摘要
目的以未栽培白花蛇舌草、栽培一茬白花蛇舌草和栽培二茬白花蛇舌草大田土壤为研究对象,分析白花蛇舌草的连作对土壤养分和微生物数量的影响。方法用营养琼脂培养基、孟加拉红琼脂培养基和高氏一号琼脂培养基分别测定土壤中细菌、真菌、放线菌的数量。结果白花蛇舌草种植后土壤酸度增强;有机质含量无显著变化;土壤中微生物总数增加,其中白花蛇舌草根际处的增加更为明显,表现出根际效应;连作导致土壤中细菌、放线菌数量减少,真菌数量增加。结论白花蛇舌草连作对土壤养分含量无显著影响,但对土壤酸度和微生物群落结构有较显著影响。
OBJECTIVE With soils from the field which has been planted no hedyotis diffusa, planted hedyotis diffusa once and planted hedyotis diffusa twice as the objects of study, this paper aims to analyze the effects of hedyotis diffusa continuous copping on the soil nutrient and the number of edaphon. METHODS The number of bacteria, fungi and actinomycetes in soils were assayed with nutrient agar medium, rose Bengal agar medium and Gause＇s agar medium respectively. RESULTS The planting of Hedyotis diffusa increased the number of edaphon in soil, especially in rhizosphere, and showed rhizosphere effect. However, continuous cropping of Hedyotis diffusa decreased the number of bacteria and aetinomyeetes in soil, while increased the number of fungi. CONCLUSION Hedyotis diffusa continuous cropping affects the balance of microbial community structure in soil.
出处
《南京中医药大学学报》
CAS
CSCD
北大核心
2013年第2期179-181,共3页
Journal of Nanjing University of Traditional Chinese Medicine
基金
江苏省自然科学基金(BK2010564)
关键词
白花蛇舌草
连作
土壤微生物
Hedyotis diffusa
continuous cropping
edaphon
