عنوان مقاله [English]
نویسندگان [English]چکیده [English]
Introduction: Soil organic matter plays an important role in improving physical, chemical, and biological properties of soil in agriculture. Biochar is a carbon-rich organic material that produced by pyrolysis of biomass under oxygen limited conditions and it improves the physical and chemical properties of soils. In recent years, biochar application in soil has been considered as a desirable way to improve physical conditions and increase soil moisture storage capacity. Achieving any of the above objectives depends on the physical and chemical structure of the biochar and its application to the soil.The main objective of this paper was to evaluate the effects of biochar, produced from date palm’s leaves, on the physical properties and hydrological behavior of a sandy clay loam soil by carrying out under greenhouse conditions.
Methods: For this aim, Pyrolysis at 400 degree of centigrade at 2 hour in an electric furnace biochars was obtained. Biochars were in powdered form and evenly added to soil (air-dried and passed through a 4 mm sieve) and incubated for 2 months. Therefor with determination of soil moisture content at field capacity, one, three, six and nine months after mixture soil and biochar, were measured hydraulic conductivity (kS) by taking soil samples from the pots. By measuring gravimetric water content at saturation percentage (SP), field capacity (FC) and permanent wilting point (PWP), plant available water content (PAWC) and relative field capacity (RFC) calculated. The Factorial experiment was conducted in a completely randomized design with two factors. The factors of this experiment was including amendment (palm’s leaves and biochar), application level (0, 0.5, 1, and 2% w/w), and time (1, 3, 6, and 9 month incubation).The treatments in this experiment were zero (B0), 0.5 (B1), 1 (B2) and 2% (B3) of biochar and zero (control) (D0), 0.5 (D1), 1 (D2) and 2% (D3) of palm leaves (zero, 18, 36 and 72 ton/ha, respectively) in three replications. Biochar were in powdered form and evenly added to soil (air-dried and passed through a 4 mm sieve) and incubated for 2 months.
Results: The results showed a significant difference (P