不同配方水溶肥对结球生菜产量及品质的影响

根据生菜生长规律,选择3个追肥配方,探究了不同追肥配方对生菜产量、品质和经济效益的影响。结果表明:3个试验点产量平均值T2处理最高,生物产量和经济产量分别为69.2、49.7 t/hm^2,其经济系数也最高,达到0.72。T2与T1、T3相比,可溶性糖含量分别增加0.4、0.1个百分点,硝酸盐含量分别降低4.0%、4.8%。T2平均氮肥偏生产力和磷肥偏生产力值均最大,分别比T1和T3增加7%、5%;因此,综合生菜产量、品质、肥料生产力等,京郊地区生菜推荐追施水溶肥配方为22-8-22。

Effects of Different Water-soluble Fertilizers on Yield and Quality of Lettuce

Abstract: According to the growth law of lettuce, three formulas of top dressing were selected to explore the effect of different formulas on the yield, quality and economic benefit of lettuce. The results showed that the average yield of T2 treatment was the highest in three test sites, and the biological yield and economic yield reached 69.2, 49.7 t/hm2, respectively. The economic coefficient of T2 was the highest, reaching 0.72. Compared with T1 and T3, T2 increased soluble sugar content by 0.4 and 0.1 percentage point, and decreased nitrate content by 4.0% and 4.8%, respectively. The average nitrogen partial factor productivity and phosphate fertilizer partial productivity of T2 were the highest, which were 7% and 5% higher than that of T1 and T3, respectively. Therefore, considering the yield, quality and fertilizer productivity of lettuce, the recommended formula of top dressing water-soluble fertilizer was 22-8-22.