Effect of Potassium Humate Application on Yield and Nutrient Uptake of Maize Grown In a Calcareous Soil | ||||
| Alexandria Science Exchange Journal | ||||
| Article 5, Volume 39, July-September - Serial Number 3, July 2018, Page 412-418 PDF (159.23 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/asejaiqjsae.2018.10601 | ||||
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| Authors | ||||
Sherif M. Ibrahim* ; Ali Ali 
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| Department of Soil Fertility and Microbiology, Desert Research Center, Cairo | ||||
| Abstract | ||||
| Potassium humate (K-humate) is a promising natural resource to improve yield and nutrient uptake by crops. A field experiment was conducted to assess the efficacy of K-humate application in combination with chemical fertilizers on enhancing yield and nutrient uptake of maize grown in a calcareous soil, western of Nile Delta, Egypt in two successive summer seasons (2015 and 2016). The K-humate was applied at a rate of 15 kg ha-1 along with an increasing rate of chemical N, P and K fertilizers, varying from 0 to 125% of the recommended dose. The results indicated that grain yield of maize significantly responded to application of K-humate. The results also indicated that the computed optimum grain yield of 7463 kg ha-1 without application of K-humate can be obtained by applying 98% of the recommended dose of chemical fertilizers. However, in the presence of K-humate, the optimum yield of 8310 kg ha-1 can be obtained by applying about 73% of the recommended dose of fertilizers. Nutrients uptake responded linearly to the increasing rates of chemical fertilizers, without or with K-humate application. However, the rate of increase in the presence of K-humate was substantially higher than that recorded at its absence. The difference in the increase of nutrients uptake was the highest for P, then N and K in the presence of K-humate. This study suggests that K-humate has the potential to increase crop yield, nutrient uptake and reduce the amounts of applied chemical fertilizers in calcareous soils. | ||||
| Keywords | ||||
| K-humate; Maize; nutrient uptake; Calcareous soil | ||||
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