论文部分内容阅读
采用田间试验研究了不同磷肥用量对吉林省东、中、西部不同类型土壤玉米产量的影响。结果表明,施用磷肥可显著提高玉米产量,且随着施磷量的增加呈先增后降的趋势,依据玉米产量(y)和施磷量(x)拟合得出一元二次关系式:其中东部地区为y=-0.2830x2+47.632x+9097.4,R2=0.9509;中部地区为y=-0.1997x2+26.881x+9172.3,R2=0.9573;西部地区为y=-0.2202x2+38.357x+7341.5,R2=0.9549。结合当年玉米价格和肥料投入,得出吉林省东、中、西部最高产量磷肥用量和最佳经济产量磷肥用量分别为84.2 kg/hm2、67.3 kg/hm2、87.1kg/hm2和80.1 kg/hm2、61.6 kg/hm2、81.9 kg/hm2。土壤有效磷含量与最佳经济产量磷肥用量和最高产量磷肥用量存在极显著的负相关。
Field experiments were conducted to study the effects of different P rates on maize yield in different types of soils in the east, middle and west of Jilin Province. The results showed that the application of phosphate fertilizer significantly increased the yield of maize, and then increased firstly and then decreased with the increase of phosphorus application. Based on the fitting of maize yield (y) and phosphorus application rate (x) Among them, the eastern region is y = -0.2830x2 + 47.632x + 9097.4, R2 = 0.9509; the central region is y = -0.1997x2 + 26.881x + 9172.3, R2 = 0.9573; the western region is y = -0.2202x2 + 38.357x + 7341.5 , R2 = 0.9549. Combined with the current corn price and fertilizer inputs, it was concluded that the highest output of phosphate fertilizer and the best economic output of phosphate fertilizer in the east, middle and west of Jilin Province were 84.2 kg / hm2, 67.3 kg / hm2, 87.1 kg / hm2 and 80.1 kg / hm2, 61.6 kg / hm2, 81.9 kg / hm2. There was a significant negative correlation between soil available phosphorus and the optimum economic yield and the highest yield of phosphate fertilizer.