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| DOI：10.13522/j.cnki.ggps.20190200 |
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| Effects of Biochar for Abating Salt Stress and Promoting Seeding Growth of Winter Wheat in a Saline Soil |
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XIAO Kang, SUN Yaqiao, MA Weiguo
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1.School of Environmental Science and Engineering, Chang’an University, Key Laboratory of Subsurface Hydrology and Ecological Effect in Arid Region of Ministry of Education, Xi’an 710000, China;2. Third Middle Schoolof Pucheng, Weinan 715505, China
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| Abstract: |
| The surface soil of the Yellow River Delta is rich in salt, which makes the soil salinized, compact and barren. The salinization hazard with NaCl as the main component directly affects the quality of coastal soil. Adding biochar to saline-alkali farmland can improve soil properties and promote crop growth. 【Objective】The purpose of this paper is to clarify the changes of soil salt ions and winter wheat seedling growth after adding biochar to saline soil. 【Method】A field experiment was conducted to investigate the effects of low dose (0~4 g/kg) of Reed carbon on soil salt ions, potassium-sodium ratio in wheat seedlings, potassium utilization efficiency and seedling biomass. 【Result】The application of biochar could reduce the salt ions in soil solution, increased the potassium-sodium ratio in the winter wheat seedlings and the potassium use efficiency of the wheat seedlings, and increased the seedling biomass of winter wheat; The salt reduction and the incremental effect under the addition of 4 g/kg biochar use was the most obvious. Compared with CK, the Na+ in soil solution decreased by 9.43%, the K/Na and potassium use efficiency of seedlings increased by 56.80% and 25.48%, respectively, and the biomass of wheat seedling increased by 15.72%. 【Conclusion】 Biochar application can promote the increase of biomass by holding Na+ in soil solution and increasing K/Na and potassium utilization of winter wheat seedlings. The research can provide a theoretical basis for the process mechanism of biochar for salt reduction and fertilization, increase efficiency and increase yield, and provide preliminary guidance for the feasibility of biochar for salinized soil improvement. |
| Key words: immobilization rate; K/Na; potassium use efficiency; biomass of wheat seedings; reed biochar |
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