| Autor: |
Citraresmini, Ania, Bachtiar, Taufiq, Flatian, Anggi Nico, Robifahmi, Nur, Slamet, Sudono |
| Předmět: |
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| Zdroj: |
AIP Conference Proceedings; 2021, Vol. 2338/2381 Issue 1, p1-6, 6p |
| Abstrakt: |
The rice production level is sloping off due to the excessive use of urea fertilizer. This condition then opens the idea that other mineral elements, namely P and K and micro elements must be in a balanced state. Several researches showed that rice plant is the second highest accumulator for microelement Silica, which is able to act as a soil pH buffer thereby increasing P availability for plants. The research was conducted in the greenhouse belongs to Fertilization and Plant Nutrition Group PAIR – BATAN in February-May 2015, with the aim of obtaining information on the dynamics of Silica element on its role as a buffer for P-nutrient availability. A randomized block design was applied in the experiment, consisting of 6 treatments and 3 replications. The treatment applied is as follows : F0 = control (no fertilization); F1 = NPK fertilization at the recommended dosage; F2 = NK fertilization + inoculated rock phosphate (IRP) at dose of 138 kg ha−1; F3 = NK fertilization + IRP + Silica mineral 400 mg kg−1; F4 = NK fertilization + IRP + Silica mineral 300 mg kg−1; F5 = NK + IRP + Silica mineral 200 mg kg−1. The inoculant used is Bacillus sp and Pseudomonas sp, while the rice husk ash was used as the source of Silica mineral. Phosphorus nutrient dynamic as an analogy for Silica movement is traced by using 24 mCi P-32 radioisotope. Parameters observed are N-K-P-Si uptake, P derived from several P sources; and P and Si correlation. The results showed an increase in the availability of P at the highest dose of Silica mineral namely 400 mg kg−1 (treatment D) indicated by the highest P-uptake and Si-uptake. Tracing with 32P radioisotope shows that P uptake derived from P fertilizer enriched by Silica is higher than P uptake derived from P fertilizer without Silica and P uptake derived from soil. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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