摘要
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.
The percentage of infection and severity of scab showed extremely negative correlation to the content of K,and extremely positive correlation to leaf N:K ratlo in the leaf.When leaf K was more than 1. 21% or leaf N:K ratio was 1.43 to 1.86,the resistance to scab significantly increased.Exchangeable K and nonexchangeable K as well as readily available N:K in the soil have similar correlations to scab,but they only reached significant level.The result suggested that leaf analysis was the preferable method of indicating nutrition and disease resistance in grape.
出处
《福建农业大学学报》
CSCD
1997年第3期323-327,共5页
Journal of Fujian Agricultural University
关键词
葡萄
黑痘病
抗病性
氮
钾
grape
nitrogen
potassium
scab
disease resistance
