【摘要】 针对黄河地区地黄品种退化、产量下降、功效降低的问题,从改善地黄产地土壤入手,以怀地黄为试材,研究生物有机肥用量对地黄生长、养分含量以及土壤根际与非根际土养分变化的影响。结果表明,与常规施肥相比,施用生物有机肥处理显著增加地黄的块根数和根粗,提高地黄产量和品质。随着生物有机肥用量的增加,地黄块根中大量元素积累量在增加,尤其是地黄中全磷(P)积累量远高于全氮(N)和全钾(K)积累量。与常规施肥相比,施用生物有机肥显著降低根际土的p H值,提高根际土中有机质、全氮、有效磷和速效钾含量,改善土壤肥力状况。综合考虑地黄块根产量、品质、养分积累以及土壤肥力变化,生物有机肥用量为4500 kg/hm2是黄河地区中等肥力地黄田增产稳收的合理施肥方式。更多还原

【Abstract】 In view of the problems of the degradation of Rehmannia glutinosa varieties,the decline of yield and the reduction of efficacy in the Yellow River region,the effects of different application rates of bio-organic fertilizers on the growth and nutrient content of Rehmannia glutinosa and the changes of soil nutrients in rhizosphere and non-rhizosphere soil were studied.The results showed that the number of root tubers,root diameter,yield and quality of Rehmannia glutinosa were significantly increased by applying bio-organic fertilizer when compared with conventional fertilization.With the increase of bio-organic fertilizer application,the accumulation of macro elements in the rhizome of Rehmannia glutinosa increased,especially the accumulation of total phosphorus(P)in Rehmannia glutinosa was much higher than the accumulation of total nitrogen(N)and potassium(K).Compared with conventional fertilization,the pH value of rhizosphere soil was significantly decreased by the application of bio-organic fertilizer,and the contents of organic matter,total nitrogen,available phosphorus and available potassium in rhizosphere soil were increased,and soil fertility was improved.Considering the changes of the yield,quality,nutrient accumulation and soil fertility of Rehmannia glutinosa,the application rate of bioorganic fertilizer 4500 kg/hm2 is a reasonable fertilizer application method for medium fertility rehmannia fields in the Yellow River region.更多还原