Salam, Abdul Kadir and Yusnaini, Sri and Rachmalia, Saja (1998) Sixteen Week Changes in Phosphatase Activities in An Organic Matter Treated Ultisol from Tan jungan Lampung. Pros Sem Pertemuan Ilmiah Tahunan Peranan Mikrobiologi dalam Agroindustri untuk Menunjang Ketahanan Pangan Nasional. pp. 332-339. ISSN 979-8958-49-7


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Organic matter is an energy source for soil microorganisms and, hence, it is suggested that soil enzymatic activities affected by soil microorganisms may increase with soil treatment with organic matters. This research was to evaluate the changes in phosphatase activities for 16 weeks in an organic matter (alang-alang and cassava leaves, chicken and goat dungs) treated soil. Soil sample (Ultisol) was treated with finely chopped or ground organic matters at 0-6 ton ha-1 and was incubated for 16 weeks at 40% moisture content (room temperature). Enzymatic analyses (acid and alkaline phosphatase) were conducted at 2, 4, 8, and 16 weeks after soil treatment. The activities of phosphatase in all treatment consistently increased with incubation time reaching peaks at about 4-12 weeks and decreased at longer incubation times, in a good correlation with the changes in soil pH. All organic matters consistently increased the activities of phosphatases during the first 4 weeks but the effects were not different. At week 16, the higher rates of organic matters in most cases lowered the activity of acid phosphatase.

Item Type: Article
Uncontrolled Keywords: Incubation Time, Organic Matters, Phosphatases, Soil Enzymes, Tropical Soils
Subjects: S Agriculture > S Agriculture (General)
Divisions: Fakultas Pertanian (FP) > Prodi Ilmu Tanah
Depositing User: Abdul Kadir Salam
Date Deposited: 26 Apr 2018 04:00
Last Modified: 26 Apr 2018 04:00

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