinization. In this study, four rice straw biochar dosage treatments (0, 20, 40 and 60 g kg ; CK, C20, C40 and C60, respectively) were set up to investigate rice yield components, rice processing, appearance and cooking quality, and starch gelatinization.
Addition of biochar increased the effective panicle, grain number per panicle and seed setting rate. However, it decreased the 1000-grain weight, resulting in an increase in yield. In 2019, all the biochar treatments improved the head rice rate (9.13-11.42%), whereas in 2020 only the C20 treatment improved. Low biochar dosage had little effect on grain appearance. High biochar dosage significantly decreased the chalky rice rate by 21.47% and chalkiness by 19.44% in 2019. However, it significantly increased the chalky rice rate and chalkiness by 118.95% and 85.45% in 2020, respectively. Biochar significantly lowered the amylose content except for the C20 and C40 treatments in 2020, and the gel consistency. The C40 and C60 treatments significantly increased the peak and breakdown viscosities and decreased the setback viscosity compared with CK. Correlation analysis showed that starch gelatinization characteristics were significantly correlated with the head rice rate, chalky rate and amylose content.
A lower biochar dosage can improve the yield and milled rice rate and maintain a higher quality of appearance, whereas a higher biochar dosage can significantly improve starch gelatinization. © 2023 Society of Chemical Industry.
生物炭可以在提高稻田生产力方面发挥关键作用。然而，关于生物炭对水稻品质和淀粉糊化的影响，信息有限。本研究设置了四个稻秸生物炭施用量处理（0、20、40 和 60 g kg-1；分别为 CK、C20、C40 和 C60），以研究水稻产量构成、稻米加工、外观和蒸煮品质以及淀粉糊化特性。
添加生物炭增加了有效穗数、穗粒数和结实率。然而，它降低了千粒重，从而提高了产量。2019 年，所有生物炭处理都提高了整精米率（9.13-11.42%），而 2020 年只有 C20 处理提高了整精米率。低生物炭用量对稻米外观影响较小。高生物炭用量在 2019 年分别显著降低了垩白米率 21.47%和垩白度 19.44%。然而，在 2020 年，它显著增加了垩白米率 118.95%和垩白度 85.45%。生物炭除 2020 年的 C20 和 C40 处理外，显著降低了直链淀粉含量，而凝胶稠度则有所降低。与 CK 相比，C40 和 C60 处理显著增加了峰值和崩解粘度，降低了回生粘度。相关分析表明，淀粉糊化特性与整精米率、垩白率和直链淀粉含量显著相关。
较低的生物炭用量可以提高产量和整精米率，保持较高的外观品质，而较高的生物炭用量可以显著改善淀粉糊化特性。© 2023 化学工业协会。
