Controlled-Release Fertilizer Improves Rice Matter Accumulation Characteristics and Yield in Rice–Crayfish Coculture

In recent years, rice–fish coculture has gained more popularity at a growing pace in China. Controlled-release fertilizer can provide nutrients in a timely manner and increase nutrient efficiency. A 2-year field experiment, which adopted both conventional japonica and two indica hybrid rice varietie...

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Bibliographic Details
Published in:Agriculture (Basel) 2022-10, Vol.12 (10), p.1674
Main Authors: Wang, Qiangsheng, Yu, Kunlong, Zhang, Hui
Format: Article
Language:English
Subjects:
Accumulation
Agricultural production
Agronomy
Compound fertilizers
Controlled release
controlled-release fertilizer
Crayfish
Crop growth
different rice varieties
Dry matter
dry matter accumulation
Efficiency
Elongation
Experiments
Farming
Fertilizers
Growth rate
Inorganic compounds
Irrigation
Leaf area
Leaf area index
Nutrient release
Nutrients
Productivity
Rice
rice growth characteristics parameters
rice–crayfish coculture
yield
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Summary:In recent years, rice–fish coculture has gained more popularity at a growing pace in China. Controlled-release fertilizer can provide nutrients in a timely manner and increase nutrient efficiency. A 2-year field experiment, which adopted both conventional japonica and two indica hybrid rice varieties, was performed to evaluate the effects of controlled-release fertilizer and inorganic compound fertilizer on rice matter accumulation and yield in rice–crayfish coculture and conventional rice farming. The results showed that compared to conventional rice farming, rice–crayfish coculture decreased dry matter accumulation at mature stage and yield by 4.02–8.15% and 4.13–9.34%, respectively. This was mainly due to a decrease in the crop growth rate, net assimilation rate, leaf area index, and light accumulation duration before elongation stage. Compared to inorganic compound fertilizer, controlled-release fertilizer increased dry matter accumulation at the mature stage and yield by 5.02–6.95% and 3.29–6.21%, respectively. Compared to conventional rice farming, rice–crayfish coculture decreased N partial factor productivity and N agronomic use efficiency by 4.13–9.34% and 3.96–8.98%, respectively. Compared to inorganic compound fertilizer, controlled-release fertilizer increased those by 3.29–6.15% and 7.36–14.01%. There was a positive linear correlation between the N partial factor productivity, N agronomic use efficiency, and yield.
ISSN:2077-0472
2077-0472
DOI:10.3390/agriculture12101674