不同根际促生菌肥复合载体对燕麦产量的影响

以木炭、泥炭、花土、有机肥、菌糠为不同基质载体，利用前期从植物根际分离出的3株溶磷菌和1株联合固氮菌制作PGPR菌肥，并进行田间随机区组试验，研究其对燕麦草产量和籽粒产量的影响。结果表明，除菌肥4以外，其余处理活菌数均符合《微生物肥料》NY227-94质量标准，其中，菌肥1和菌肥2的活菌数最优，适宜作为PGPR菌肥载体；施用不同PGPR菌肥对燕麦的株高、干草产量和籽粒产量具有明显的促进作用，其中，各处理对株高影响不显著，而燕麦草产量的增产效果与作物所处的生育期有关，灌浆期菌肥1的促生效果良好，成熟期菌肥5的促生效果较佳。菌肥1干草产量和籽粒产量较ck分别提高20．4％和10．8％，说明以配方1可作为PGPR菌肥的良好载体。

Effect of different bio-fertilizers on hay yield of oat

Based on different substrates （charcoal, peat, cultivate soil, organic compost, mushroom residue） as carrier material,three phosphate solubilizing bacteria （Bacillus sp. , Pseudomonas sp. and Azotobacter sp. ） strains and one associate fixation bacteria isolated from rhizosphere of alfalfa and wheat were used to produce PGPR inoculants. A randomized block experiments was carried out to determine the effect of different inoculants on hay yield and grain yield of oat. The results showed that except No. 4 inoculants ,the viable bacteria of other treatments accorded with the quality criterion of agricultural microbial fertilizer of China （NY227-94）,and No. 1 inoculants and No. 2 inoculants had higher viable bacteria. The field experiments indicated that PGPR inocu lants had obvious promotion on height,hay yield and grain yield of oat while no significant difference on h Meanwhile,the effect of PGPR inoculants on hay yeild has a s oats. No. 1 inoculants was the best for filling stage while No. lg 5 nificant relation with phenological period eight. of the inoculants was better for mature period. Corn pares to control,the hay yield and grain yield of No. 1 inoculant increased by 20.4% and 10.8% ,respectively. In conclusion,No. 1 inoculant was the best compound carrier formulation to produce PGPR inoculants.