Check Interaction of Three Different Tillage Methodsand and crop residual management on Soil Physical Properties and Rice Growth

One of the major problems of rice cultivation in Guilan is traditional rice cultivation along withautumn tillage and burning last year s residual, which besides wasting this valuable organic source is followed by environmental pollution in September and October each year.This study aimed to evaluate three different methods of tillage on soil physical properties and rice growthin crop residual burning and conservation. Therefore, an area of 1800 square meters was chosen inIslamabad Village,Pirbazar District, Rasht.A factorial experiment was designed and conducted in a randomized complete block design with 6 treatments in 3 replications and in 18 plots (each plot= 10 × 10 square meters).Treatments included tillage factor with no-tillage, autumn and winter tillage methods; and residue management factor included crop residual burning and conservation. The results showed that the amount of soil organic matter in residual burning and residual conservation was 2.18% and 2.62%, respectively, showing a 0.44% increase in organic matter. The amount of organic matter in no-tillage method (2.20%)showed a significant decrease of 0.32% and 0.38% compared with autumn tillage (2.52%) and winter tillage (2.58%), respectively. Surface water infiltration in soil before performing treatments was 2.01 mm per minute, which was significantly increased by 2.81 mm per minutein residual conservation treatment, 2.91 mm per minute in winter tillage and 2.38 mm per minute in autumn tillage. Rice seed weight was significantly increased in residual conservation and no-tillage conditions. According to the results, of product residues along with plowing in the province s farms is recommended.