摘要： 选用NFT主栽生菜品种为材料,采用通用营养液配方,研究了不同培养液浓度对生菜生长发育的影响.结果表明,浓度为/4倍时生育最好,产量最高,其余的依次为1倍＞3/4倍＞3/2倍＞1/2倍＞1/4倍.但从生产实用性综合选择,以3/4倍浓度最适.形成产量差异的原因是:适宜浓度下,生菜分化叶片快,叶绿素含量高,叶形比低,叶片生长快;发根早,根系多,根重大.叶片和根系中N,P,K,Ca,Mg含量与培养液浓度并不成线性关系.
关键词:
生菜,
NFT栽培,
营养液,
浓度,
生育
Abstract: A mainly used variety and a commonly used formula w ere adopted to study the effect s of solut ion concentration on growth and development of lettuce. Fastest leaf differentiat ion and g row th, highest chlorophyll content, lowest leaf shape rat io, earliest rooting and most f lourishing roots were observed. T he result s indicated that plants under the 5/ 4 St t reatment g rew best and bore highest yield. The rest are 1St , 3/ 4St , 3/ 2St , 1/ 2St and 1/ 4St , successively. However, the opt imal select ion for practical use is 3/ 4St , w hich cost less than 5/ 4St . T he content s of N, P, K, Ca and Mg both in the leaf and in the root are not linear to the solution concent rat ion.
Key words:
Lettuce,
Nutrient film technique,
Solut ion,
Concent rat ion,
Growth and development
中图分类号:
范双喜, 伊东正. 培养液浓度对NFT栽培生菜生长发育的影响[J]. 华北农学报, 2002, 17(2): 92-96. doi: 10.3321/j.issn:1000-7091.2002.02.020.
FAN Shuangxi, Ito Tadashi. Effects of Solution Concentration on Growth and Development of Lettuce in Nutrient Film Technique Culture[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2002, 17(2): 92-96. doi: 10.3321/j.issn:1000-7091.2002.02.020.