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Intercropping of Rice and Water Mimosa (Neptunia oleracea Lour.): A Novel Model to Control Pests and Diseases and Improve Yield and Grain Quality while Reducing N Fertilizer Application

文献类型： 外文期刊

作者： Hei, Zewen 1 ; Xiang, Huimin 1 ; Zhang, Jiaen 1 ; Liang, Kaiming 5 ; Zhong, Jiawen 1 ; Li, Meijuan 1 ; Ren, Xiaoqiao 1 ;

作者机构： 1.South China Agr Univ, Guangdong Prov Key Lab Ecocircular Agr, Guangzhou 510642, Peoples R China

2.South China Agr Univ, Coll Nat Resources & Environm, Dept Ecol, Guangzhou 510642, Peoples R China

3.Guangdong Prov Engn Technol Res Ctr Modern Ecoagr, Guangzhou 510642, Peoples R China

4.South China Agr Univ, Minist Agr & Rural Affairs, Key Lab Agroenvironm Trop, Guangzhou 510642, Peoples R China

5.Guangdong Acad Agr Sci, Rice Res Inst, Guangdong Key Lab New Technol Rice Breeding, Guangzhou 510640, Peoples R China

关键词： rice; intercropping; water mimosa; pest and disease; microclimate; grain quality; yield

期刊名称：AGRICULTURE-BASEL （ 影响因子：3.408； 五年影响因子：3.459 ）

ISSN：

年卷期： 2022 年 12 卷 1 期

页码：

收录情况： SCI

摘要： Cereal/legume intercropping is an effective agricultural practice for pest and disease control and crop production. However, global research on rice and aquatic legume intercropping is relatively rare. A field experiment during two seasons (2018 late season and 2019 early season) was conducted to explore the effects of rice and water mimosa intercropping on rice canopy microclimate, pest and disease, yield, grain quality, and economic income. Two cultivation patterns including rice/water mimosa intercropping and rice monocropping were employed, and three nitrogen (N) fertilizer application levels, including zero N (ZN, 0 kg ha(-1) N), reduced N (RN, 140 kg ha(-1) N), and conventional N (CN, 180 kg ha(-1) N) levels, were applied for the above two cultivation patterns. The results showed that rice/water mimosa intercropping formed a canopy microclimate of rice with higher temperature and lower relative humidity and dew point temperature. In addition, there was a significant reduction in the occurrences of rice leaf blast by 15.05%~35.49%, leaf folders by 25.32%~43.40%, and sheath blight by 16.35%~41.91% in the intercropping treatments. Moreover, rice/water mimosa intercropping increased rice per unit yield by 43.00%~53.10% in the late season of 2018 and 21.40%~26.18% in the early season of 2019. Furthermore, rice grain quality was totally improved, among which brown and head rice rates increased but rice chalky rate and chalkiness degree decreased in the intercropping system. We suggest that combining rice/water mimosa intercropping and N fertilizer reduction can be used as an environmentally friendly eco-farming technique because it can decrease N fertilizer application by approximately 40 kg center dot ha(-1). This combination would not only mitigate nonpoint source pollution but also obtain advantages for controlling rice pests and diseases that would alleviate pesticide usage and improve rice yield and grain quality, which can be extended for green rice production to increase income for producers.

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