吉林省不同类型土壤玉米施肥效应研究

吉林省东、中、西不同类型土壤田间试验结果表明:不同类型土壤的氮、磷、钾肥施用模式符合二次曲线Y=ax²+bx+c。利用该模式,结合肥料和玉米价格进行综合分析,明确了不同类型土壤上的氮、磷、钾施用效益,即东部冲积土玉米最佳施肥量为N192kg/hm²、P2O556kg/hm²、K₂O33kg/hm²;中部黑土玉米最佳施肥量为N133kg/hm²、P₂O₅38kg/hm²、K₂O47kg/hm²;西部淡黑钙土玉米最佳施肥量为N59kg/hm²、P₂O₅65kg/hm²、K₂O51kg/hm²。

Response to Fertilization of Maize on the Different Types of Soil in Jilin Province

Field experiment conducted on the different types of soil in the east, middle and west parts of Jilin province showed that the N, P and K application mode could be expessed by the quadratic equation Y=ax²+bx+c, and through this mode by the maize and fertilizer price, we made sure that the optimum fertilizer rates on the alluvium soil of the east part of Jilin province was N 192 kg/ha, P₂O₅ 56 kg/ha and K₂O 33 kg/ha respectively, and the optimum fertilizer rates on the black soil of the middle part of Jilin province was N 133 kg/ha, P₂O₅ 38 kg/ha and K₂O 47 kg/ha respectively, the optimum fertilizer rates on the light chemozem soil of the west part of Jilin province was N 59 kg/ha, P₂O₅ 65 kg/ha and K₂O 51 kg/ha respectively.