本文采用生长速率法测定了五种杀菌剂对葡萄黑痘病菌(Sphaceloma ampelinum de Bary)的室内生物活性。结果表明:12.5%腈菌唑EC,32.5%烯唑醇WP的EC50分别为0.0507微升/升、0.0839微升/升;20%银果WP和20%银泰EC的EC50分别为34.1597微升/升、62.1856微升/升。均高于50%多菌灵WP的生物活性。根据"按比例混合法"复配银泰和腈菌唑,结果表明:银泰和腈菌唑按5∶1比例复配有明显增效作用,其共毒系数大于200。按1∶1,1∶2比例复配略有增效作用,其共毒系数大于125。
[Objective]The aim was to reveal the spatial distribution characteristics of total nutrients in soil and provide a theoretical basis for farmland management and improvement of crop yield. [Method]GIS technique was used to analyze the spatial distribution characteristics of total C,total N,total P and total K for different soil layers in Liaoning Province. [Result]The results showed that the content of total C,total N,total P decrease from east to west,but the content of total K was high in north district of Liaoning Province. The content of total C,total N,total P and total K was higher in soil surface （0-20 cm） than the lower （20-40 cm）. Total K varied less with soil depth,and its mean content was respectively 17.64 g/kg and 17.08 g/kg for soil surface and soil lower layer. [Conclusion]The results of the distribution of soil total nutrients in different soil layers supplied a theory basis for farmland management.
