بررسي تاثير مقادير مختلف سرخس عقابي بر كيفيت كمپوست شدن خاك اره گونه اورامريكان

The effect of amounts of brake fern on quality of composting of sawdust of Populus euramericana

Nowadays,an existing problem in wood industry is how wastes such as sawdust can be used again.One of the solutions going with this is composting Them. In this study it has been tried to consider and evaluate the quality of composting sawdust by adding some material such as brake fern.This study was done randomly in factorial plan, the factors were included sawdust of Populus euramericana and brake fern (in 3 levels), all repeated 4 times; Moreover; 4 cases were considered as control so they were totally 16. In this experiment, the pots were used because we wanted to omit the other environmental factors, the selected pots were sort of size 7 with 4 liter. After preparing 12 pots with sawdust, the provided amounts of brake fern randomly was allocated to the pots. Related to some amount of brake fern. We did so, just because the content of each pot is 4 liter therefore. For 25%, 50% and 75% of the pots content, i.e. 1, 2, 3, liter respectively of brake fern were provided added by sawdust. After that, the pots were irrigated. Water added in samples up to some extent that they were not damped. The content of the pots were admixed with trowel that the air condition was done greatly.This work was repeated once a week. The pots were covered by plastic form while by creating the greenhouse condition, so we prevented the loss of energy, After 2 months the factors of N% the organic carbonate percentage. C/N, B% K% pH, EC & Bulk density were tested and measured on provided composts. The results were shown that about N%, C/N, K% & P%, the mixture sawdust of Populus euramericana with brake fern 75% were included the best results. Adding the brake fern caused no significant difference among the compost samples. All the results of EC showed that the plants have no problems to grow. As to bulk density the gained results that they stand in universal range.