Effects of Tobacco Straw Bio-organic Fertilizer on Exchangeable Bases of Tobacco Soil

For the conservation and restoration of tobacco planting soil, the sustainable development of tobacco growing areas, and to determine the application rates of tobacco straw bio-organic fertilizer, a field experiment was conducted to study the effects of tobacco straw bio-organic fertilizer on tobacco soil exchangeable bases. The resulted showed that different amount of tobacco straw bio-organic fertilizer had a significant impact on tobacco soil exchangeable bases and physical properties, with 1500 kg/hm² tobacco straw bio-organic fertilizer having the best effect on conservation and restoration of tobacco planting soil, 3000 kg/hm² tobacco straw bio-organic fertilizer having the best effect on soil structure improvement. Therefore, the appropriate amount of fertilizer should be determined based on the actual soil conditions.Application of1500 kg/hm² tobacco straw bio-organic fertilizer is appropriate on general condition tobacco soils whileapplication of 3000 kg/hm² tobacco straw bio-organic fertilizer would be god for heavy clay soils.