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以晚粳品种丙 96 - 4 2为试材对杭州临平镇条播、撒播和移栽方式下水稻纹枯病拮抗细菌的群体变化及种类进行了研究 ,从水稻不同生育期采集叶片、叶鞘和谷粒样本 810份 ,获得细菌菌株 7193个。结果显示 ,在每种种植方式下 ,稻株上的拮抗细菌数量都是叶鞘中最多 ,谷粒中最少。3种种植方式下水稻纹枯病拮抗细菌的群体数量基本上是随着稻株成熟而逐渐下降 ,在水稻 6个生育期中 ,拮抗细菌出现的高峰因不同种植方式而有所差异。条播稻上拮抗细菌占细菌总量的比率从苗期到蜡熟期维持在 3.6 %～ 4 .8% ,各生育期之间无显著差异 ,但撒播和移栽稻上拮抗细菌所占的比率因不同生育期而有所不同。从 5 39份纹枯病拮抗细菌中鉴定出 8个属的 14个种 ,不同种植方式与水稻纹枯病拮抗细菌的种类无明显差异
Taking the late japonica rice variety “Prop 96-4 2” as test material, the population change and species of antagonistic bacteria against rice sheath blight were studied under the conditions of sowing, sowing and transplanting in Linping, Hangzhou. Leaf, sheath and leaf were collected from different rice growth stages 810 parts of grain samples, obtained 7193 bacterial strains. The results showed that in each planting mode, the number of antagonistic bacteria on rice plants was the largest in leaf sheaths and the least in grains. The population of antagonistic bacteria against rice sheath blight basically decreased with the maturation of rice in three planting modes. The peak of antagonistic bacteria in six growth stages of rice varied with different planting methods. The ratio of antagonistic bacteria to total bacteria in rice was maintained at 3.6% -4.8% from seedling to wax maturity, with no significant difference between the different growth stages, but the ratio of antagonistic bacteria on sowing and transplanting rice Due to different growth periods and different. Fourteen species of 8 genera were identified from 59 sheath blight antagonistic bacteria. There was no significant difference in the types of antagonistic bacteria against rice sheath blight