Study on the effect of embedded raceway aquaculture for Micropterus salmoides in rice fields

doi:10.16178/j.issn.0528-9017.20240477

Abstract

Abstract:

To analyze the aquaculture effect of embedded raceway aquaculture for Micropterus salmoides in rice fields and evaluate its ecological and economic benefits, two aquaculture models (LK group and XK group) were constructed in this study in Wuxing District, Huzhou City. By monitoring the growth and water quality of Micropterus salmoides during the breeding process, as well as changes in paddy soil before and after cultivation, and evaluating yield and economic benefits, a suitable aquaculture model was constructed. The results showed that the growth rate of Micropterus salmoides in the LK group was slower than that in the XK group, but there was no significant difference in harvest specifications. The total nitrogen, total phosphorus, and COD levels in the water within the LK and XK group raceways were higher than those in the surrounding ditch. After cultivation, the total nitrogen content in the LK group paddy soil decreased from (1.60±0.15)g·kg^-1 to (1.12±0.05)g·kg^-1, and the total phosphorus content decreased from (0.54±0.05)g·kg^-1 to (0.11±0.02)g·kg^-1; The total nitrogen content of paddy soil in the XK group decreased from (1.52±0.13)g·kg^-1 to (1.05±0.06)g·kg^-1, and the total phosphorus content decreased from (0.47±0.03)g·kg^-1 to (0.06±0.02)g·kg^-1. However, the total amount of humus and fertility both increased. The LK group reduced fertilizer by 37.5%-53.1%, while the XK group reduced fertilizer by 50.1%-62.5%. Both groups did not use pesticides. The profit of the LK group was 5 680.9 yuan per 667 m², significantly lower than the XK group (7 902.6 yuan per 667 m²). Therefore, Micropterus salmoides rice field embedded raceway aquaculture is a high-quality rice fishing model that integrates economy and ecology. The suitable mode is to release 10 000 to 15 000 Micropterus salmoides species in mid to late April, and sow the late rice variety Yongyou 1540 in early June. The optimal area ratio is at least 6 667.0 m² of rice paddies on a single raceway.

Key words: Micropterus salmoides, rice fishing and breeding, embedded raceway, culture effect

CLC Number:

S962.35

ZHOU Dan, ZHANG Jinpeng, LIU Mei, HU Dayan, YUAN Julin, ZHOU Zhijin. Study on the effect of embedded raceway aquaculture for Micropterus salmoides in rice fields[J]. Journal of Zhejiang Agricultural Sciences, 2025, 66(2): 475-482.

Figures/Tables 10

References 25

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组别	阶段	胡敏酸含量/(g·kg^-1)	富啡酸含量/(g·kg^-1)	胡敏素含量/(g·kg^-1)	总含量/(g·kg^-1)
LK	种植前	3.17±0.59	4.92±0.21	6.35±1.01	14.43±0.21
	种植后	6.67±0.54	1.15±0.01	16.61±1.59	24.43±1.05
XK	种植前	1.72±0.29	2.75±0.24	6.72±0.37	11.19±0.17
	种植后	5.53±0.39	0.51±0.66	12.32±1.61	18.36±2.67

组别	阶段	胡敏酸含量/(g·kg^-1)	富啡酸含量/(g·kg^-1)	胡敏素含量/(g·kg^-1)	总含量/(g·kg^-1)
LK	种植前	3.17±0.59	4.92±0.21	6.35±1.01	14.43±0.21
	种植后	6.67±0.54	1.15±0.01	16.61±1.59	24.43±1.05
XK	种植前	1.72±0.29	2.75±0.24	6.72±0.37	11.19±0.17
	种植后	5.53±0.39	0.51±0.66	12.32±1.61	18.36±2.67

组别	品种	每667 m²有效穗/万	每穗粒数	结实率/%	千粒重/g	每667 m²产量/kg
LK	南粳46	22.78	112.72	91.71	25.47	599.80
XK	甬优1540	10.52	375.83	93.92	22.29	827.70

组别	品种	每667 m²有效穗/万	每穗粒数	结实率/%	千粒重/g	每667 m²产量/kg
LK	南粳46	22.78	112.72	91.71	25.47	599.80
XK	甬优1540	10.52	375.83	93.92	22.29	827.70

组别	每667 m² 大米产量/kg	每667 m² 大口黑鲈产量/kg	每667 m² 米糠产量/kg
LK	389.87	106.10	119.96
XK	538.00	142.10	165.54