Effects of Nitrogen Fertilizer Reduction and Rhizobia Inoculation on Physiological Growth, Nitrogen Use Efficiency and Yield of Soybean

被引：0
|
作者：
Xiang Y. [1 ,2 ]
Zhang W. [1 ,2 ]
Tang Z. [1 ,2 ]
Fu J. [1 ,2 ]
Li Z. [1 ,2 ]
Zhang F. [1 ,2 ]
机构：
[1] Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Northwest a and F University, Ministry of Education, Shaanxi, Yangling
[2] Institute of Water-saving Agriculture in Arid Areas of China, Northwest a and F University, Shaanxi, Yangling
来源：
Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery | 2024年 / 55卷 / 03期
关键词：
inoculation of rhizobium; nitrogen application; nitrogen use efficiency; soybean; yield;
D O I：
10.6041/j.issn.1000-1298.2024.03.034
中图分类号：
学科分类号：
摘要：
In agricultural production within arid and semi-arid regions, common practices involve rhizobium bacteria inoculation and nitrogen application to promote soybean growth and increase seed yields. However, there has been limited research on the interaction between rhizobium inoculation and nitrogen application and their impact on soybean growth and yield. This two-year field experiment aimed to address this gap by investigating four nitrogen application levels ( NO ; 0 kg/hm , Nl ; 60 kg/hm , N2 ; 120 kg/hm , N3 ; 180 kg/hm ) and two inoculation levels; rhizobium inoculation (R) and water mixed with no inoculation (unmarked). Various parameters related to soybean growth, including nodule number, nodule dry weight, leaf area index (LAI) , biomass accumulation and root characteristics, were measured at different growth stages. Additionally, physiological indicators such as chlorophyll content, photosynthetic parameters, fluorescence parameters and nitrogen uptake, along with nitrogen use efficiency calculations were assessed. The results demonstrated that soybean growth reached its optimum under the RN2 treatment, with maximum nodule number of 241.47, maximum nodule dry weight of 1. 30 g, maximum root length density of 15. 00 cm/cm , maximum LAI of 5.44 cm /cm , maximum biomass accumulation of 17 530.51 kg/hm , maximum chlorophyll content of 53.55, maximum net photosynthesis rate of 32. 75 |xmol/(m -s) , and maximum seed yield of 4 659. 4 kg/hm . In conclusion, reducing nitrogen fertilizer application ( N2 ) while concurrently inoculating with rhizobium ( R) was essential for enhancing the physiological growth of soybeans in the Guanzhong Plain, improving nitrogen use efficiency and increasing soybean yields. The research result can provide both theoretical underpinning and practical experience to elevate soybean production in arid and semi-arid regions. © 2024 Chinese Society of Agricultural Machinery. All rights reserved.
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页码：340 / 351
页数：11
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