长期施肥对旱作马铃薯产量及养分吸收规律的影响OACSTPCD

[Objective]Explore the effects of long-term different fertilization modes on potato yield and nutrient absorption in the dry farming area at the northern foothills of Yinshan Mountains.[Methods]On the basis of the long-term positioning tests at the National Soil Quality Wuchuan Observation and Experimental Station,using Huasong No.7 as test material,four treatments including no fertilization(CK),nitrogen phosphorus potassium fertilization(NPK),organic fertilization only(M),and organic fertilization on top of nitrogen,phosphorus and potassium fertilization(NPK + M)were set up.The effects of different treatments on soil nutrient contents,potato yield and yield component,dry matter accumulation,nitrogen,phosphorus,and potassium accumulation.[Results]On the 90th day after emergence,soil available nitrogen,available phosphorus,available potassium and organic matter content of NPK +M treatment increased significantly(P<0.05)by 206.85%,254.15%,241.86%,and 125.18%compared with CK.Soil pH value significantly decreased(P<0.05)by 10.81%compared with CK.Potato yield and commercial potato rate significantly increased(P<0.05)by 126.19%and 17.28%compared with CK.Dry matter accumulation significantly increased(P<0.05)by 196.92%compared with CK.The accumulation of nitrogen,phosphorus and potassium significantly increased(P<0.05)by 209.54%,167.74%and 196.13%compared with CK.Potato yield was significantly(P<0.05)positively correlated with dry matter accumulation,nitrogen accumulation and phosphorus accumulation,and extremely significantly(P<0.01)positively correlated with potassium accumulation.[Conclusion]Adding organic fertilizer on top of nitrogen,phosphorus and potassium fertilizer increased potato yield and quality,potato had the best nutrient absorption capacity,was the most suitable fertilization mode for potato in the dry farming area at the northern foothills of Yinshan Mountains.