不同肥料及用量对苜蓿白粉病的影响

Effect of Various Fertilizers and Different Application Levels on the Disease of Alfalfa Powdery Mildew

在大田条件下研究了9个紫花苜蓿品种施用撒可富复合肥、过磷酸钙和根瘤菌对白粉病抗病性的影响,以病情指数和发病率为指标统计发病情况。结果表明,施用撒可富肥料,苜蓿白粉病的发病最轻,各品种的病情指数和发病率均比施用过磷酸钙和根瘤菌低;撒可富肥不同用量处理下,按75kg/hm2量施用各品种的病情指数和发病率显著低于45kg/hm2和105kg/hm2施用量的病情指数和发病率。因此,按75kg/hm2量施用撒可富复合肥可以有效减轻苜蓿白粉病的发生。

The effect of fertilizer on the incidence and disease index of alfalfa powdery mildew was studied in the field.There were three kinds of fertilizer that were Sakerful(N∶ P∶K∶ S=15∶15∶15∶18),superphosphate and rhizobium.The results showed that the incidence and the disease index of alfalfa powdery mildew with Sakerful were lower than others.The Sakerful in different application levels effected significantly on the degree of this disease occurrence.The incidence and the disease index of alfalfa powdery mildew applying 75kg/hm^2 were lower than those applying 45kg/hm^2 and 105kg/hm^2.