التفاصيل البيبلوغرافية
| العنوان: |
Release Kinetics and Plant Availability of Potassium in Soils of Eastern India. |
| المؤلفون: |
Zhimo, Alika N., Pal, S. K., Saha, S. |
| المصدر: |
Communications in Soil Science & Plant Analysis; 2024, Vol. 55 Issue 16, p2367-2378, 12p |
| مصطلحات موضوعية: |
POTASSIUM, POTASSIUM fertilizers, SOILS, ALFISOLS, INCEPTISOLS, LOLIUM perenne |
| مصطلحات جغرافية: |
INDIA |
| مستخلص: |
The present experiment was undertaken to characterize the K releasing pattern as well as the bioavailability of K in nine soils under three dominant soil orders of eastern India. Soils were extracted with 0.2 M sodium tetraphenyl boron (NaTPB) and perennial ryegrass (Lolium perenne L.) was grown repeatedly with and without the addition of K fertilizer to study the K release kinetics and bioavailability. The highest K release by 0.2 M NaTPB at 144 h incubation was recorded in Entisols, while the least in Alfisols. Cumulative K released was mathematically best described by a parabolic diffusion equation and the empirical constants up to a 2 h incubation period was significantly related to relative biomass yield and K uptake by ryegrass. Considering relative biomass yield and K uptake as indices of plant K availability, the sequence of K supplying capacity of the soils under different orders was: Entisols>Inceptisols>Alfisols. The K-release rate of 30.8 mg kg-1 h-1 and the ryegrass leaf K concentration of 32.1 g kg-1 were found to be critical for this experiment. Based on the critical K release rate, the maximum amount of K released for plant uptake before showing any K deficiency symptom ranged from 179.3 mg kg-1 to 596 mg kg-1 for soils under the order Entisols, 247.9 mg kg-1 to 687.84 mg kg-1 for soils under Inceptisols and 118.67 mg kg-1 to 184.25 mg kg-1 for soils under Alfisols. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
Complementary Index |
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