| Effects of different long\|term fertilization on crop yield and soil nutrients under rotation planting in arid region |
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| DOI：10.7606/j.issn.1000-7601.2021.03.15 |
| Key Words: long term fertilization organic manure chemical fertilizer soil nutrients crop yield nutrient use efficiency |
| Author Name | Affiliation | | LIU Qiang | College of Resources and Environmental Engineering, Tianshui Normal University, Tianshui, Gansu 741000, China； Institute of Soil and Water Conservation，Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi 712100, China
University of Chinese Academy of Sciences, Beijing 100049, China | | MU Xingmin | Institute of Soil and Water Conservation，Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi 712100, China
Institute of Soil and Water Conservation，Northwest A&F University, Yangling, Shaanxi 712100, China | | WANG Xinmin | College of Resources and Environmental Engineering, Tianshui Normal University, Tianshui, Gansu 741000, China | | ZHANG Wen | College of Resources and Environmental Engineering, Tianshui Normal University, Tianshui, Gansu 741000, China | | GAO Peng | Institute of Soil and Water Conservation，Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi 712100, China
Institute of Soil and Water Conservation，Northwest A&F University, Yangling, Shaanxi 712100, China | | ZHAO Guangju | Institute of Soil and Water Conservation，Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi 712100, China
Institute of Soil and Water Conservation，Northwest A&F University, Yangling, Shaanxi 712100, China | | SUN Wenyi | Institute of Soil and Water Conservation，Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi 712100, China
Institute of Soil and Water Conservation，Northwest A&F University, Yangling, Shaanxi 712100, China |
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| Abstract: |
| In this study, we aimed to investigate the effects of long\|term fertilization on crop yield and nutrients with different fertilization treatments in a dryland crop rotation system on the Loess Plateau, and to facilitate the selection of the optimal farmland fertilization management approaches. Field experiments with nine fertilization treatments were carried out during 2015-2018. The different fertilization treatments increased soil nutrient content in the four consecutive years, with the M treatment exhibiting the most significant increase in soil organic carbon content at 112%, 107%, 101%, and 103%, in the four consecutive years, respectively, compared with the control (CK). The MN treatment exhibited the most significant increase in soil available nitrogen content, which increased by 155%, 167%, 157%, and 135%, respectively, compared with the CK. Furthermore, the MP treatment showed the most significant increase in soil available phosphorus content at 843%, 833%, 929%, and 935%, respectively, compared with the CK. In addition, the M treatment exhibited the most significant increases in soil available potassium at 124%, 126%, 121%, and 113%, respectively, compared with the CK. The different fertilizers significantly influenced crop yield; crop yield under the MNP treatment increased most significantly at 81%, 337%, 320%, and 239%, respectively, compared with the CK. Significant differences were obtained in the crop yield sustainability index among the different fertilization treatments, with the highest in the MNP treatment, followed by the MN treatment, and the lowest in the CK treatment. The findings of this study demonstrate that the combination of organic and chemical fertilizers improves crop yield, supplement soil nutrients, regulates the rate of nutrient release and its intensity, and meets the nutrient demands of crops over the entire growth period, as well as facilitates high and stable yields. |
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