نوع مقاله : مقاله پژوهشی
1 دانشگاه لرستان
2 دانشیار گروه زراعت و اصلاح نباتات دانشکده کشاورزی دانشگاه لرستان
3 استاد گروه زراعت پردیس کشاورزی و منابع طبیعی دانشگاه تهران
4 استادیار گروه خاکشناسی دانشکده کشاورزی دانشگاه لرستان
عنوان مقاله [English]
This experiment was done to evaluate the effects of soil tillage methods on chemical and biological properties of the soil along with quantitative traits of silage corn after chickpea as a preceding or companion crop. The experiment was conducted for two cropping years of 2013-15 at farm of Tehran University. The experiment was set up as a split plot in RCBD in four replications. The main factor considered three soil tillage methods (conventional, minimum and no-tillage) and the sub-factor included three varieties of maize (SC704, Zp677, Maxima). The experimental units covered by chickpea residue by at least 30 percent of the surface area. Results showed that the no-tillage and minimum tillage treatments had higher amount of soil organic carbon, pH and number and body mass of earthworm than the conventional tillage treatment. Tillage treatments had no significant effect on measured soil total nitrogen, electrical conductivity and sodium. Also, the highest maize wet and dry stem weight (691.5 and 1866.5 gm-2), Ear dry weight (664.4 gm-2) and total plants wet weight (4896.9 gm-2) observed in Zp677 maize cultivar. Conventional and minimum tillage methods had significant effects on leaf and ear wet and dry weights and total plant dry weight traits. Thus, in the 2nd year of this experiment, no-tillage was more effective than other tillage methods. But, there was no significant effect between no-tillage and conventional tillage treatments in the second year. According to the results, both conservation tillage methods is recommended as replacement methods for conventional tillage in maize/chickpea rotation.