首页|STATUS OF AVAILABLE PLANT NUTRIENTS AS INFLUENCED BY SOIL SOLARIZATION
STATUS OF AVAILABLE PLANT NUTRIENTS AS INFLUENCED BY SOIL SOLARIZATION
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NSTL
SOIL solarization is a method of heating the soil by capturing the solar energy by means of transport polyethene mulch during the period of bright sunshine for the control of soil borne pathogens and weeds (Katan et al., 1976). There is conseqential enhancement of thermal heat capacity of soil which eventuates in faster degradation of organic matter and enhanced availability of plant nutrients in the soil (Haynes, 1987). With these in view, a field experiment was conducted at the Agronomy Field Unit,Main Research Station, University of Agricultural Sciences, Bangalore during 1998-99 to study the status of available plant nutrients as influenced by soil solarization. The study comprised of seven treatments consisting of two transparent polyethylenethickness viz., 0.05 and 0.1 mm, three duration of solarization viz., 15, 30 and 45 days during April and May of 1998 and a control. The soil was sandy loam in texture having 6.53, pH, 0.21 d Sm~(-1) of EC, 161.25 kg~(-1) available nitrogen, 33,25 kg ha~(-1) available P_2O_5, 29.45 kg ha~(-1) available K_2O, 10.01 ppm available S, 0.50 me. 100~(-1) g soil of Exch. Ca, 0.21 me. 100 g~(-1) soil of Exch. Mg and 0.14 me 100 g~(-1)soil of Exch. Na. The experiment was laidout in RBD with 3 replications in 4.5x 3.0 m plots. After thorough land preparation, the plots were irrigated to field capacity and the transparent polyethylene sheets of required size were spread on the respective plots depending on the treatments and were sealed at all the sides to makeit air tight with moist soil. FYM 10 t ha~(-1) was incorporated before spreading polyethylene sheets. Soil temperature was recorded using piercing type of mercury thermometer at 5 cm soil depth in both covered and unconvered plots at the end. Soil samples collected from 0 to 15 cm soil depth immediately after solarization were used for the estimation of nutrient status as per Jackson (1973). Similarly exchangable Ca, Mg and Na were analysed by EDTA method as outlined by Jackson (1973.)
NSTL
