PJB-2023-513
Organic amendments enhance soil micronutrient dynamics and transformations, thereby improving the residual effect on wheat crops.
Abid Kamal
Abstract
Nutrient balance is crucial for increasing crop yields. Excessive use of nutrients can lead to soil mining, deteriorating productivity, and soil health. Replenishing nutrients directly impacts soil health and productivity. This research investigates the effects of long-term integrated use of organic and inorganic fertilizers on soil nutrient status. A study at the University of Agriculture Peshawar-Pakistan conducted two-year field experiments in 2018-2020 to investigate the residual effects of organic amendments on soil fertility, on wheat crops. The experiments of wheat crops were tested in the plot of maize varieties Azam and hybrid CS 220. To investigate the residual effect of Treatments were Control, Half (H) NPK, Full NPK, Legume Residues (LR) @ 10 tons ha-1, Humic Acid (HA) @ 5 kg ha-1, Biochar (BC) @ 10 tons ha-1, LR + HNPK, HA + HNPK, BC + HNPK, HLR +HHA+ HNPK, HLR + HBC + HNPK, HBC + HHA + HNPK. The experiments were conducted using two factorials randomizing complete block design with three replications. The residual effect of treatments on wheat crops was statistically significant in terms of wheat yield and nutrients. The maximum soil micronutrients Zn, Mn, Fe concentration in soil and Cu, Mn, Fe concentration in stove were recorded in HBC + HHA + HNPK treatment. As compared to control, significant highest Zn contact in grain were recorded in plots where only BC + HNPK was applied. The highest Cu concentration in soil was recorded in BC, Ha, HA + HNPK, and Cu, Mn, Fe concentration in grain were recorded in HLR + HBC + HNPK and Zn concentration in stove were recorded in HLR + HBC + HNPK treatment. Data regarding variety, the residual effect of wheat in the plots of maize variety, under similar treatments in the plots of Azam variety performed better in term of micronutrients. Overall, the soil fertility of micronutrients was better in the 2nd year as compared to the 1st year. Thus, the application of both inorganic and organic amendments together provides a sustainable and economical method of maintaining soil fertility. Investigating the impact of long-term chemical fertilizers and organic additions on soil fertility is the goal of this present study. The results of the study indicated that soil fertility may be increased more effectively by applying organic amendments and inorganic fertilizers together than by applying either organic or inorganic fertilizers alone.
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