تأثیر کودهای آلی بر ویژگی‌های رشد گندم در سطوح مختلف فشردگی خاک

Soil compaction is one of the most prevailed limitations for crop growth and yield. The use of organic matter as fertilizer on agricultural soils can reduce the effects of soil compaction. In addition, it provides the nutrients needs by the plants. So, a factorial experiment was carried out in randomized complete blocks design with three replications. The first factor was the source and the amount of the organic fertilizer (manure, sewage sludge compost and municipal solid waste compost) and each of organic fertilizer was used at three levels of 0, 15, 30 g/kg soil. The second factor was two levels of soil compaction (1.2 and 1.7 g cm-3)g. The results showed that the addition of all three types of organic fertilizers at both levels of compaction caused increased plant height, spike length, number of grains per spike and grain weight. The maximum amount of these features was achieved by using 30 grams of organic fertilizers per kg of soil. Using organic fertilizers and increasing their amounts, reduced the effects of soil compaction on wheat growth characteristics. It was found that application of 30 g of organic fertilizers per kg soil can be recommended at compacted and non-compacted conditions.