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Impact of foliar diseases in organically grown barley: Influence of fertilization, nutrient content in leaves, varietal disease resistance characteristics and yield potential

机译：叶面疾病对有机大麦的影响：施肥，叶片养分含量，品种抗病性和增产潜力的影响

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Significant increase in severity of powdery mildew,leaf rust and net blotch with increasing N-content in plant leaves 30 days after germination (all years where the relevant diseases were present at a substantial level). This may explain:ud· Most of the environmental main effects (field) on disease.ud· Effect of treatments, i.e., treament 4 resulted in reduced N/increased K content in leaves, which coincided with reduced levels of disease.ududWe observed no clear effect of P, Ca, S, and Zn content in leaves on disease. Micronutrients as Cu, Mo and Mn showed significant effects on powdery mildew in one year but not the other; further interpretation may not be possible due to inter-correlation among the effect of micro-nutrients.ududThe diseases had a significant yield reducing effect, in particular powdery mildew and net blotch, which occurred at highest severities. In addition, net blotch affected root development, resulting in significant shorter roots, whereas powdery mildew did not. The effect of disease on root length was of the same order of magnitude as the factor 'variety', but larger than effects of 'year'. ud
机译：发芽后30天（所有相关疾病均在相当水平存在的所有年份），随着植物叶片中N含量的增加，白粉病，叶锈病和净斑点的严重程度也显着增加。这可以解释： ud·对疾病的大多数环境主要影响（田地）。 ud·处理的效果，即处理4导致叶片中N的减少/钾含量的增加，与疾病水平的降低相吻合。 ud ud我们观察到叶子中的P，Ca，S和Zn含量对疾病没有明显影响。微量元素如铜，钼和锰在一年中对白粉病表现出显着影响，而在另一年则没有。由于微量营养素的作用之间存在相互关系，因此可能无法进一步解释。 ud ud该病具有显着的减产作用，特别是白粉病和净斑病，其严重程度最高。此外，净斑会影响根系发育，导致根系明显缩短，而白粉病则不会。疾病对根长的影响与“品种”的影响数量级相同，但大于“年”的影响。 ud

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