| Effects of one\|time biochar input on soil properties and corn yield in irrigation sandy soil |
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| DOI：10.7606/j.issn.1000-7601.2021.04.17 |
| Key Words: biochar irrigation sandy soil soil properties corn yield |
| Author Name | Affiliation | | ZHANG Yunshu | Institute of Soil, Fertilizer, and Agriculture Water Conservation, Xinjiang Academy of Agricultural Sciences, Urumqi, Xinjiang 830091, China | | TANG Guangmu | Institute of Soil, Fertilizer, and Agriculture Water Conservation, Xinjiang Academy of Agricultural Sciences, Urumqi, Xinjiang 830091, China | | LONG Xiaoshuang | Agriculture Technology and Popularization Center of Hotan Region, Hotan, Xinjiang 848000, China | | GE Chunhui | Institute of Soil, Fertilizer, and Agriculture Water Conservation, Xinjiang Academy of Agricultural Sciences, Urumqi, Xinjiang 830091, China | | XU Wanli | Institute of Soil, Fertilizer, and Agriculture Water Conservation, Xinjiang Academy of Agricultural Sciences, Urumqi, Xinjiang 830091, China |
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| Abstract: |
| In this paper, the effect of biochar on irrigation sandy soil properties and corn yield was analyzed throughout the years of 2015 to 2018. The effects of different applications of biochar (0, 22.5, 67.5, 112.5, 225.0 t·hm-2) on soil properties and corn yield were studied. The results showed that the soil bulk density was significantly lower after one\|time application of biochar in 2011. Compared with the initial soil bulk density of 1.48 g·cm-3, the soil bulk density decreased to 1.18~1.24 g·cm-3 after 8 years. Biochar application significantly increased the contents of total nitrogen, organic matter and available potassium in soil, but had no obvious effects on the content of soil available nitrogen. Compared with the control group, the contents of total nitrogen, organic matter and available potassium increased by 14.42%~49.43%, 22.02%~74.25% and 1.27%~18.64% respectively after 8 years. With the extension of the location test, the effect of biochar on soil carbon and potassium reached the maximum after 6 years of one\|time application, and then decreased year by year. It was necessary to apply biochar again after 6 years to improve soil fertility. 67.5 t·hm-2 was the best amount. Application of biochar significantly increased corn yield by 9.4%~35.5%. Therefore, biochar can be used as an effective measure to improve soil fertility and corn yield in irrigation sandy soil. |
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