Abstract:
The comparative experiment was carried out by the application of calcium cyanamide in the amount of 600 kg/hm2 to the soil where the Lei bamboo plantation had been more than 5 years so as to control the soil pathogens and improve the yield of bamboo shoot in Ling’an Lei bamboo forestry. To verify the main factors affecting the recession of Ling’an Lei bamboo forestry, investigation on the changes of soil traits and soil pathogens in the typical surface soil (0 - 20 cm) of Lei bamboo forestry was carried out in the present study. The results showed that 18 types of pathogenic bacteria were detected; the soil acidity was decreased dramatically, the lowest soil pH value reached 3.91; organic matter and available phosphorus content of soil increased significantly, the highest available phosphorus content reached 1272.03 mg/kg in the typical surface soil (0 - 20 cm) of Lei bamboo plantation more than five years without calcium cyanamide treatment. In contrast, in the soil with the supply of calcium cyanamide, no pathogenic bacteria was identified; soil acidity pH value reached 4.98, pH value increased by 1.07, showed statistical significant difference (P < 0.05).