氰氨化钙施用对雷竹林土壤病原菌和土壤理化性质的影响

Influence of Calcium Cyanamide Application on the Pathogens and Traits of Lei Bamboo Forest Soil

摘要: 为了控制临安雷竹林土壤病原菌的发生及提高雷笋的产量，采取氰氨化钙600 kg/hm2对雷竹林种植5年以上土壤进行处理对比试验。通过研究雷竹林典型土壤表土(0~20 cm)病原菌、性状的变化，以探明临安雷竹林衰退的可能因素。结果表明，种植5年以上雷竹林表土(0~20 cm)未经氰氨化钙处理，病原菌测定共有18种细菌，土壤酸度最低pH值达到了3.91，表土的有机质和速效磷含量明显提高，速效磷含量最高可达1272.03 mg/kg。与此相反，经氰氨化钙处理之后土壤中未鉴定出细菌，土壤酸度pH值达到了4.98，提高土壤酸度pH值1.07，达到极显著性差异水平(P < 0.05)。

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).