Yulianto, Melinda Trisya (2026) Kajian Pemberian Asam Humat dan Pupuk Nitrogen terhadap Ketersediaan Nitrogen Tanah dan Serapan Nitrogen Tanaman Padi pada Lahan Terdampak Sipramin. Undergraduate thesis, UPN Veteran Jawa Timur.
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Abstract
Paddy fields affected by sipramin have high sodium content, which causes degradation of the physical, chemical, and biological properties of the soil. This condition has an impact on the reduction of nutrient availability in the soil and nutrient absorption by plants. This study aims to examine the effect of humic acid and nitrogen fertilizer sources on soil nitrogen availability and nitrogen absorption by paddy in fields affected by sipramin. The study was conducted in a greenhouse at the Faculty of Agriculture, UPN “Veteran” East Java, using a completely randomized factorial design with two factors: humic acid dosage (0, 20, 40, and 60 kg ha⁻¹) and nitrogen fertilizer source (no N fertilizer, NPK Phonska, Urea, KNO₃, and MAP) with an equivalent N dosage of 92 kg ha⁻¹. The results showed that the combination of treatments did not have a significant effect on increasing soil N availability and rice plant N uptake, but the H1N4 treatment (20 kg ha⁻¹ humic acid + MAP) tended to maintain stable soil N availability and produced the highest N uptake of 0,30 g N per plant. These results indicate the potential of combining lowdose humic acid with MAP fertilizer in supporting nitrogen utilization efficiency in rice fields affected by sipramin. Keywords: Fertilizer, Humic acid, Nitrogen, Rice, Sipramin
| Item Type: | Thesis (Undergraduate) | ||||||||||||
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| Subjects: | S Agriculture > S Agriculture (General) > S590-599.9 Soils. Soil science S Agriculture > S Agriculture (General) > S631-667 Fertilizers and Improvement of the soil |
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| Divisions: | Faculty of Agriculture > Departement of Agritechnology | ||||||||||||
| Depositing User: | Melinda Trisya Yulianto | ||||||||||||
| Date Deposited: | 27 Jan 2026 07:19 | ||||||||||||
| Last Modified: | 27 Jan 2026 07:30 | ||||||||||||
| URI: | https://repository.upnjatim.ac.id/id/eprint/49120 |
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