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1.绪论特殊的大量营养或微量营养的影响不仅对植物生长有不同的重要性,而且在植物体对病原菌的抵抗力及克服不利环境因子上都具有不同的重要影响:一种营养的满足——如K,可能有效地增加植物对一种病害的抵抗力,但是却减少了对另一种病害的抵抗力。病源和寄主之间的关系是以化学物质的交换为特征的,所以营养供应的改善不仅对植物有直接影响,而且也影响到树木的生长和抗病性。
1. INTRODUCTION The effects of particular macronutrients or micronutrients are not only of differential importance for plant growth but also have different important effects on the resistance of pathogens to pathogens and overcoming unfavorable environmental factors: a nutritional satisfaction - - K, for example, may effectively increase the plant’s resistance to a disease but reduce its resistance to another. The relationship between the pathogen and the host is characterized by the exchange of chemical substances, so the improvement in nutrient supply not only has a direct impact on the plant but also affects the growth and disease resistance of the tree.