施肥和苇田耕翻对芦苇产量的影响

目的]为黄河三角洲人工高产开发自然芦苇提供依据。方法]在芦苇进入生长初盛期时分别施75.01、12.51、50.0 kg/hm2的尿素和复合肥,对退化苇田春季耕翻15 cm进行耕翻复壮试验,研究施肥和苇田耕翻对芦苇产量的影响。结果]单施复合肥的增产效果不及单施尿素显著。尿素用量与芦苇产量呈正比,施尿素150.0 kg/hm2处理的增产幅度达40.9%,但叶绿素和纤维素含量不是最高。综合考虑,施尿素112.5 kg/hm2处理的效益最好。苇田耕翻提高了土壤肥力,减少了杂草,促进了芦苇发育。苇田耕翻3年后,芦苇的每株芽数、根状茎长度、根状茎烘干重比不耕翻苇田分别增加了116.67%1、27.58%和24.81%。结论]合理施用氮肥和翻耕苇田均可以提高芦苇产量。

Effect of Fertilization and Ploughingin Reed Field on Reed Yield

Objective] The study aimed to provide basis for artificial high yield development on the natural reed in Huanghe River delta.Method] When the reed came into early growth peak stage,the urea and compound fertilizer were applied in the field at 75.0,112.5,150.0 kg/hm2 and the degenerated reed field was ploughed in 15 cm deep for ploughing and rejuvenation experiment to study the effect of fertilization and ploughing in reed field on reed yield Result]The yield increasing effect of single application of compound fertilizer was not as obvious as that of single application of urea.The urea rate was positively related to the reed yield.The yield in the treatment with urea at 150.0 kg/hm2 was increase by 40.9%,but the chlorophyl and fibrin content in this treatment were not highest.Considering comprehensively,the treatment with urea at 112.5 kg/hm2 could get highest benefit.Ploughing in reed field could increase the soil fertilizer,decrease weed and promote the reed growth.After the reed field was ploughed for 3 years,the reed buds per plant,length of rhizome and drying weight ratio of stem were increased by 116.67%,127.58%和24.81% resp.compared with that in the reed field without ploughing.Conclusion] The rational N fertilizer application and ploughing in reed field could increase the reed yield.