Suitable stocking density of fish in paddy field contributes positively to 2-acetyl-1-pyrroline synthesis in grain and improves rice quality
文献类型： 外文期刊
作者： Wang, Qi 1 ; Li, Mei-juan 1 ; Zhang, Jia-en 1 ; Liu, Zi-qiang 1 ; Yang, Kai 1 ; Li, Hong-ru 1 ; Luo, Ming-zhu 1 ;
作者机构： 1.South China Agr Univ, Guangdong Prov Key Lab Ecocircular Agr, Guangzhou 510642, Peoples R China
2.South China Agr Univ, Coll Agr, Guangzhou, Peoples R China
3.South China Agr Univ, Guangdong Engn Technol Res Ctr Modern Ecoagr & Cir, Guangzhou, Peoples R China
4.South China Agr Univ, Coll Nat Resources & Environm, Dept Ecol, Guangzhou, Peoples R China
5.Guangdong Acad Agr Sci, Rice Res Inst, Guangzhou, Peoples R China
6.South China Agr Univ, Guangdong Lab Lingnan Modern Agr, Guangzhou, Peoples R China
7.South China Agr Univ, Key Lab Agroenvironm Trop, Minist Agr & Rural Affairs, Guangzhou, Peoples R China
关键词： fragrant rice; rice-fish co-culture; 2-acetyl-1-pyrroline; rice quality; yield; plant nutrients
期刊名称：JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE （ 影响因子：4.1； 五年影响因子：4.2 ）
ISSN： 0022-5142
年卷期： 2023 年 103 卷 10 期
页码：
收录情况： SCI
摘要： BACKGROUNDFragrant rice is increasingly popular with the public owing to its fresh aroma, and 2-acetyl-1-pyrroline (2-AP) is the main characteristic component of the aroma in fragrant rice. Rice-fish co-culture is an environmentally friendly practice in sustainable agriculture. However, the effect of rice-fish co-culture on 2-AP in grains has received little study. A conventional fragrant rice (Meixiangzhan 2) was used, and a related field experiment during three rice growing seasons was conducted to investigate the effects of rice-fish co-culture on 2-AP, as well as the rice quality, yield, plant nutrients, and precursors and enzyme activities of 2-AP biosynthesis in leaves. This study involved three fish stocking density treatments (i.e. 9000 (D1), 15 000 (D2), and 21 000 (D3) fish fries per hectare) and rice monocropping. RESULTSRice-fish co-culture increased the 2-AP content in grains by 2.5-49.4% over that of the monocropping, with significant increases in the early and late rice seasons of 2020. Rice-fish co-culture treatments significantly promoted seed-setting rates by 3.39-7.65%, and improved leaf nutrients and rice quality. Notably, the D2 treatment significantly increased leaf total nitrogen (TN), total phosphorus (TP), and total potassium (TK) contents and the head rice rate at maturity stage, while significantly decreased chalkiness degree. There was no significant difference in rice yield. CONCLUSIONRice-fish co-culture had positive effects on 2-AP synthesis, rice quality, seed-setting rates, and plant nutrient contents. The better stocking density of field fish for rice-fish co-culture in this study was 15 000 fish ha(-1). (c) 2023 Society of Chemical Industry.
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