水稻纹枯病生境生态位研究

Studies on Habitat Niche of Rice Sheath Blight

水稻同一生育期各生境点之间的生态位功能指数存在差异 ,表现为田块中部 >北侧边线、西侧边线、东侧边线 >南侧边线 >田角。这说明在各生境位点上 ,水稻纹枯病菌对资源的占有和利用效能是不同的。在田中部水稻纹枯病菌对占有和利用最为充分 ,因此 ,水稻纹枯病菌的繁衍也最快 ,对水稻的危害也最大 ,而在田角则相反。水稻田的田角和田块南侧边线生境位点对水稻纹枯病的控制作用最强。

Some indexes of habitat niche of rice sheath blight are measured. Indexes of habitat niche function are different in different habitat at the same growth stages, which shows: center of the field >north side, west side, east side>south side>corner of the field. As a result, the controlling growth of sheath blight in the habitats of the corner and south side of the field is the most powerful.