Journal
FIELD CROPS RESEARCH
Volume 284, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.fcr.2022.108558
Keywords
Ammoniated straw incorporation; Grain yield; Yield stability; Soil carbon and nitrogen content; Conservation agriculture
Categories
Funding
- National Key R&D Program of China [2021YFD1900700]
- Natural Science Foundation of China [51879224, 51609237]
- Key R&D projects of Shaanxi Province, China [2019NY-190]
- 111 Project of the Ministry of Education
- State Administration of Foreign Experts Affairs of China [B12007]
- EU H2020 Marie Sklodowska-Curie Actions [839806]
- Aarhus University Research Foundation [AUFF-E-2019-7-1]
- Danish Independent Research Foundation [1127-00015B]
- Nordic Committee of Agriculture and Food Research
- China Scholarship Council [202006300072]
- Aarhus University
- Marie Curie Actions (MSCA) [839806] Funding Source: Marie Curie Actions (MSCA)
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Based on a long-term field experiment on the Chinese Loess Plateau, this study found that ammoniated straw incorporation significantly increased winter wheat yield and yield stability, as well as soil organic carbon and total nitrogen content. This suggests that optimizing straw management strategies can lead to higher crop yield and improved soil quality in semi-arid areas.
Straw management strategies are highly important for maximizing the benefits of straw incorporation, which should aim to increase crop production while improving soil fertility. Ammoniated straw incorporation may be one of the potential candidates for achieving these goals. However, the effects of ammoniated straw incorporation on wheat yield, yield stability and soil properties as well as their potential relationships remain poorly understood. Based on an ongoing long-term field experiment commenced in 2011 on the Chinese Loess Plateau, we investigated the responses of soil properties, wheat yield and yield stability of winter wheat (Triticum aestivum L.) to ammoniated and conventional straw incorporation during 2017-2020. The three treatments were: (i) no straw (Control), (ii) conventional straw incorporation (CSI), and (iii) ammoniated straw incorporation (ASI). We found that the ASI treatment on average significantly increased wheat yield by 10.1% and yield stability by 19.5% compared to the CSI treatment, and significantly increased wheat yield by 26.9% and yield stability by 38.7% compared to the Control treatment. Changes in wheat yield and yield stability were positively related to ASI-induced increases in soil water storage. When compared to the Control and CSI treatments, the ASI treatment on average significantly increased soil organic carbon (SOC) content by 17.2% and 14.2% and total nitrogen (TN) content by 27.3% and 18.3% in 0-10 cm depth, and it significantly increased SOC content by 19.2% and 12.4% and TN content by 27.8% and 19.4% in 10-20 cm depth, respectively. There were positive relationships between changes in wheat yield and SOC and TN content. These results demonstrate that it is feasible to achieve higher wheat yield and yield stability while increasing SOC and TN content by optimizing straw management practices in semi-arid areas.
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