Niswati, Ainin (2011) Perubahan Kandungan NH4+ pada Tanah Sawah Diberi Pupuk Berbeda. In: Prosiding Semirata Bidang Ilmu-ilmu Pertanian BKS-PTN Wilayah Barat Tahun 2011, 23-25 Mei 2011, Universitas Sriwijaya, Palembang.

Ainin - 2011 Prosiding Semirata Unsri Ketua - 2011.pdf - Published Version

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The use of Azolla in paddy field has been suggested because of various advantages, such as nitrogen source. A greenhouse experiment was conducted to study the effect of singly nitrogen, phosphorus, and potassium or their combination on soil ammonia (NH4+) content that was treated by Azolla, and to study Azolla decomposition in paddy soils. The experiment was arranged by randomized completely block design with three replications. The treatments in soil were control (without NPK), fertilizers), four nitrogen-phosphorus-potassium PK, NP, and NK with each dosage at 100 kg ha-1. The observations were conducted at 3, 5, 7, 14, and 2l days after treated. "The results showed that fertilization with N, P, or K and their combination give significantly effect on NH4+ content in soil. NH4+ content was higher in soil treated with NPK, NP, or NK than that in control or PK at 3, 7, and 14 days after.treatment. The NH4+ content in soil increased with the time of incorporated of Azolla in paddy soil. Dffirences in soil nutrient were not significantly effect on N and C content of Azolla as well as decomposition rate of Azolla. However, N- total of Azolla increased and C-total of Azolla decreased along with decomposition of Azolla in paddy soil.

Item Type: Conference or Workshop Item (Paper)
Subjects: S Agriculture > S Agriculture (General)
Divisions: Fakultas Pertanian (FP) > Prodi Ilmu Tanah
Depositing User: Prof Dr Ainin Niswati
Date Deposited: 16 Nov 2016 03:13
Last Modified: 16 Nov 2016 03:13

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