| The field experiments were conducted in the middle of Shaanxi province, applying the cultivation of plastic film mulching on ridge and sowing in furrow, on purpose to study the effect of mulching and rain-harvesting cultivation on yield and nutrient uptake of winter wheat. The results show that mulching and rain-harvesting can increase yield obviously. Under the condition of film mulching, the biomass yield and the grain yield of high N treatments were raised by 15.9% and 22.6% respectively compared to those of low N treatments. Under the condition of high N and high density, the biomass yield and the grain yield of the mulching treatments were increased by 39.5% and 28.9% respectively compared to those of the no mulching treatments. The highest yield was gotten in the treatment of high N and low density, being 7 898 kg/hm2. Plastic mulching and rain harvesting cultivation was bendficial to harmonize the relationship between soil water and nutrients, stimulate the nutrient uptake of crops, and realize high yield. |