摘要
在施用等量有机肥、磷肥、钾肥的基础上,研究了不同施氮量对大棚莴苣产量和产值的影响。研究结果表明,氮肥可显著增加保护地莴苣的产量和产值,氮肥施用量(x)与莴苣产量(y)的效应方程为y=-0.202 3 x2+64.119 x+72 533,最大施肥量为207.4 kg/hm2,最大产量为77 612.8 kg/hm2;最佳施肥量为200.2 kg/hm2,最佳产量为77 602.2 kg/hm2。
The effect of nitrogen fertilizer on greenhouse lettuce was studied on the same manure level.The results showed that there was an obvious promotion to the yield and benefit of lettuce by applying nitrogen fertilizer.The equation of fertilization effect was y=-0.202 3x2 ＋ 64.119x ＋72 533,y represented lettuce yield and x represented nitrogen amount.Through computer simulation,the highest output of lettuce could reach 77 612.8 kg·hm-2,and the maximum economic yield was 77 602.2 kg·hm-2.The study suggested that the best suitable amount of nitrogen fertilization was 200.2 kg·hm-2,and the maximum rate of nitrogen fertilization was 207.4 kg·hm-2.
出处
《长江蔬菜》
2011年第8期63-65,共3页
Journal of Changjiang Vegetables
基金
农业部测土配方施肥项目
关键词
大棚莴苣
氮肥
产量
效益
Greenhouse lettuce
Nitrogen fertilize
Yield
Benefit
