Abstract:

The aims are to study the effects of various NPK combinations on yields, economic benefit, and nutrition utilization of upland wheat with mulching and no-tillage, and to provide optimized nutrient management strategies for upland wheat production. The field experiments and indoor determinations were used in this study. The data of soil wet and temperature, wheat growth, yield, economic benefit, and nutrition utilization of wheat with traditional tillage and mulching and no-tillage were obtained. The results showed that the height, soil wet and temperature in different growth periods with mulching and no-tillage (N2P2K2 Treatment) were higher than those with traditional tillage N2P2K2 (CK). The yield and economic benefit of wheat with mulching and no-tillage was 366.9 kg/hm ² (13.14%) and 503.05 yuan/hm ² (12.80%) higher than those of traditional tillage N2P2K2 (CK), respectively. Nutrition utilization of NPK with mulching and no-tillage (N2P2K2 Treatment) were higher than those with traditional tillage N2P2K2 (CK). With the mulching and no-tillage treatments, the yield and economic benefit of N0P0K0 treatment was the lowest. The yield and economic benefit of N3P2K2 treatment was the highest. NPK agronomic efficiency and NPK partial factor productivity of wheat with mulching and no-tillage treatments decreased with the increasing of NPK application. The treatment of N3P2K2 (N 225.00 kg/hm ², P₂O₅ 75.00 kg/hm ² and K₂O 75.00 kg/hm ²) obtained high nutrition utilization, high yield and high economic benefit, it was the optimum treatment in this experiment.

Key words: Nitrogen,Phosphorus,Potassium, Upland, Wheat, Mulching and No-tillage, Yield, Economic Benefit, Nutrition Utilization