论文部分内容阅读
通过在贵州喀斯特地区测定15个试点135个油菜田块的土壤指标,发现土壤8种指标在各试点和不同田块存在显著或极显著差异。土壤全钙与交换钙含量之间达极显著相关,土壤全钙与交换镁含量相关性较大,土壤交换钙与交换镁含量间也达极显著相关。同时,调查各试点各田块油菜不同生育期菌核病病情,发现土壤因素对油菜各生育时期菌核病发生有显著影响。土壤全钙含量和p H对于初花期油菜叶部发病率和盛花期茎部发病率、病情指数的发生起主要作用,土壤有效磷和碱解氮对盛花期叶部发病率起主要作用,土壤p H对终花期茎部发病率和病情指数起主要作用;土壤中高含量有效磷和速效钾是促进成熟期茎部菌核病发病率和病情指数的主要因素。
By measuring the soil parameters of 135 plots in 135 plots in the karst area of Guizhou Province, it was found that there were significant or extremely significant differences among the 8 indexes in the plots and in different fields. Soil total calcium and exchangeable calcium reached a very significant correlation between the soil total calcium and exchange magnesium content is relatively large, soil exchangeable calcium and exchange magnesium content also reached a significant correlation between. At the same time, we investigated the disease status of sclerotinia in different growth stages of rape in each pilot field and found that soil factors had a significant impact on the occurrence of sclerotinia in each stage of rape. Soil total calcium content and p H played a major role in the incidence of leaf at early flowering stage and on the incidence of stems at full flowering stage and disease index. The contents of soil available phosphorus and alkaline hydrolysis nitrogen played a major role in the incidence of full-flowering leaves, p H played a major role in the incidence and disease index of culm at the final flowering stage. High available phosphorus and available potassium in soil were the main factors to promote the morbidity and disease index of sclerotialis in mature stage.