Impact of Two New Fertilizers on Effect of Soybean Fertilizer & Planting Density and Soil Enzyme Activity
In this study,the effects of two new fertilizers and their matching application methods on soybean density and soil enzyme activity were researched.'ZLD 120'was used as the experimental material,the split-plot trial was performed with 6 fertilization treatments(blank fertilization,normal fertilization,low concentration ammonium thiosulfate,high concentration ammonium thiosulfate,0.5 normal fertilizer+Master Copper,0.3 normal fertilizer+Master Copper,respectively recorded as T1,T2,T3,T4,T5,T6)as main zones and 3 planting density levels(15× 104 plants/hm2,20× 104 plants/hm2 and 25× 104 plants/hm2)as sub zones.The results showed that under the same fertilization treatment,the soybean yield increased firstly and then decreased with the increase of planting density,and reached the maximum at M2.With the increase of planting density,the main stem diameter and chlorophyll content gradually decreased,and the plant height and leaf area index gradually increased.Under the same planting density,the yield,leaf area index,soil alkaline phosphatase and sucrase activity increased,but the plant height,main stem diameter and soil urease activity of soybean reduced in ammonium thiosulfate treatment.Compared with T1 and T2,the chlorophyll content was higher in T3.The chlorophyll content increased in T1 compared with T4.Soybean yield under the Copper Master treatment was significant higher in T4 and T5 than that in T1 and T2 under M3 density,but the overall yield was low compared with other densities at this time.The plant height,main stem diameter,leaf area index and soil enzyme activity trend of soybean under Copper Master treatment were lower than that of T1 and T2 on the whole,but the chlorophyll content showed contrary result.To sum up,ammonium thiosulfate treatment under 20 × 104 plants/hm2 was the best cultivation pattern,and the maximum yield was 3200.00 kg/hm2 under M2T4.We should explore the application of Copper Master on soybeans for the future research.
soybeanfertilizer and planting densityyieldgrowsoil enzyme
万方数据
维普
