| To improve the yield of corn production, high efficiency utilization of water. In shaanxi ChangWu experiment stations (typical rainfed agricultural) set up 5 kinds of cultivation mode (5),1:farmers grow mode, With 2:high mode 1, With 3:high in mode 2, With 4:"high yield cultivation mode, With 5:high cultivation patterns, through research in five different cultivation mode of physiological and biochemical characteristics of spring corn crop yield, explore the changes and development of the efficiency of resource for technical principle, provides efficient cultivation maize yield. The results were as follows:1. Treatment 2, treatment 3 and treatment 4 and treatment 5 and treatment 1 (farmers planting mode) compared to production yield rate was 13.57%,20.83%,58.52% and 36.66%, four kinds of cultivation methods have achieved high yield target.2. Treatment 2, treatment 3 and treatment 4 and treatment 5 and treatment 1 (farmers planting mode) compared to water use efficiency (WUE) increased by 23.87%,24.33%, 65.16% and 42.69%3.5 kinds of different planting pattern and nitrogen partial growth force (PFP) were as follows:for 3> address 2> for 5> handle a> treatment 4; treatment 3 and treatment 2, treatment 5 and treatment 4 of the PFP than farmers planting model were increased by 20.83%, 13.59%,2.49% and-20.72%, indicating that treatment 2, treatment 3 to achieve yield and nitrogen use efficiency synchronous increase, while treatment 4, dealing with farmers planting less than 5 N recovery mode, not implemented high yield and efficiency objectives.4. Pn, Gs, Fv/Fm, Yield, qP in the whole growth period, a single peak curve, silking all reach the maximum, then gradually decreased; and Ci, NPQ changes in contrast Can be seen through the integration of innovative cultivation techniques, delayed leaf senescence and increased photosynthetic rate and the actual photochemical efficiency, access to higher photosynthetic products.Treatment 4, treatment 5, treatment 3 and treatment 2 and treatment 1 compared, Pn, Gs, Fv/Fm, Yield, qP is higher, and rate of decline in silk to the mature small; Pn average increased by 35.4%,30.85%,21.56%,14.32%, Fv/Fm on average increased by 40.78%, 35.45%,27.43%,18.56%; qP average increased by 38.4%,33.46,22.36%,15.4%; Yield average increased by 36.3%,31.58%,21.86%,14.8%;Treatment 4, treatment 5, treatment 3 and treatment 2 and treatment 1 compared to, Ci, NPQ is low, and increased speed to maturity, less spinning. Ci average decreased by 4.1%,3.0%,1.4%,0.5%, NPQ decreased on average by 8.4%,6.6%,2.6%,3.4%,2.6%. Can be seen through the integration of innovative cultivation techniques, delayed leaf senescence and increased photosynthetic rate and the actual photochemical efficiency, access to higher photosynthetic products5. of the nine main photosynthetic parameters and yield, water use efficiency and nitrogen partial factor productivity was gray correlation analysis found that, SPAD, Ci is the impact of yield, water use efficiency and nitrogen partial factor productivity of the main constraints to improve synchronization. |
