Effect of adding different rates of fermented sawdust on some chemical properties - Fertility in heavy clay soil and bean yield

Abstract

This research was conducted at Al-Nashabiya Research Station in the Damascus countryside area in Damascus Governorate for the year 2020-2021, with the aim of studying the effect of treating clay soil with different rates of organic fertilizers and fermented sawdust in the following ratios ((25%, 50%, 75%, and the rest of the percentage is added For the fertilizer recommendation in the form of fermented municipal fertilizer on some chemical and fertility properties of heavy soils and bean productivity, the effect of these additions was compared with municipal fertilizer (100%), fermented sawdust (100%), mineral fertilizer (100%) and the control.The addition of organic fertilizer treatments led to a significant increase in the soil organic matter content in the soil compared to the control, and the treatment recorded 100% fermented sawdust with the highest organic matter content amounting to (1.21%) with a significant increase compared to the treatment of mineral fertilizer and the control. while the differences were not significant with other organic treatments and the control recorded the lowest organic matter content amounted to (0.896%), while the soil content of total nitrogen increased in the organic fertilizer treatments and recorded significant differences with the exception of the treatment (75% fermented sawdust +25 % municipal fertilizer) compared with mineral fertilizer and the control. There were no significant differences between the control and the mineral fertilizer treatment (100%), and the results showed a significant superiority in the concentration of phosphorous available for the mineral fertilizer treatment over the rest of the treatments, which amounted to (60.04) mg/kg, then the rest of the treatments, respectively, 50% municipal fertilizer + 50% Fermented sawdust < 25% compost + 75% fermented sawdust 100% < 100% fermented manure < sawdust, The results also showed a significant superiority in the concentration of phosphorous available for the mineral fertilizer treatment over the rest of the treatments, reaching (60.04) mg/kg, then the rest of the treatments, respectively, 50% compost + 50% fermented sawdust > 25% fermented sawdust > 75% fermented sawdust. 100% <100% municipal fertilizer> sawdust. The results of the available potassium analysis showed a significant superiority of the organic fertilizer treatments over the 100% mineral fertilizer treatments and the control, and the results showed the superiority of the mineral fertilizer over the rest of the treatments in the available phosphorous values, followed by sawdust 100%, then the rest of the fertilizer treatments. Organic differences are not significant. . It was also found that the organic fertilizers have increased the values ​​of the cation exchange capacity compared to the 100% mineral fertilizer and the control. The superiority of mineral fertilizer with significant differences in productivity followed by the treatment of sawdust 100%, and no differences were recorded between compost and municipal fertilizer