| According to the current situation of rape clubroot in Anhui province, we select the commonly used fertilizer and the effective measures of prevention and treatment of clubroot that have been reported to carry out field experiment for studying the integrated effects of the disease control of sowing time, calcium-boron ratio and potassium fertilizer, and finally to get the influence of the given experimental factors on rape clubroot and the order on its production. At the same time, we have gotten the optimal ratio of solution of the three factors to the prevention and treatment of rape clubroot and the solution of increasing production, the mains results of the research are as follows:The order of influence on the prevention and treatment of rape clubroot of sowing time, calcium-boron ratio and potassium fertilizerThe experiment integrates the disease index of the three factors in the period of disease, by building regression models to analyze, optimize and conduct them with frequency analyses. The result shows that the sowing time (X1) makes the largest contribution to the effects of the disease control, the next is potassium fertilizer (X3) and calcium-boron ratio is relatively low.The order of influence of sowing time, calcium-boron ratio and potassium fertilizer on increasing rapeseed productionThe experiment integrates the sudbistrict of the three factors in the period of rape harvest, by building regression models to analyze, optimize and conduct them with frequency analyses. The result shows that in the three factors, the sowing time (X1) makes the largest contribution to the production of sudbistrict, the next is potassium fertilizer (X3) and calcium-boron ratio is relatively low.The optimal ratio of solution to the prevention and treatment of rape clubroot ofsowing time, calcium-boron ratio and potassium fertilizerThe experiment integrates the disease index of the three factors in the period of disease, by building regression models to analyze, optimize and conduct them with frequency analyses. The result shows that the best combination of the effects of the disease control is:sowing time=Oct.10th or Oct.11th, boron-calcium ratio (Ca(OH)2/borax)=26.85 and potassium fertilizer (KCl)=8.37g/m2.sowing time, calcium-boron ratio and potassium fertilizerThe experiment integrates the sudbistrict of the three factors in the period of rape harvest, by building regression models to analyze, optimize and conduct them with frequency analyses. The result shows that the best combination to increase production is:sowing time= Oct.9th or Oct.10th, boron-calcium ratio (Ca(OH)2/borax)=81 and potassium fertilizer (kCl)=16.3g/m2. |
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