بررسی زراعی و اقتصادی تاثیر تناوب گندم با برخی محصولات زراعی در جنوب خوزستان

This study in order to investigate agronomy and economic impact of different rotations some crops on the stability and increase of the grain yield wheat in fixed plots with 6 rotations treatment were performance in randomize complete blocks design for five years in agricultural research station in Shahor without any soil salinity limit for middle and south of Khuzestan area. The results of simple and combine analysis variance wheat grain yield of rotations showed that the performance variety of crops more than two crops in the past five years have had to first year implementation of superiority Grain yield wheat of forth and fifth rotation because of the variety of crops at the end of rotation have superiority. Also being less than the amount of salinity in soil fifth rotation in comparison with second rotation that is common rotation in area indicated that can be affected the amount of salinity soil. Common rotation in region incase of the lack of cultivation in the summer become soil salinity due to evaporation of the surface of the soil. In regards of in the south province of Khuzestan major rotation is wheat-fallow and in some part of area if provided irrigation water rotation is wheat-rice In the case of drainage fields and provided water and materials and technology in order to optimum use of capital and protected soil stability and the decrease in salinity and wind erosion and increase soil fertility and creating employment direct and indirect need to diversity of crops in the winter and summer. This result in the results achieved in rotations of 4 and 5.