果园植被对芒果炭疽病生态位的影响

Effect of vegetation on niche of mango anthracnose

通过果园植被对芒果炭疽病的时间、空间、营养生态位的影响研究,结果表明,常规管理区和生草区芒果炭疽病的时间生态位宽度指数平均值分别为0.1763和0.2350,空间生态位宽度指数平均值分别为0.8557、0.9483,营养生态位宽度指数分别为0.8741、0.7716。说明杂草能扩张芒果炭疽病的时空生态位宽度,但却压缩了营养生态位宽度,对生草植被进行合理化管理可能在一定程度上影响芒果炭疽病菌的生存与繁衍,降低危害水平。

The effect of vegetation on temporal ,spatial ,nutritional niche of mango anthracnose was studied in this paper by niche theol. The result show： Average indexes of temporal niche breadth of mango anthracnose were 0.1763 and 0.2350 in the managing orchard and in herbiferous orchard,while Average Indexes of spatial niche breadth of mango anthracnose were 0.8557 and 0.9483 .Indexes of nutritional niche breadth of mango anthracnose were 0.8741 and 0.7716 in the managing orchard and in herbiferous orchard. The results suggested weed could distend temporal and spatial niche breadth of mango anthracnose, but cut down the nutritional niche breadth of mango anthracnose because of weed offering more niche to mango anthracnose possibly. To mange weed reasonably may affect mango anthraenose and reduce degree of harm.