期刊
JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE
卷 100, 期 1, 页码 277-286出版社
WILEY
DOI: 10.1002/jsfa.10035
关键词
mixed-cropping; rice-duck co-culture; biodiversity; soil nutrients; grain yield
资金
- Science and Technology Project of Guangzhou [201604020062]
- Science and Technology Project of Guangdong Province [2015B090903077, 2016A020210094, 2017A090905030]
- Innovation Team Construction Project of the Modern Agricultural Industry Technology System of Guangdong Province [2017LM1100, 2018LM1100, 2019KJ105]
- Guangdong Provincial Key Laboratory of Eco-Circular Agriculture [2019B030301007]
- Overseas Joint Doctoral Training Program of the South China Agricultural University [2018LHPY010]
BACKGROUND Biodiversity-based agricultural systems can improve production efficiency and sustainability, with fewer negative environmental impacts and lower use of external inputs. Mixed-cropping and rice-duck co-culture have been shown to produce ecological benefits and to have positive effects on paddy soil. However, the effects of a combination of mixed cropping with different rice cultivars and duck co-culture on soil nutrients availability and grain yields have not been evaluated. A paddy field experiment was carried out over two rice growing seasons to test these effects. RESULTS Several combinations of rice cultivars, when integrated with duck co-culture, significantly increased the soil organic matter and total nitrogen contents during the rice growing seasons, as compared to mono-cropping systems. In mixed-cropping combined with duck co-culture (MCDC) systems, the soil alkali-hydrolyzable nitrogen content ranged from 4.33% to 17.86% higher than that in mono-cropping systems. Similar increases were found for soil available phosphorus (8.71-15.91%) and soil available potassium (8.65-39.43%) contents. Furthermore, MCDC produced higher grain yields and harvest indexes for both study seasons. CONCLUSION The integration of MCDC systems had positive effects on soil nutrient contents of paddy fields, which could, in turn, lead to yield enhancements, as well as additional income for farmers in the form of organic duck meat. (c) 2019 Society of Chemical Industry
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