杂选1号油菜N、P、K施用量与产量的数学模型研究 Ⅱ.中等肥力水平的施肥数学模型建立与施肥决策  

A Mathematical Model for the Relationship between Amounts of N, P, K Application and Yield of Rape Variety Zaxuan 1 Ⅱ. Mathematical model and strategy of fertilizer application under middle-fertility level

作　　者：高雪[1] 苟红英[1] 

机构地区：[1]贵州省农业厅土壤肥料工作总站,贵阳550001

出　　处：《贵州农业科学》2004年第3期38-40,共3页Guizhou Agricultural Sciences

摘　　要：通过杂选 1号油菜不同肥力条件下施用氮、磷、钾肥与产量的关系效应研究 ,获得杂选 1号油菜在中等肥力条件下产量与N、P、K三因素的回归数学模型。对模型的分析得出 :最高产量施肥量N 10 .0 7kg/6 6 7m2 ,P2 O57.6 78kg/6 6 7m2 ,K2 O10 .35 3kg/6 6 7m2 ;最适施肥量为N 8.6 5 4kg/6 6 7m2 ,P2 O56 .2 82kg/6 6 7m2 ,K2 O 6 .4 5kg/6 6 7m2 ,并获得了杂选 1号高产 15 0kg以上的优化施肥技术方案。同田对比试验结果 ,平均产量达 175 .6 8kg/6 6 7m2 ,比农户习惯施肥平均增产 30 .19kg/6 6 7m2 ,增产 2 0 .75 %。Field experiments were conducted to study the regression equation of amount of applying N, P, K and rapeseed yield in different fertility soil. The results showed that according to regression equation, the highest yield of Zaxuan 1 got from the amount of N 151kg/ha, P_2O_5 115.2kg/ha and K_(2)O 155.3kg/ha and the most economical amount of N, P_(2)O_(5), K_(2)O was 129.8kg/ha, 94.2kg/ha, 96.8kg/ha for the maximum yield of Zaxuan 1. A scheme of fertilizer application for high yield (above) 2250 kg/ha of rapeseeds was put forward. The demonstration trial illustrated that the rapeseed yield of optimum fertilizer application reached 2635.2kg/ha, increased by 20.75% than yield of farmers’ practice.

关 键 词：杂选1号 油菜 N P K 施肥量 产量 数学模型 品种 

分 类 号：S565.406.2[农业科学—作物学] S114