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| Biological effects of consecutive application of corncob biochar to potato plants |
| Received:February 08, 2020 |
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| KeyWord:corncob;biochar;potato;yield |
| Author Name | Affiliation | E-mail | | ZHANG Wei-ming | College of Agronomy, Shenyang Agricultural University/Biochar Engineering Technology Research Center of Liaoning Province, Shenyang 110866, China | | | WU Di | College of Agronomy, Shenyang Agricultural University/Biochar Engineering Technology Research Center of Liaoning Province, Shenyang 110866, China | | | ZHANG Hong-gui | College of Agronomy, Shenyang Agricultural University/Biochar Engineering Technology Research Center of Liaoning Province, Shenyang 110866, China | | | HUANG Yu-wei | College of Agronomy, Shenyang Agricultural University/Biochar Engineering Technology Research Center of Liaoning Province, Shenyang 110866, China | | | GUAN Xue-chao | College of Agronomy, Shenyang Agricultural University/Biochar Engineering Technology Research Center of Liaoning Province, Shenyang 110866, China | | | CHEN Wen-fu | College of Agronomy, Shenyang Agricultural University/Biochar Engineering Technology Research Center of Liaoning Province, Shenyang 110866, China | wfchen5512@126.com |
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| Abstract: |
| To determine the effect and application potential of biochar with different materials on potato production, biochar was made from corncob. The structure and main physical and chemical characteristics of the biochar after carbonization were determined, and its effect on potato plant growth, yield, quality, and disease occurrence was studied via field experiments. The results showed that the corncob biochar was rich in carbon with a good microporous structure, various nutrient elements, and cation exchange capacity. The total pore volume and specific surface area were respectively 4.37 and 3.89 times higher than before carbonization, making the biochar appropriate for agricultural application. Furthermore, when the corncob biochar was applied to sandy soil with continuous cropping, the plant height and leaf and stem dry matter accumulation increased significantly, which promoted early growth development of the plant. The proportion of medium and large potatoes and plot average yield increased by 44.67% and 29.01%, respectively, compared with that of the control for two consecutive years, and the yield of the C2 treatment(4500 kg·hm-2)was the highest. At the same time, the average dry matter, starch, soluble protein, and reducing sugar content of potato tubers increased by 7.78%, 14.59%, 19.53%, and 15.38%, respectively, compared with that of the control, and the commodity, food, and nutrition quality improved to some extent. In addition, the incidence of potato scab and late blight in the corncob biochar treatment declined significantly with 93.43% and 87.77% on average, respectively, compared to that of the control. Generally, corncob biochar had the biological characteristics of "promoting growth, increasing yield, improving quality and disease resistance" and was therefore suitable for potato production. |
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