摘要
选用湖北棉区土壤中分离筛选出的Glomus mosseae等四个菌种,接种于用砂土混合基质盆栽棉花上。试验结果表明,不同菌种对棉花的感染速率,具根表菌丝根段百分数和根表菌丝密度,在接种后30天有显著差异,至接种后60天则渐趋一致;不同菌种所形成孢子的总数大小顺序为G.albidum var.Qianjiang>G.intraradices>G.hoi>G.mosseae.前两个菌种的孢子分布以10cm以下土层居多,后两个菌种在0—10cm土层和10cm以下土层的孢子数几乎相近。接菌棉花的生长及磷吸收明显优于对照,但不同菌株间,除在棉花生长的初期阶段有明显差异外,嗣后则渐趋一致。
Four species of Vesicular-Arbuscular mycorrhiza fungi, Glomus mosseae (Nicol. and Gerd. ) Gerd.and Trappe, G.hoi Berch and Trappe, G. albidum var. Qianjiang ( Walker and Rhodes ) Wang P. and Z. M. Q., G.intraradices Schenck and Smith, isolated from cotton rhizosphere soils, were selected to compare their effects on cotton ( Gossypium hirsutum L. ) in pot experiment. Thirty days after inoculating with VAM fungi, there were significant differences(p<0.05 ) in infection rate and hyphae density on root surface among the four species. The differences diminished by sixty days after inoculating.The total amo unt of spores produced by the four species, was ordered as G.albidum, G.intraradices,G. mosseae. Most of spores formed by the former two species distributed at 10 cm below soil surface.The spores formed by the latter two species were distributed equally in O-10cm and 10cm below soil surface. The growth and phosphorus uptake rates of cotton inoculated with VAM fungi were significantly higher than control ( p<0.01 ) , but there were no signifi cant difference among plants inoculated with different species of VAM fungi, except the initial stage of cotton growth
出处
《华中农业大学学报》
CAS
CSCD
北大核心
1989年第2期125-131,共7页
Journal of Huazhong Agricultural University
基金
国家自然科学基金
关键词
棉花
VA菌根
有效性
磷素吸收
cotton
VA mycorrhiza
efficiency
phosphorus uptake
