تأثیر کاربرد بیوچار اصلاح شده بر ویژگیهای شیمیایی خاک و جذب عناصر غذایی در نیشکر واریته صفیه صرخه CP73-21. (Persian)

Modified biochar application effects on soil chemical properties and nutrients uptake in sugarcane cv. CP73-21. (English)

One of the major problems of soils in arid and semi-arid regions is the lack of organic matter. Chemical fortification of biochar is effective in increasing biochar's efficiency to improve the chemical properties and fertility of the soil and plant growth. The purpose of this research was to investigate the effect of biochar and modified sugarcane bagasse biochar on the nutrient status, soil chemical properties, nutritional status and sugarcane yield. Sugarcane bagasse biochar was prepared and modified and its properties were measured. This research was done in a completely randomized design with 4 treatments, including 1- control (without the use of biochar), 2- sugarcane bagasse biochar, 3- sulfuric acid modified biochar, 4- citric acid modified biochar and 4 replications in pots and greenhouse condition. The biochar treatments were applied before plantantion at 1% w/w level. At the end of the experiment period, plant biomass yield and soil chemical properties were measured. The results showed that the application of all treatments caused a decrease in soil pH (0.24-0.64 units), but increase cation exchange capacity (1.55 to 1.84-fold), organic carbon (2.2 to 2.6-fold) and available concentration of phosphorus (1.7 to 2.2-fold), potassium (1.29 to 1.85-fold), iron (1.65 to 1.78- fold) and zinc (1.41 to 1.69-fold) in the soil. The use of citric acid modified biochar had the greatest effect in increasing the height (19.4%) and the dry weight of the shoot (10.8%) and nutrient uptake in shoot compared to the control treatment. In general, biochar prepared from sugarcane bagasse and modified with citric acid could be effective in improving soil chemical properties, nutrient availability and sugarcane growth and nutrition under the studied soil conditions. [ABSTRACT FROM AUTHOR]

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