| Effects of nine varieties of return to field spring rape on organic matter and oxidation stability of tidal soil |
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| DOI：10.7606/j.issn.1000-7601.2022.01.24 |
| Key Words: spring rape return to field soil organic matter humus oxidation stability |
| Author Name | Affiliation | | YUAN Miaomiao | College of Resource and Environment, Tianjin Agricultural University, Tianjin 300384, China | | XIANG Chunyang | College of Resource and Environment, Tianjin Agricultural University, Tianjin 300384, China | | ZHAO Qiu | Institute of Resources and Environment, Tianjin Academy of Agricultural Science, Tianjin 300192, China | | SHI Xinqian | College of Resource and Environment, Tianjin Agricultural University, Tianjin 300384, China | | DONG Jiaxi | College of Resource and Environment, Tianjin Agricultural University, Tianjin 300384, China | | TIAN Xiuping | College of Resource and Environment, Tianjin Agricultural University, Tianjin 300384, China |
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| Abstract: |
| To increase the content of soil organic matter, organic matter quality and soil fertility in northern China, a field experiment was carried out to examine the impact of returning different cultivated varieties of spring rape to field on soil organic matter and its oxidation stability. The results showed that Zhongyoufei 1901 had the highest biomass. Zhongyoufei 1904 had the highest plant carbon content (69.51 %), followed by Zhongyoufei 1901 (65.06 %). The highest total carbon output of spring rape was Zhongyoufei 1901 (4 662.25 kg·hm-2). Spring rape significantly increased the content of soil organic matter, humus and easily oxidized organic matter, and reduced the Kos values. Different varieties of spring rape had different performances. Of which Zhongyoufei 1901 and Zhongyoufei 1907 increased the soil organic matter the most, which both increased by 7.24 g·kg-1 compared with prior to returning spring rape to field. The humus content and easily oxidized organic matter had also the largest increase in Zhongyoufei 1901, which increased by 11.24 g·kg-1 and 16.55 g·kg-1 respectively compared with prior to returning spring rape, which was significantly higher than other varieties. The soil organic matter Kos value of different rape varieties was significantly lower than that of the control after returning to field, and the decline was significant in Zhongyoufei 1901, Zhongyoufei 1906 and Zhongyoufei 1907. Soil organic matter, humus and easily oxidized organic matter were extremely positively and significantly correlated with spring rape biomass and total carbon input. There were also extremely significantly and positively correlations between soil organic matter, humus and easily oxidized organic matter. Comprehensive evaluation of gray correlation degree indicated that among nine spring rape varieties in the experiment, Zhongyoufei 1901 had the best effect on soil fertility, followed by Zhongyoufei 1907. |
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