施肥量对醋糟基质栽培生菜的影响

研究了5种施肥量处理正常施肥量的0 (0 s)、1/8 (1/8 s)、1/4 (1/4 s)、1/2( 1/2 s)和1(1 s)单位]对醋糟混合基质栽培生菜生长以及品质的影响.结果表明,1/4单位施肥量(1/4 s)处理下醋糟基质的pH和EC值变化较其他处理平稳.1/4单位施肥量(1/4 s)处理下生菜茎粗、产量、根鲜重、叶鲜重最大,而1个单位施肥量(1 s)处理下上述指标最小.对采收时生菜品质的分析表明,生菜叶片内的硝酸盐含量随着施肥量的增加而迅速上升,1个单位施肥量(1 s)处理下生菜叶片中硝酸盐和可溶性蛋白含量最高,1/4单位施肥量(1/4s)处理下生菜叶片中可溶性糖含量最高.综合考虑产量和品质,采用1/4单位的配方(1/4 s)是适合醋糟基质栽培生菜的施肥配方.

Effect of different fertilization amount on lettuce grown with vinegar residue substrate

Effects of five different fertilizer amount treatments(0,1/8,1/4,1/2,1 units of normal fertilizer concentration)on the growth and quality of lettuce grown with vinegar residue substrate mixed with others were investigated.The results showed that the 1/4 unit fertilizer amount treatment had smaller change range of pH and EC in the vinegar residue substrate than other treatments.At the same time,stem diameter,yield,root fresh weight,leaf fresh weight were the biggest in the 1/4 unit fertilizer amount treatment,whereas they were the least in the treatment of 1 unit fertilizer amount.The nitrate content in the leaves increased significantly with the fertilizer amount,and the highest nitrate content and soluble protein content were in the treatment of 1 unit fertilizer amount,while the highest soluble sugar content was in the 1/4 unit fertilizer amount treatment.Based on comprehensive consideration of yield and quality,it was suggested that 1/4 unit fertilizer amount treatment was suitable for lettuce grown with vinegar residue substrate.