有机活性改土剂对土壤理化性质的影响及最佳施用量研究

Influence of Organic Active Soil Modifying Agent to the Soil Physical and Chemical Properties and Optimum Application Rates

采用盆栽试验方法,研究了有机活性改土剂对土壤理化性质及持水量的影响和种植马铃薯的最佳施用量,结果表明:有机活性改土剂各原料的影响效应大小为CO(NH_2)_2>改性糠醛渣>(NH_4)_2HPO_4>5406菌肥,有机活性改土剂的最佳配方为5406菌肥、改性糠醛渣、CO(NH2)2、(NH4)2HPO4质量比为0.000 8∶0.905 8∶0.072 3∶0.021 1的组合;有机活性改土剂施用量与土壤孔隙度、持水量、团聚体含量、有机质含量、速效氮磷钾含量和马铃薯产量呈显著的正相关关系,与土壤容重、p H值呈显著的负相关关系;随着有机活性改土剂施用量的增加,马铃薯施肥效益在增加,但当有机活性改土剂施用量大于12 t/hm^2时,施肥效益开始下降;经回归分析,马铃薯产量与有机活性改土剂施用量间的回归方程为y=27.270 0+1.681 0x-0.058 4x2,最佳施用量为11.96 t/hm^2,此施用量下马铃薯理论产量为39.02 t/hm^2。

The paper studied the influence of organic active soil modifying agent to the soil physical and chemical properties and moisture-holding capacity and the optimum application rates of potato by using pot experiment method.The outcomes show that a) the influential effect order of each raw material of organic active soil modifying agent is C0(NH_2)_2> modified furfural residue >(NH_4),HPO_4> antagonistic fertilizer5406.The best formula of organic active soil modifying agent is antagonistic fertilizer 5406,modified furfural residue,CO(NH_2)_2 and(NH_4)_2HPO_4 and the combination ratio is 0.000 8:0.905 8:0.072 3:0.021 1;b) the application rates of organic active soil modifying agent with soil porosity,aggregate content,water holding capacity,organic matter,available nitrogen,available phosphorus and available potassium and potato yield shows significantly positive correlation and shows significantly negative correlation with soil bulk density and pH value;c) along with the increase of application rates of organic active soil modifying agent,the fertilization profit of potato is increased.When the application rates are greater than 12 t/hm^2,the fertilization profit begins to decrease and;d) through regression analysis,the regression equation between the potato output and the application rates of organic active soil modifying agent is y= 27.270 0+1.681 0x-0.058 4x^2.The optimum application rate is 11.96 t/hm^2 and the theoretical yield of potato is 39.02 t/hm^2.