摘要
采用３１１－Ａ最优混合设计进行盆栽试验，研究了３种化学物质组合量比对莴笋茎叶产量和硝酸盐含量的影响，并对４个最适组配量比进行了田间莴笋和小白菜试验。结果表明，化学物质对莴笋茎、叶和总产量的效应可用三元二次回归方程式定量描述。化学物质组合可提高莴笋产量３．７％～２９．３％。其中，处理３（赤霉素２８．７ｍｇ／Ｌ＋钼酸铵１５９ｍｇ／Ｌ＋双氰胺４８．８ｍｇ／盆）、４（赤霉素４６．３ｍｇ／Ｌ＋钼酸铵１５９ｍｇ／Ｌ＋双氰胺４８．８ｍｇ／盆）、８（赤霉素２５ｍｇ／Ｌ＋钼酸铵３００ｍｇ／Ｌ＋双氰胺２６．３ｍｇ／盆）和１１（赤霉素３７．５ｍｇ／Ｌ＋钼酸铵３００ｍｇ／Ｌ＋双氰胺３７．５ｍｇ／盆）增量大，明显降低莴笋茎、叶硝酸盐含量（１３．７％～２２．６％）。田间试验４个最适组合量比提高莴笋茎、叶产量３．２％～１１．７％和小白菜产量６．３％～１１．８％；硝酸盐则分别降低１２．４％～４０．６％和１８．６％～２５．６％。
The optimum mixed design, 311-A, was used to study the effects of different combinations of gibberellin (G), ammonium molybdate (M) and dicyandiumide (D) on stem and leaf yield of lettuce (Lactuta scariola) and nitrate in it in a pot experiment. In a field experiment, 4 optimum combinations of the above-mentioned chemical substances were used to test lettuce and Brassica chinensis L. The results indicated that the effects of the chemical substances on stem, leaf and total yield of lettuce could be quantitatively described by a regression equation with three factors. Lettuce yield increased by 3.7% ～ 29.3% with chemical treatment. In four treatments, i. e. G 28.7 mg/L + M 159 mg/L + D 48.8 mg/pot, G 46.3 mg/L + M 159 mg/L + D 48.8 mg/pot, G 25 mg/L + M 300 mg/L + D 26.3 mg/pot, G 37.5 mg/L + M 300 mg/L + D 37.5 mg/pot, lettuce yield substantially increased and nitrate contents in the stem and leaf decreased by 13.7%～22.6%. In the field experiment, the four treatments enhanced lettuce stem and leaf yield by 3.2%～11.7% and the yeild of B. chinensis by 6.3%～11.8% while nitrate content in the two vegetables decreased by 12.4%～40.6% and 18.6%～25.6%, respectively, thus greatly improving their food value.
出处
《西南农业大学学报（自然科学版）》
CSCD
1999年第2期170-173,共4页
Journal of Southwest Agricultural University
基金
重庆市科委应用基础研究项目
关键词
化学物质
硝酸盐
抑制作用
叶菜
组合量比
chemical Substance
head lettuce
chinese cabbage
nitrates
inhibition (biological sciences) action
