摘要
本试验以燕麦与箭筈豌豆不同种植模式的根际土壤为对象,对其土壤微生物数量进行了初步研究。结果表明,根际土壤细菌、真菌和放线菌数量在燕麦拔节孕穗期较低,开花期较高,随着生育进程的推进至成熟收获期数量呈逐渐减少的趋势。在不同生育期,间混作处理比单作燕麦显著提高了根际土壤细菌数量(P<0.05)。收获期土壤微生物以细菌占绝大多数,其中间作混播根际土壤细菌数量是单作燕麦的1.1倍左右,单作箭筈碗豆是单作燕麦根际土壤细菌数量的1.3倍;土壤微生物总数量以燕麦与箭筈豌豆间作(1∶2)和燕麦与箭筈豌豆混播(1∶2)处理较高,单作燕麦最少。说明间作混播种植方式能起到提高根际土壤微生物数量的作用。
The population of rhizosphere microorganisms under oat（Avena sativa） and common vetch（Vicia sativa） was studied in different planting modes.The populations of rhizosphere bacteria,fungi and actinomycetes increased under oat through the jointing stage to the flowering stage then gradually decreased with oat growth.The population of rhizosphere bacteria under oat mixed with common vetch was significantly greater than that under oat monoculture（P〈0.05） at different growth stages of oat.At harvest,the populations of rhizosphere bacteria under different treatments were dominant.The population of rhizosphere bacteria under the mixture of oat and common vetch was 1.1 times more than that under oat monoculture.Compared with that under oat monoculture,the population of rhizosphere bacteria under common vetch monoculture was 1.3 times higher.In mixtures,an intercropping ratio of oat and common vetch of 1∶2 had the greatest populations of rhizosphere microorganisms,whereas oat monoculture had the least.The mixture of oat and common vetch was beneficial for increasing the populations of rhizosphere microorganisms.
出处
《草业学报》
CSCD
北大核心
2009年第6期151-157,共7页
Acta Prataculturae Sinica
基金
国家自然科学基金项目(30871491)
国家"十一五"科技支撑计划(2007BAD89B01)
国家"十一五"科技支撑计划(2006BAD15B02)资助
关键词
混作
燕麦
箭筈豌豆
根际微生物
数量
mixture
oat（Avena sativa）
common vetch（Vicia sativa）
rhizosphere microorganism
population
