为确定铜在小麦、大麦和燕麦茎黑变病中的作用,作者在加拿大Lacombe 进行了田间试验。供试土壤为黑钙砂壤上,含铜量为0.2ppm。播种前在土表施用铜螯合物和氮、磷、钾。试验结果表明:没施用铜的小麦植株感病,产量低,表现出典型的缺素症状—叶尖枯死。植株不健壮.成熟延迟,籽粒发育不全或皱缩,穗弯曲。每英亩施用 To determine the role of copper in melanosis in wheat, barley and oat stems, the authors conducted a field trial in Lacombe, Canada. The test soil for the black sand, copper content of 0.2ppm. Copper sequestration and nitrogen, phosphorus and potassium were applied to the soil before sowing. The results showed that the copper-free wheat plants were susceptible to low yield and showed typical deficiency symptoms - withered leaves. Plants are not robust. Delayed maturation, hypoplasia or shrinkage, spike of the ear. Apply per acre