تاثیر زمان به خاک دادن برخی گیاهان کود سبز بر محتوای عناصر غذایی خاک

In order to study the effect of time incorporation to the soil of different green manure crops on soil nutrient contents a field experiment was carried out in experimental farm of Agricultural Faculty of ShahidChamran University of Ahvaz at 2013-2014 growing season. Experimental design was randomized complete block as a split-plot with three replications. The main plots consisted of three time incorporation to the soil of green manures includes 40,50 and 60 days after planting and sub-plots including of different green manure crops including Sorghum, Barley, mungbean, Intercropping of barley and mung bean and fallow (without green manure application). Results showed that the green manure treatments had significant effects on soil N,P and K contents compared to control(fallow). The highest soil nitrogen contents(0.085%) was obtained at mungbean green manure treatment. But the highest soil phosphurus contents(6.43 mg/kg) was revealed at mungbean and barley intercropping green manure treatments.Also the highest soil potassium content were found at barley and sorghum green manure by 70.75 and 70 mg/kg respectively.
Key words: Green manure, Time incorporation to the soil, Soil Nutrient Content.