摘要
在我市沿海丘陵旱地三种不同类型土壤上通过“3417”田间肥料试验，并设置S、B、Zn中、微量肥效验证试验，分析施肥效果。建立甘薯产量和施肥利润与N、P、K施用量的数学模型，得出甘薯合理施肥模式。结果表明，甘薯施用NPK肥料均获得一定幅度的增产增值效果，施用S、B肥效果较Zn肥好。获得最高产量的施肥量为154.3-173.6 kg/hm2 N，44.4-75.3 kg/hm2P2O5，193.1-245.3 kg/hm2K2O，N:P2O5:K2O=1:0.26-0.43:1.24-1.41；最佳经济施肥量为140.0-162.0kg/hm2N，40.8-67.0kg/hm2P2O5，199.8-227.3kg/hm2K2O，N:P2O5:K2O=1:0.25-0.41:1.23-1.64。低产田土壤适当增施N肥，P、K比例较低，中高产田土壤P、K比例要高些。
Field experiments were carrid out on three different soil typise in droughty area of coastal hillside with“3417”fertilizer experiment desige ,And instating experement for effect of microelement fertilizer application.The result show that the fertilization of nitrogen ,phosphorus,potassium and other microelement was important to improve yield and profit of sweet-potato.Through mathematical calculation and analysis,To gain the aim yield at 32441.5~41427.1kg/hm2,the optimum programme would be 154.3~173.6kg/hm2 of N,44.4-75.3 kg/hm2 of P2O5,193.1-245.3 kg/hm2 of K2O,the rate of N、P、K at 1:0.26-0.43:1.24-1.41.To gain the aim profit at 15116.6-19454.8Yuan/hm2,the optimum programme would be 140.0-162.0kg/hm2 of N,40.8-67.0 kg/hm2 of P2O5,199.8-227.3 kg/hm2 of K2O,the rate of N、P、K at 1:0.25-0.41:1.23-1.64. The lowe yield soil should use nutroger fertilizer more than midll-hight yield soil.
出处
《福建热作科技》
2004年第1期1-4,共4页
Fujian Science & Technology of Tropical Crops
关键词
沿海丘陵早地
甘薯
施肥模式
droughty area of coastal hillside sweet-potato fetilization pattern
