施用生物菌肥对饲用玉米生长和土壤微生物数量的影响

对饲用玉米进行随机区组试验,测定了生物菌肥对玉米生长指标(株高、干鲜比和地上生物量)、土壤有效养分(有效氮、有效磷和有效钾)以及土壤微生物(细菌、真菌和放线菌)的影响。结果表明,施用生物菌肥对玉米生长有着促进作用,玉米株高和地上植物量较对照分别提高6.3%和10.1%,且与对照差异显著(P0.05);土壤有效氮、有效磷和有效钾显著增加(P0.05),分别较对照增加7.7%,27.9%和7.5%,其中,有效磷增加明显;土壤细菌和放线菌数量显著增加(P0.05),分别较对照增加322.0%和101.6%,而真菌的数量显著低于对照(P0.05),与对照相比,施用生物菌肥后,土壤真菌数量减少了67.9%。

Effects of using biofertilizer on forage maize growth and soil microbial number

By randomized block design of experiment tested on the forage maize,the paper determined the biofertilizer's effects on the growth index (plant height,dry-fresh ratio and aboveground biomass),available soil nutrention (available nitrogen,available phosphorus and available potassium)and soil microorganism(bacteria, fungi and actinomycetes).The results showed that using the biofertilizer have promoted forage maize's growth, which increased the plant height (6.3%)and aboveground biomass (10.1%)compared with the contorl (P <0.05).There were a significant difference (P <0.05)on the available nitrogen,available phosphorus and availa-ble potassium in the soil,which increased,7.7%,27.9% and 7.5% respectively compared with the control.A-mong them,the increase of available phosphorus was obvious.The edaphic bacteria and actinomycetes observ-ably increased compared to the control (P <0.05),which respectively improved 322.0% and 101.6%.But,the quantity of fungi was lower than that of the contrast (P <0.05),which reduced about 67.9% after using the biofertilizer.