The invention provides organic
compost, which comprises 10-50 parts by weight of
organic matter, 5-20 parts by weight of
humic acid, 0.5-2.0 parts by weight of full
nitrogen, 1.0-2.0 parts by weight of full
potassium and 0.1-0.5 parts by weight of full
phosphorus. The organic
compost is prepared by mixing and fermenting heavily-polluted condensate water,
crop straws, various plants or byproducts generated by preparing materials during making papers with
ammonium sulfite method. The whole preparation technology is simple, wherein the heavily-polluted condensate water generated during making the papers and the
crop straws are used for preparing
organic fertilizer, the
organic fertilizer is reused for the growth of crops, and the straws can be used for the paper-making industry, therefore, the technology is a positive cycle for the
sustainable development of the industrial production. The organic
compost can reduce the phenomenon of the hardening of soil, improves the structure of soil grains, effectively promote the roots to grow, obviously increase the amount and the thickness of the roots, stimulate the growing development of the crops, enhance the
stress resistance performance of the corps, and improve the quality of farm produces, etc.