黄土高原典型地区种植模式产量效应模拟与效益评价研究

Yield Simulation and Effect Evaluation of Cropping Patterns of Typical Areas on Loess Plateau

利用作物生长模型软件包DSSAT3 ,模拟研究了黄土高原典型地区主要种植模式的产量效应与年际变异情况 ,并采用耗水系数、耗氮系数和经济收益值 ,综合评价了各种植模式的资源利用效率与经济效益 ,选择出了关中平原区、渭北高原区资源利用效益高、经济效益好的最优种植模式 ,分别为冬小麦 夏玉米、春玉米。

The yield effect and annual deviation of several cro pp ing patterns in the typical area of loess plateau were simulated with crop model software package DSSAT3. Water use index, nitrogen use index and economic retur n were used to evaluate resources use efficiency and economic benefit. The optim um cropping patterns with efficient resources utilization and high economic retu rn on Guanzhong plain, Weibei highland are 'wheat-maize' double cropping, 'sp ring maize' single cropping, respectively. The study has explored a useful metho d and evaluation system for cropping pattern choices.