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葡萄黑痘病的感病率和严重度与叶片全 K 量呈极显著负相关.与叶片 N:K 比值呈极显著正相关.叶片全 K 量大于1.21%或 N:K 比值为1.43～1.86.葡萄黑痘病抗病性明显增强.土壤速效 K 和缓效 K 以及速效 N:K 比也有类似相关性,但只达到显著水平.可见,叶片分析更能表达葡萄的营养状况和抗病性.
There was a significant negative correlation between the susceptibility and the severity of V. acnes and the total K content of leaves, and a significant positive correlation with the ratio of N: K. The total K content of the leaves was more than 1.21% or the N: K ratio was 1.43-1.86 The disease resistance of V. acnes was significantly enhanced.The soil available K and slow K and available N: K ratio also had similar correlation, but only reached the significant level.It can be seen that leaf analysis could better express the nutritional status and disease resistance of grape.