不同种类沼液浸种对生菜种子萌发的影响

Effects of Seed-soaking with Different Kinds of Biogas Slurryon Germination of Lettuce Seeds

研究不同发酵原料和不同浓度的沼液浸种对生菜种子发芽及生长的影响。对果蔬垃圾、玉米秸秆、牛粪、厨余垃圾及其厌氧发酵后的沼液进行了性质分析,并按沼液浓度的1%、5%、10%、15%、20%、25%、30%、40%、50%、70%、100%进行稀释,分别作为培养液和浸种液进行种子发芽试验。结果表明,不同发酵原料及其沼液成分存在一定差异。以沼液为培养液时,只有在浓度为1%时对种子发芽有一定的促进作用;浓度大于1%后,抑制作用不断增强。沼液浸种时,厨余垃圾沼液、果蔬垃圾沼液、牛粪玉米秸沼液的最佳浸种浓度分别为20%、5%、25%。用未经稀释的沼液浸种时发现,浸种时间越长,发芽率越低,应根据沼液成分选择适宜的浸种浓度和时间。

In this study,the effects of different fermentation materials and seed-soaking with different concentrations of biogas slurry on germination and growth of lettuce seeds were studied.The properties of fruit and vegetable waste,corn stalk,cow dung,kitchen waste and their biogas slurry after anaerobic fermentation were analyzed,and the biogas slurry concentration was diluted at 1%,5%,10%,15%,20%,25%,30%,40%,50%,70%,100%.And,the experiment of seed germination was carried out with theses biogas slurry as culture medium and seed-soaking liquid respectively.The results showed that there were some differences between different fermentation materials and biogas slurry.Only 1%concentration of biogas slurry could promote seed germination to a certain extent when biogas slurry was used as culture medium,while seed germination was inhibited when the concentration was greater than 1%.In addition,the optimal concentration of biogas slurry of kitchen waste,biogas slurry of fruit and vegetable waste and biogas slurry of cow dung and corn stalk were 20%,5%and 25%respectively when biogas slurry was used as seed-soaking liquid.When soaking seeds with undiluted biogas slurry,it was found that the longer the soaking time was,the lower the germination rate was.Therefore,the appropriate soaking concentration and soaking time should be selected according to the composition of biogas slurry.