Biochar and biofertilizer reduced nitrogen input and increased soybean yield in the maize soybean relay strip intercropping system

BMC Plant Biology

Research

Taiwen Yong¹  Xiaoting Yuan¹  Benchuan Zheng¹  Ping Chen¹  Shanshan Liu¹  Qing Du¹  Kai Luo¹  Zhidan Fu¹  Xiaochun Wang¹  Wenyu Yang¹  Chen Xie¹ 

[1] College of Agronomy, Sichuan Agricultural University, 611130, Chengdu, China;Sichuan Engineering Research Center for Crop Strip Intercropping System / Key Laboratory of Crop Ecophysiology and Farming System in Southwest, Ministry of Agriculture, 611130, Chengdu, China;

关键词: Biochar (BC);    Biofertilizer (BF);    Nitrogen fixation;    Soil properties;    Soybean yield;    Maize soybean relay strip intercropping;   

DOI  :  10.1186/s12870-023-04058-5

 received in 2022-09-26, accepted in 2023-01-12,  发布年份 2023

来源: Springer

【 摘 要 】

Applying Biochar (BC) or biofertilizers (BF) are potential approaches to reduce the nitrogen input and mitigate soil degradation in the maize soybean relay strip intercropping system (IS). In 2019 and 2020, a two-factor experiment was carried out to examine the effects of BC and BF on soil productivity and yield production in IS. 4 N input levels (8.4, 22.5, 45 kg, and 67.5 kg ha − 1) referred to as N0, N1, N2, and N3 were paired with various organic treatments, including BC (150 kg ha − 1), BF (300 kg ha − 1), and without organic amendments (CK). The results demonstrated that, despite BF decreasing the biomass and N distribution into grains, BF performed better on improved soybean yield (5.2–8.5%) by increasing the accumulation of soybean biomass (7.2 ~ 11.6%) and N (7.7%). Even though BC and BF have a detrimental effect on soybean nitrogen fixation by reducing nodule number and weight, the values of soybean nitrogenase activity and nitrogen fixation potential in BF were higher than those in BC. Additionally, BF performs better at boosting the soil’s nitrogen content and nitrate reductase and urease activity. BF increased the concentration of total N, soil organic matter, Olsen-phosphorus, and alkaline hydrolyzable N in the soil by 13.0, 17.1, 22.0, and 7.4%, respectively, compared to CK. Above all, applying BF combination with N2 (45 kg ha − 1 N) is a feasible strategy to raise crop grain output and keep soil productivity over the long term in IS.

【 授权许可】

CC BY   
© The Author(s) 2023

【 图 表 】

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Fig. 5

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