Judul: Model Pemantauan Pelaksanaan Pembayaran Jasa Lingkungan di DAS Cidanau dengan Pendekatan Kerapatan Tegakan
Abstrak: Pembayaran Jasa Lingkungan (PJL) merupakan pemberian imbal jasa berupa pembayaran finansial dan non finansial kepada pengelola lahan atas jasa lingkungan yang dihasilkan. Persyaratan dalam pembayaran jasa lingkungan di DAS Cidanau yaitu jumlah tegakan yang ada dan tumbuh dengan baik tidak kurang dari 500 (lima ratus) batang per hektar. Saat ini, pemantauan jumlah tegakan di lahan PJL dilakukan dengan cara menghitung langsung jumlah tegakan per hektar per lahan. Pemantauan dengan metode tersebut memerlukan waktu yang cukup lama dan biaya yang tidak sedikit. Pemantauan jumlah tegakan pada lahan PJL di DAS Cidanau perlu dilakukan menggunakan metode baru yang lebih efisien. Penelitian dilakukan di DAS Cidanau, Kabupaten Serang dan Kabupaten Pandeglang, Provinsi Banten. Model pendugaan kerapatan tegakan dengan leaf area index merupakan model pendugaan terbaik yang dapat digunakan untuk menduga kerapatan tegakan pada lahan pembayaran jasa lingkungan di DAS Cidanau. Persentase kerapatan kanopi di dua kelompok tani hutan semakin meningkat setelah periode pembayaran jasa lingkungan.
Keyword: basal area, forest canopy density, kerapatan tegakan, leaf area index

Judul: Peran pembayaran jasa lingkungan (PJL) hutan terhadap sifat hidrologi lahan di DAS Cidanau, Banten
Abstrak: Payment for Environmental Services (PES) in Cidanau watershed is the payment for environmental services of Forest Ecosystem to control the water yield in Cidanau watershed. This PES is driven by issue of water yield decreasing, suggested due to forest encroachment of Rawa Danau. The role of PES for water yield control is approached through its role for the soil hydraulic properties. The research aim to analyze the difference of soil hydraulic properties managed with and without PES incentives. The research includes analysis of land use changes, infiltration rate and soil hydraulic properties of land with and without PES, and simulation of water flow as the response of rainfall. Implementation of PES in Cidanau watershed is able to maintain the good condition of forest. Soil hydraulic properties of land with PES is relatively better. The infiltration rate of land with PES is higher than without PES. Gravitational and available water is higher in land of without PES whereas the soil hydraulic condactivity is higher in land of with PES. Kostiakov and Horton models both are able to predict the rate of infiltration. Kostiakov is better than Horton model relatively. Log Normal Kosugi model was able to predict a soil-water retension curve and unsaturated hydraulic conductivity. One dimensional vertical flow simulation shown the higher flow in land with PES than without PES.
Keyword: Bogor Agricultural University (IPB), soil hydraulic properties, infiltration, Payment for environmental services of forest

Judul: Sintesis dan Pencirian Kompleks Fe(III)-Kuersetin
Abstrak: Quercetin belongs to flavonols which is able to chelate metal ions. Quercetin may chelate metal ions at 3’,4’-catechol, 3- or 5-hydroxycromone sites. In this study, quercetin was complexed with Fe(III). The complex with Fe(III) ions from FeCl3·6H2O was more stable than the complex derived from Fe(NO3)3·9H2O. The quercetin was yellow in color and showed maximum wavelengths (λ􀭫􀭟􀭶) at 250 and 370 nm. The Fe(III)-quercetin complex from Fe(NO3)3·9H2O was yellowish green with 􀟣􀭫􀭟􀭶 at 280 and 420 nm, whereas that from FeCl3·6H2O was dark green with 􀟣􀭫􀭟􀭶 at 280 and 430 nm. The 􀟣􀭫􀭟􀭶 shift indicated that the complex was formed at 3-hydroxychromone site. The Fe(III)- quercetin complex was formed with 1:1 metal-ligand mole ratio based on atomic absorption spectrophotometry analysis and the X-ray diffractogram showed that the crystallinity of the complex was 37%.
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