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3. siklus nitrogen<br />
4. siklus sulfur<br />
5<br />
Siklus ini berfungsi untuk mencegah suatu bentuk materi menumpuk<br />
pada suatu tempat. Kegiatan manusia telah membuat suatu sistem yang<br />
awalnya siklik menjadi nonsiklik, kegiatan pembangunan yang dilakukan<br />
oleh manusia cenderung mengganggu keseimbangan lingkungan alam.<br />
1.<br />
3.<br />
5.<br />
7.<br />
9.<br />
Diagram of Environments and N2 Fixing Components in a rice field Ecosystem<br />
N2 fixing bacteria.<br />
Asscoiated with the roots<br />
2.<br />
Epiphytic on Rice 4.<br />
at soil-water interface 6.<br />
at air water interface 8.<br />
epiphytic on weeds 10<br />
In the Soil<br />
Epiphytic on weeds. Blue-gree algae<br />
free floating<br />
epihytic on rice<br />
Azolla<br />
Komponen ekosistem sawah (Sumber:<br />
http://www.microbiologyprocedure.com/rhizosphere-phyllosphere/nitrogenfixation-in-the-rhizosphere.html)<br />
In low land flooded rice cultivation, two major subenvironments have come to<br />
be recognized-submerged plant parts and the rhizosphere. Epiphytic bacteria
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