The Research On High-ridge Potato Production With Water Fertilizer Use Efficiency Under Drip Irrigation In Inner Mongolia Yin Hilly Area

In this experiment of drip irrigation under high ridge, the NPK fertilizer is basically the same in the total amount of fertilizer, the NPK fertilization in different time in different growth stages of potato, fertilizer plant utilization and potato yield were studied:(1)In the potato plant growth throughout the reproductive period, stem leaf, root and tuber of NPK concentration drops to different extent.1/3 as basal 2/3 nitrogen topdressing processing tuber and whole plant potassium accumulation is the largest, fastest absorption rate and the strain; All under drip tuber and whole plant phosphorus accumulation, the largest fastest absorption rate and the strain;(2)A third highest basal 2/3 NPK fertilizer topdressing processing agriculture utilization, and also the efficiency of potash is highest, full irrigation treatment highest nitrogen phosphorus utilization;(3) A third as basal 2/3 topdressing processing potato yield and farmers’net benefits are the highest;(4) In the target yield under the premise of 45000kg/hm2, potato pure N 187.5 kg/hm2 optimized fertilization, P2O5 is 75 kg/hm2, K2O is 375 kg/hm2, Yin area potato high ridge optimum fertilization way under the drip irrigation for 1/3 as basal 2/3 topdressing fertilizers.