城市生活污水浇灌对银杏幼苗生长的影响

采用定量浇灌的方法,在景德镇市研究了浇灌城市生活污水对银杏(Ginkgo biloba)幼苗生长的影响。结果表明,处理B (污水稀释60%)和处理C (污水稀释100%)对银杏幼苗的苗高增长有显著的促进作用,而处理A (污水不稀释)显著抑制苗高、叶面积、茎粗的增长;同时处理A的幼苗叶片叶绿素含量为2.65 mg/dm2,与对照1.938mg/dm2存在显著的差异,而处理B和处理C与对照之间不存在显著差异。通过以上实验结果分析,当污水稀释至一定比例,例如0.6:1和1:1时,都对银杏幼苗生长有一定的促进作用;污水灌溉能使得银杏的叶绿素含量明显增加,很有效地促进银杏的光合作用。  

Effects of Urban Domestic Sewage Irrigation on the Growth of Ginkgo biloba

The method of quantitative watering was used to study the effect of urban domestic sewage irrigation on Ginkgo biloba seedling growth.The results showed that,B treatment（wastewater dilution at 60%） and C treatment（wastewater dilution at 100%） could significantly improve the growth of G.biloba seedlings,but A treatment（wastewater not diluted） significantly inhibited the increment of seedling height,leaf area and stem diameter;at the same time,seedling leaf chlorophyll content of seedlings with A treatment was 2.651mg/dm2,which had a remarkable difference with the control treatment of 1.938 mg/dm2,but no remarkable difference existed between the control treatment and B treatment and C treatment.Through the above analysis of experimental results,when it was diluted to a certain proportion,for instance,0.6：1 and 1：1,the sewage can improve to some extent the seedling growth of G.biloba.Sewage irrigation could make the chlorophyll content in G.biloba increase significantly,and thus promote its photosynthesis very effectively.