期刊
FIELD CROPS RESEARCH
卷 208, 期 -, 页码 34-43出版社
ELSEVIER
DOI: 10.1016/j.fcr.2017.04.005
关键词
Rice; Intercropping; Land equivalent ratio; Silicon; Plant resistance
类别
资金
- National Science and Technology Support Program of China [2012BAD14B00]
- National Key Basic Research and Development Program of China [2011CB100400]
Intercropping is an effective agricultural practice for crop production, resource utilization, and pest control. However, aquatic crops (e.g., rice) intercropping is relatively rare. Field experiments of two years/four seasons (early and late seasons in 2012, 2013) was carried out to test the effects of rice-water spinach intercropping on yield, disease and pest control, and Si, N nutrition of rice plant in the present study. The experiment contained three treatments including rice monoculture, water spinach monoculture and rice-water spinach intercropping with three replicates by randomized block design. Results showed that rice-water spinach intercropping significantly reduced the incidence of disease and pest of rice, with a reduction of rice sheath blight by 17.3%-50.6% and rice leaf folders by 5.1%-58.2%. For yield, intercropping resulted in an increase of rice yield by 45.1%-71.7% in early season and 20.9%-34.3% in late season, but a decrease of water spinach yield by 14.1%-37.1% in early season and 3.8%-18.3% in late season. However, rice-water spinach intercropping gave a higher land equivalent ratio (1.02-1.17) therefore improved land utilization efficiency. Furthermore, intercropping significantly increased Si concentration, Si and N absorption in rice leaves in ripening stage compared with rice monoculture. Our findings suggest that rice-water spinach intercropping exhibits yield advantage for rice or total yield, improves Si nutrition of rice and provides an environmentally sound approach in controlling disease and pest.
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