Effects of Gypsum Application Rate on Yield and Quality of Rice in Coastal Saline-alkali Soils
Received date: 2023-07-31
Online published: 2023-09-15
Gypsum can be used to improve saline-alkali soil fertilizer and promote rice production, but its effect on rice quality remains unclear. Nanjing 9108, a conventional rice variety widely used in Jiangsu Province, was used as experimental material to investigate the effects of gypsum application at four levels (0 t/hm2, 3 t/hm2, 6 t/hm2 and 12 t/hm2) on yield and quality of rice in coastal saline-alkali soils with salt content of about 0.3%. The results showed that compared to not applying gypsum, applying gypsum significantly increased the effective panicle number and grain number per panicle, thereby increasing the yield(11.8%~30.6%), the yield increased with the increase of gypsum application rate. In the aspect of processing quality, applying gyspum significantly increased the milled rice rate (1.5%~2.7%) and the head rice rate (2.2%~5.8%), but had no sinnificant effect on the brown rice rate. In the aspect of appearance quality, applying gypsum significantly reduced chalkiness degree (-24.0%~-16.2%) and chalkiness percentage (-43.1%~-32.6%), but had no significant effect on length/width ratio. In terms of cooking and eating characteristics, applying gypsum significantly increased gel consistency (7.6%~26.2%) and decreased amylose content (-19.4%~-3.6%), but had no significant effect on protein content. The taste value (6.1%~15.4%) of rice increased significantly with the increase of gypsum application rate. In addition, applying gypsum significantly improved the gelatinization characteristics of rice. The collapse value increased with the increase of the amount of gypsum applied, while the reduction value decreased with the increase of applying gypsum applied. In conclusion, applying gypsum can simultaneously improve rice yield and quality in coastal saline-alkali soils, and the improvement effect increased with the increase of gypsum application rate.
Key words： rice; gypsum; yield; rice quality; coastal saline-alkali soils
CHEN Yuqiong, MENG Yi, XU Zhiheng, DU Hanmeng, DAI Qigen, ZHANG Hongcheng, LIAO Ping . Effects of Gypsum Application Rate on Yield and Quality of Rice in Coastal Saline-alkali Soils[J]. China Rice, 2023 , 29(5) : 89 -92 . DOI: 10.3969/j.issn.1006-8082.2023.05.016
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