有机无机肥配施对莴苣产量及品质的影响

采用田间小区试验,研究了不同有机无机肥配施对莴苣功能叶硝酸还原酶(NR)、根系特性、产量和品质的影响.结果表明:在施用无机肥的基础上配施有机肥可提高莴苣叶片的硝酸还原酶活性,增强莴苣的根系活力,显著提高莴苣的产量,增加莴苣茎叶中可溶性糖、维生素C的含量,降低茎叶中硝酸盐、粗纤维的含量.与施纯化肥处理相比,以20％的猪粪堆肥氮配施80％的化肥氮处理的效果最好,莴苣功能叶NR酶活性提高了28.2％～178.5％,根系活力提高了16.4％～38.9％,总产量增加了48.3％.

Effects of Combined Application of Organic Fertilizer with Inorganic Fertilizer on Yields and Quality of Lettuce

Field plot trial was conducted to study the effects of combined application of organic fertilizer with inorganic fertilizer on the activity of nitrate reductase(NR),root characteristics,yield and quality of lettuce.The results indicated that combined application of organic fertilizer with inorganic fertilizer can promote the activity of NR in lettuce functional leaves and the root vigor of lettuce,significantly increase the yield of lettuce,and increase the contents of vitamin C and soluble sugar in stem and leaves of lettuce,while the contents of nitrate and crude fiber in stem and leaves of lettuce were decreased.Compared with pure chemical fertilizer treatment,the activity of NR in lettuce functional leaves was improved by 28.2%~178.5%,the root vigor of lettuce was improved by 16.4%~38.9%,and the yield of lettuce was increased by 48.3% in the treatment applied the combination of 20% pig manure composting nitrogen and 80% chemical nitrogen fertilizer.