立地条件主要特征 | 调查区 | 株行距(m) | 林龄 | 害虫 | 病害 | |||||||
叶部 | 枝干部 | 调查株数 | 危害株数 | 危害率 | ||||||||
调查 株数 | 危害 株数 | 危害率 | 调查株数 | 危害株数 | 危害率 | |||||||
PH值7.0, 沙壤土 | A | 2 × 6 | 5 | 60 | 58 | 96.7% | 60 | 2 | 3.33% | 60 | 1 | 1.67% |
PH值6.5, 棕壤土 | B | 2 × 6 | 5 | 60 | 60 | 100% | 60 | 3 | 5.01% | 60 | 2 | 3.3% |
PH值7.5, 沙壤土 | C | 2 × 6 | 5 | 60 | 60 | 100% | 60 | 1 | 1.67% | 60 | 2 | 3.3% |
PH值6.8, 棕壤土 | D | 2 × 6 | 6 | 60 | 60 | 100% | 60 | 6 | 10% | 60 | 2 | 3.3% |
PH值7.0 沙壤土 | E | 2 × 6 | 7 | 60 | 57 | 95% | 60 | 7 | 11.7% | 60 | 5 | 8.3% |
PH值6.5, 棕壤土 | F | 2 × 6 | 8 | 60 | 60 | 100% | 60 | 9 | 15% | 60 | 8 | 13.3% |