结果显示，树龄与苹果树腐烂病的发生直接相关，表现为随着树龄的增加腐烂病危害逐渐加重。

The result shows that there is a close relation between the age of the apple tree and the disease index.

youdao

结果显示，树龄与苹果树腐烂病的发生直接相关，表现为随着树龄的增加腐烂病危害逐渐加重。

The result shows that there is a close relation between the age of the apple tree and the disease index.

youdao