Effects of different fertilizers on soil nutrient changes in Angelica sinensis
[Objective]To elucidate the effect of different fertilizers on soil nutrients and uptake of An-gelica sinensis,and to provide a scientific basis and important reference for rational fertilization and ecologi-cal planting of A.sinensis.[Method]Seven different fertilizers[T1(diammonium phosphate 750 kg/hm2),T2(bacterial manure 2 250 kg/hm2),T3(bacterial manure 2 250 kg/hm2+organic fertilizer 6 000 kg/hm2),T4(organic fertilizer 12 000 kg/hm2),T5(organic fertilizer 18 000 kg/hm2),T6(organic fertilizer 24 000 kg/hm2)and T7(organic fertilizer 30 000 kg/hm2)]were designed on the basis of chemical fertilizer,bacterial manure and organic fertilizer without fertilization as the control(CK)and the soil nutrients(total N,P and K,alkali-hydro N,available P and K,soil organic matter and pH value)were determined at the har-vest stage.[Result]There were significant effects of different fertilizers on soil nutrient changes of A.sinen-sis.The alkali-hydro N,available P,total K and available K decreased by 66.5%,63.1%,0.85%and 12.3%respectively under the CK.The soil organic matter decreased by 17.6%while the N,P and K were opposite under T1 treatment.The total N and K,available K and soil organic matter decreased by 17.3%,4.98%,52.1%and 5.29%respectively while the P was opposite under T2 treatment.The total N and P,available P and K,and soil organic matter decreased by 17.5%,11.5%,60.4%,7.16%and 14.8%under the T3 treatment,respectively.In general,the uptake of total N and alkali-hydro N were significantly de-creased,while the uptake of total P and K,available P and K,and soil organic matter were significantly in-creased with the increase of organic fertilizer application(T4 to T7).The pH value increased in the CK,T4 to T7 treatments,while it decreased in the T1 to T3 treatments.[Conclusion]The T3 treatment(bacterial ma-nure 2 250 kg/hm2+organic fertilizer 6 000 kg/hm2)is the most favorable for to the absorption and utiliza-tion of soil nutrients by A.sinensis,which can be promoted and applied in the planting and cultivation of A.sinensis.
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