摘要
采用“3414”最优回归设计方法,对蕹菜高优栽培氮磷钾肥料合理配施技术进行研究。结果表明,本试验条件下当N 223.6、P2O550.0和K2O 97.5 kg/hm2,三要素比例为1∶0.224∶0.436时,蕹菜最高经济产量达31391.4 kg/hm2;当N 215.7、P2O546.4和K2O 90.0 kg/hm2,三要素比例为1∶0.215∶0.417时,蕹菜最佳施肥利润为36211.8元/hm2,经济产量亦达31360.1 kg/hm2。在同等肥力下,蕹菜硝酸盐含量与施氮水平呈显著正相关;与施磷、钾水平呈极显著负相关。
The effect functions of NPK application on economical yield, fertilization profit of water spinach （ Ipomoca aquatica Forsk） were studied by the field experiments with 3414 best regression design. The results showed that the best NPK application of water spinach with maximum economical yield of 31392.4 kg/hm^2 was N 223.6, P2O5 50.0 and K2O 97.5 kg/hm^2, the best NPK application with the best fertilization profit of 36211.8 yuan/hm^2 and higher economical yield of 31360.1 kg/hm^2 was N 215.7, P2O5 46.4 and K2O 90.0 kg/hm^2. Under equal fertilizer, there was significant positive correlation between different N levels and nitrate content; There was significant negative correlation between different P, K levels and nitrate content.
出处
《中国土壤与肥料》
CAS
CSCD
北大核心
2006年第4期32-34,共3页
Soil and Fertilizer Sciences in China
关键词
蕹菜
平衡施肥
效应函数
硝酸盐
water spinach
equilibrium fertilization
effect function
nitrate accumulation
