Guangdong Provincial Key Laboratory of Eco-Circular Agriculture, South China Agricultural University, Guangzhou, P. R. China.
Key Laboratory of Agro-Environment in the Tropics, Ministry of Agriculture and Rural Affairs, College of Natural Resources and Environment, South China Agricultural University, Guangzhou, P. R. China.
J Sci Food Agric. 2021 Nov;101(14):5907-5917. doi: 10.1002/jsfa.11243. Epub 2021 Apr 29.
Intercropping, which is growing two or more different crops in the same field simultaneously, is an effective traditional agricultural practice for productivity, resource utilization, and pest control. However, study on intercropping in paddy fields is limited. So in this study, field experiments of 2 years/four seasons (early and late seasons in 2016 and 2017) were conducted to examine the effects of rice-Pontederia cordata intercropping on rice plant growth, pest control, yield, income, and grain quality.
We found rice-P. cordata intercropping significantly decreased the occurrence of rice diseases and pests, with a 22.0-45.9% reduction in sheath blight and a 33.8-34.4% reduction in leaf folders. The mean land equivalent ratio (LER) (1.09) result indicates that intercropping rice and P. cordata generated positive yield effects. In addition, due to the economic profit from the replacement stripe of P. cordata in the rice paddy field, intercropping rice with P. cordata could greatly enhance farmer income. The average total income of rice intercropped with P. cordata was 2.5-fold higher than that of rice monoculture. Furthermore, intercropping significantly improved grain quality compared with the rice monoculture. It significantly increased the milled rice rate and whole milled rice rate by 11.2% and 12.8%, respectively, but decreased the chalky rice rate by 30.9-39.8% and chalkiness degree by 32.2%.
We suggest that rice-P. cordata intercropping provides an environmentally effective way to control rice diseases and pests, results in higher overall productivity and total income, and improves grain quality. © 2021 Society of Chemical Industry.
间作是指在同一块田地同时种植两种或两种以上不同作物的有效传统农业实践，可提高生产力、资源利用率和病虫害防治效果。然而，稻田间作的研究有限。因此，本研究通过 2 年/4 季（2016 年和 2017 年早季和晚季）田间试验，研究了水稻-香蒲间作对水稻生长、病虫害防治、产量、收入和稻谷品质的影响。
我们发现，水稻-香蒲间作显著降低了水稻病害和虫害的发生，纹枯病和稻纵卷叶螟的发生率分别降低了 22.0-45.9%和 33.8-34.4%。平均土地当量比（LER）（1.09）结果表明，间作水稻和香蒲产生了积极的产量效应。此外，由于香蒲在稻田中的替代条带带来了经济效益，水稻-香蒲间作可以大大提高农民的收入。与水稻单作相比，间作水稻的平均总收入高出 2.5 倍。此外，与水稻单作相比，间作显著改善了稻谷品质。间作分别使精米率和整精米率提高了 11.2%和 12.8%，但使垩白米率降低了 30.9-39.8%，垩白度降低了 32.2%。
我们建议，水稻-香蒲间作是一种控制水稻病虫害的有效环保方法，可提高整体生产力和总收入，改善稻谷品质。 © 2021 化学工业协会。
