Hubungan Kualitas Bahan Organik Tanah Dan Laju Respirasi Tanah Dibeberapa Lahan Budidaya
Relationship between Quality of Soil Organic Matter and Soil Respiration rates in some Cultivation fields.
Abstract
Soil organic matter is one indicator that affects the soil fertility. Light fraction of soil organic matter has a faster turnover than the other factions and as a substrate for microorganisms. Activity of microorganisms can be observed through the respiration rate and activity of soil microorganisms can be expressed as the rate of soil respiration. The aims of this study were to determine the relationship between soil organic matter and soil respiration rates in organic and nonorganic paddy fields, cornfields in Situ Gede village, and forest research, Dramaga. This study was calculate the rate of soil respiration and density fractionation of soil samples study sites in Situ Gede village, Bogor. Respiration rate from study site was not significantly different. Light Fraction of soil organic matter was the highest in organic paddy field. Total soil organic matter was the highest in cornfield, that is 35 g/Kg soil sampel. Soil respiration rate and light fraction of soil organic matter in paddy field were 0,38 mg/hour, and 0,36 g/Kg soil sample respectively. Light fraction of soil organic matter and soil bacteria has significantly correlation with soil respiration rate. Bahan organik tanah merupakan salah satu indikator yang mempengaruhi kesuburan tanah. Bahan organik tanah fraksi ringan memiliki pergantian lebih cepat dibandingkan dengan fraksi lainnya dan berperan sebagai substrat bagi mikroorganisme. Aktivitas mikroorganisme dapat diamati melalui laju respirasi dan dapat dinyatakan sebagai laju respirasi tanah. Penelitian ini bertujuan untuk mengetahui hubungan kualitas bahan organik tanah dan laju respirasi tanah di beberapa lahan budidaya yaitu sawah organik, sawah nonorganik, ladang jagung, dan hutan penelitian darmaga. Pada penelitian ini dilakukan perhitungan laju respirasi tanah dan jumlah fraksi-fraksi dari sampel tanah dari setiap lokasi di desa Situ Gede, Bogor. Laju respirasi dari beberapa lokasi penelitian di desa Situ Gede tidak berbeda nyata. Fraksi ringan tertinggi terdapat pada lokasi sawah organik. Lokasi yang mengandung bahan organik tanah tertinggi ditunjukkan oleh lokasi kebun jagung yaitu 35 g/Kg tanah. Tanah yang berasal dari sawah organik mempunyai laju respirasi sebesar 0,38 mg/jam dan jumlah fraksi ringan dalam bahan organik tanah sebanyak 0,36 g/Kg sampel tanah. Bahan organik tanah fraksi ringan dan jumlah bakteri tanah berpengaruh nyata terhadap laju respirasi tanah.
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- UT - Biology [2148]