In order to explore the response of maize phosphorus absorption to the appropriate proportion of organic fertilizer substitution for reduced chemical fertilizer,a field experiment with eight treatments was conducted i...In order to explore the response of maize phosphorus absorption to the appropriate proportion of organic fertilizer substitution for reduced chemical fertilizer,a field experiment with eight treatments was conducted in 2018.The eight treatments in the trial were:(1)CK;(2)M0+F;(3)M1+F1;(4)M1+F2;(5)M2+F1;(6)M2+F2;(7)M3+F1 and(8)M3+F2.In these treatments,M0,M1,M2 and M3 were organic fertilization of 0,15(low),30(medium)and 45(high)m3•hm-2,respectively.F1 and F2 indicated 20%and 40%reduction of conventional chemical fertilization.The soil nutrient content,phosphorus accumulation,dry weight,yield and yield components of maize were analyzed.The results showed that the phosphorus accumulation of maize stalks and leaves were 3.30%-43.17%and 10.98%-84.95%higher in M3+F1 treatment(20%reduction of chemical fertilizer with organic fertilizer of 45 m3•hm-2)than those in the conventional treatment(M0+F)during the maize reproductive period.At R2 stage,stalk and shoot P accumulation of M3+F1 treatment were 24.67%-43.18%and 20.34%-25.19%higher than other treatments,respectively.At V12 stage,leaf P accumulation of M3+F1 increased by 84.95%compared with other treatments.The maize yield of M3+F1 was significantly higher than that of other treatments,even though the partial productivity of the total phosphorus fertilizer of M3+F2 was the highest in the treatments.It could be found that the substitution of organic fertilizer for chemical fertilizer improved crop yield,phosphorus fertilizer efficiency and accumulation.M3+F1 treatment had the most positive effects on improving maize phosphorus accumulation and yield.展开更多
旨在从环境样品中筛选对富营养化水体具有良好脱氮除磷效果的好氧反硝化菌。采集福州某养猪场污水处理池中的水样。通过反硝化细菌培养基培养、BTB培养基平板分离、硝酸盐还原试验和蓝白斑筛选法、异染颗粒以及聚-β-羟基丁酸(PHB)颗粒...旨在从环境样品中筛选对富营养化水体具有良好脱氮除磷效果的好氧反硝化菌。采集福州某养猪场污水处理池中的水样。通过反硝化细菌培养基培养、BTB培养基平板分离、硝酸盐还原试验和蓝白斑筛选法、异染颗粒以及聚-β-羟基丁酸(PHB)颗粒染色试验,筛选获得两株具有脱氮除磷特性的菌株,命名为N1和N2。经16S r RNA基因序列分析,N1和N2分别属于无色杆菌属(Achromobacter.sp)和短波单胞菌属(Brevundimonas.sp)。将菌株N1和N2复配,获得脱氮除磷复合菌FIM-1。考察了菌株对人工合成污水和富营养化水体脱氮除磷的效果。结果表明,两株菌在含磷量较低的水体中,对磷的去除率较高,相对于单菌,复合菌表现出更佳的脱氮除磷效果。展开更多
基金Supported by the National Key Research and Development Plan Project(2017YFD0201803)。
文摘In order to explore the response of maize phosphorus absorption to the appropriate proportion of organic fertilizer substitution for reduced chemical fertilizer,a field experiment with eight treatments was conducted in 2018.The eight treatments in the trial were:(1)CK;(2)M0+F;(3)M1+F1;(4)M1+F2;(5)M2+F1;(6)M2+F2;(7)M3+F1 and(8)M3+F2.In these treatments,M0,M1,M2 and M3 were organic fertilization of 0,15(low),30(medium)and 45(high)m3•hm-2,respectively.F1 and F2 indicated 20%and 40%reduction of conventional chemical fertilization.The soil nutrient content,phosphorus accumulation,dry weight,yield and yield components of maize were analyzed.The results showed that the phosphorus accumulation of maize stalks and leaves were 3.30%-43.17%and 10.98%-84.95%higher in M3+F1 treatment(20%reduction of chemical fertilizer with organic fertilizer of 45 m3•hm-2)than those in the conventional treatment(M0+F)during the maize reproductive period.At R2 stage,stalk and shoot P accumulation of M3+F1 treatment were 24.67%-43.18%and 20.34%-25.19%higher than other treatments,respectively.At V12 stage,leaf P accumulation of M3+F1 increased by 84.95%compared with other treatments.The maize yield of M3+F1 was significantly higher than that of other treatments,even though the partial productivity of the total phosphorus fertilizer of M3+F2 was the highest in the treatments.It could be found that the substitution of organic fertilizer for chemical fertilizer improved crop yield,phosphorus fertilizer efficiency and accumulation.M3+F1 treatment had the most positive effects on improving maize phosphorus accumulation and yield.
文摘旨在从环境样品中筛选对富营养化水体具有良好脱氮除磷效果的好氧反硝化菌。采集福州某养猪场污水处理池中的水样。通过反硝化细菌培养基培养、BTB培养基平板分离、硝酸盐还原试验和蓝白斑筛选法、异染颗粒以及聚-β-羟基丁酸(PHB)颗粒染色试验,筛选获得两株具有脱氮除磷特性的菌株,命名为N1和N2。经16S r RNA基因序列分析,N1和N2分别属于无色杆菌属(Achromobacter.sp)和短波单胞菌属(Brevundimonas.sp)。将菌株N1和N2复配,获得脱氮除磷复合菌FIM-1。考察了菌株对人工合成污水和富营养化水体脱氮除磷的效果。结果表明,两株菌在含磷量较低的水体中,对磷的去除率较高,相对于单菌,复合菌表现出更佳的脱氮除磷效果。
