Nguyễn Văn Sức, Bùi Quang Xuân, Nguyễn Viết Hiệp, Nguyễn Thị Nga
Từ khoá: nấm rễ nội cộng sinh, nấm rễ, Endomycorrhiza, Vesicula asbuscular mycorrhizae, vi sinh vật, đất, bưởi, Đoan Hùng
Endomycorrhiza (Vesicular Arbuscular Mycorrhiza) and microorganism populations in Doan Hung pomelo soil
The spores of Endomycorrhiza appear in almost 32 soil samples taken from Doan Hung district. It’s estimated that average of one gram of soil number of spores is less one size of spores (40-90nm) and size (90-250nm) are more abundant than >250nm spore. Clear and stain root with tryphan blue determined contamination of fungi to root of host tree mainly arbuscules and vesicles. Spore germination ratio is 16%, percentage colonization is 26%. Aerobic microbiological population analyses indicate that total bacteria is higher than fungus, yeast and actinomycetes total. Beneficial microbiological populations (free nitrogen fixing, phosphate solubilization, cellulose decomposition and extracellular polysaccharides excreating) are also found but low number.