Novri Y. Kandowangko
- Sains
Lake Limboto now be categorized as critical lake called the Sea are broad and deep decline. In 1932, the area of Lake Limboto of 7,000 hectares and a depth of 30 m, in 1962, was reduced to 4,250 ha breadth and depth of the lake is 10 m. In 2012, the area of the lake is estimated to be only 3,000 ha and depth of about 2 m. The thickness of the sediment/sludge in Lake Limboto estimated 3-5 m in the east, from 5.8 to 6.4 m along the north-west, from 8.8 to 10.2 m along the south side and 12.4 m in the middle of the lake. One effort to reduce the thickness of the sediments of Lake Limboto (Sedalim) is to dredge the sediment back into the media and use it to grow plants. However Sedalim, besides containing many nutrients carried by water runoff that comes from agricultural land, also contain toxic substances derived from household waste and small industry located around Lake Limboto. This study aims to determine the effect of arbuscular mycorrhiza on the growth of corn plants (Zea mays L.) grown on media which inoculated arbuscular mycorrhizal Sedalim. Research carried out by using the experimental method Design Group Random Design (RAK) consisted of 4 treatments were 0, 3.75, 7.5, 11.25 g/LT arbuscular mycorrhizal inoculants, with four replications. Analysis of data using analysis of variance and analysis of plant growth such as the rate of plant growth (CGR) and Net assimilation rate (NAR). The results showed that administration of arbuscular mycorrhizal inoculant effect on the growth of corn plants grown on media Sedalim. It looks at indicators such as plant growth and NAR values CGR corn crop. NAR value increased in line with increasing doses of arbuscular mycorrhizal given, while the average value decreased from age CGR plants 20-30 days after planting. Keywords: arbuscular mycorrhiza, corn, sludge, CGR, NAR
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