Corn Fertilizer and Establishment of Fertilization Index System in Weining County,Guizhou Province

In order to increase the income of farmers and agricultural production and also improve the quality of agricultural products,corn fertilizer tests were performed,and the fertilization index system of Weining County,Guizhou Province was established.The nitrogen rate of plots with different fertility was as follows:nitrogen 10.77～20.19 kg/667m2,P2O5 2.48～9.43 kg/667m2,K2O 6.90～21.70 kg/667m2.In accordance with the test results of soil samples,the total amount of fertilizer was follows:organic fertilizer 1 000 kg/667m2,pure nitrogen 16～18 kg/667m2,P2O5 3.5～4.5 kg/667m2,K2O 12～13 kg/667m2.A fertilization index system was established in Weining County.①Fertilizer:organic fertilizer 1 000 kg/667m2,pure nitrogen 10.77～20.19 kg/667m2,P2O5 2.48～9.43 kg/667m2,K2O 6.90～ 21.70 kg/667m2.②Fertilizer varieties:fertilizer or compound fertilizer was prior to be used,and organic fertilizer was paid attention.③ Fertilization time and proportion:basic fertilizer was composed of 100 % organic fertilizer,100 % phosphate fertilizer,40 % nitrogen fertilizer,and 60 % potash fertilizer.Seedling fertilizer was 30 % nitrogen fertilizer.Granular fertilizer was 40 % potash fertilizer.④ Fertilization method:the basal fertilizer should be deeply applied and covered soil.The topdressing should be applied by placement or spraying.