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Long-term increased grain yield and soil fertility from intercropping

文献类型： 外文期刊

作者： Li, Xiao-Fei 1 ; Wang, Zhi-Gang 1 ; Bao, Xing-Guo 4 ; Sun, Jian-Hao 4 ; Yang, Si-Cun 4 ; Wang, Ping 5 ; Wang, Cheng-Bao 4 ; Wu, Jin-Pu 1 ; Liu, Xin-Ru 1 ; Tian, Xiu-Li 1 ; Wang, Yu 1 ; Li, Jian-Peng 1 ; Wang, Yan 1 ; Xia, Hai-Yong 2 ; Mei, Pei-Pei 3 ; Wang, Xiao-Feng 1 ; Zhao, Jian-Hua 4 ; Yu, Rui-Peng 1 ; Zhang, Wei-Ping 1 ; Che, Zong-Xian 4 ; Gui, Lin-Guo 5 ; Callaway, Ragan M. 6 ; Tilman, David 7 ; Li, Long 1 ;

作者机构： 1.China Agr Univ, Coll Resources & Environm Sci, Key Lab Plant & Soil Interact, Beijing Key Lab Biodivers & Organ Farming,Minist, Beijing, Peoples R China

2.Shandong Acad Agr Sci, Crop Res Inst, Jinan, Peoples R China

3.Henan Inst Sci & Technol, Coll Life Sci & Technol, Xinxiang, Henan, Peoples R China

4.Gansu Acad Agr Sci, Inst Soils Fertilizers & Water Saving Agr, Lanzhou, Peoples R China

5.Ningxia Acad Agr & Forestry Sci, Inst Crop Sci, Yinchuan, Ningxia, Peoples R China

6.Univ Montana, Inst Ecosyst, Missoula, MT 59812 USA

7.Univ Calif Santa Barbara, Bren Sch Environm Sci & Management, Santa Barbara, CA 93106 USA

期刊名称：NATURE SUSTAINABILITY （ 影响因子：19.346； 五年影响因子：19.346 ）

ISSN： 2398-9629

年卷期： 2021 年 4 卷 11 期

页码：

收录情况： SCI

摘要： Growing demand for food is confronting constraints to its sustainable production. This study finds that intercropping increases grain yields and their stability and that yield benefits increase over time. Population and income growth are increasing global food demand at a time when a third of the world's agricultural soils are degraded and climate variability threatens the sustainability of food production. Intercropping, the practice of growing two or more spatially intermingled crops, often increases yields, but whether such yield increases, their stability and soil fertility can be sustained over time remains unclear. Using four long-term (10-16 years) experiments on soils of differing fertility, we found that grain yields in intercropped systems were on average 22% greater than in matched monocultures and had greater year-to-year stability. Moreover, relative to monocultures, yield benefits of intercropping increased through time, suggesting that intercropping may increase soil fertility via observed increases in soil organic matter, total nitrogen and macro-aggregates when comparing intercropped with monoculture soils. Our results suggest that wider adoption of intercropping could increase both crop production and its long-term sustainability.

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