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Rice intercropping with water mimosa (Neptunia oleracea Lour.) can facilitate soil N utilization and alleviate apparent N loss

文献类型： 外文期刊

作者： Hei, Zewen 1 ; Xiang, Huimin 1 ; Zhang, Jiaen 1 ; Liang, Kaiming 3 ; Zhong, Jiawen 1 ; Li, Meijuan 2 ; Lu, Yuqing 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, Key Lab Agroenvironm Trop, Minist Agr & Rural Affairs, Guangzhou 510642, Peoples R China

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

关键词： Rice; Intercropping; Apparent N balance; Soil N nutrient; N loss

期刊名称：AGRICULTURE ECOSYSTEMS & ENVIRONMENT （ 影响因子：4.241； 五年影响因子：4.825 ）

ISSN： 0167-8809

年卷期： 2021 年 313 卷

页码：

收录情况： SCI

摘要： Legume/non-legume intercropping is a widely applied agricultural practice worldwide and is very important for the development of sustainable agriculture, especially for improving soil nitrogen (N) nutrients and reducing N application via biological N fixation by legumes. However, research on intercropping between rice and aquatic legumes has rarely been undertaken. To address this issue, a field experiment was conducted to investigate the apparent N balance in rice and water mimosa (Neptunia oleracea Lour.) intercropping systems. Planting pattern treatments, including rice monocropping and rice/water mimosa intercropping, were employed in the paddy field, and three N fertilizer application levels, 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), were applied for the two planting patterns. The results showed that compared with rice monocropping, the growth indicators of rice were higher in the rice/water mimosa intercropping system. N fertilizer facilitated rice growth, and water mimosa grew better but reduced the partial factor productivity of rice. Notably, the biological N fixation efficiency of water mimosa was the highest in the reduced N treatment. In addition, the soil N nutrients in the rice/water mimosa intercropping treatments were higher than those in the rice monocropping treatments. In contrast, apparent N loss in the monocropping treatments was higher than that in the intercropping treatments, and it also increased with more N fertilizer applied. Thus, intercropping with water mimosa could promote rice growth, enhance N input, improve soil N nutrients, and reduce N loss. Furthermore, based on the performance of rice monocropping treatment under the conventional N level and rice/water mimosa intercropping treatment under the reduced N level on crop growth, N fixation, soil N nutrients, N mineralization and loss, we suggest thatrice/water mimosa intercropping with a reduced N application level is a much better choice. Taken together, rice/water mimosa intercropping is an environmentally friendly practice that could decrease N fertilizer application, and may alleviate nonpoint source pollution in paddy fields.

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