间作种植模式下冬小麦根系生长的时空分布及变化规律研究

Temporal and Spatial Distribution and Variation of Root System Growth of the Inter-planted Winter Wheat

针对冬小麦/春玉米间作种植模式下冬小麦的根系分布特征进行研究,分析冬小麦在间作种植模式下根系的空间变化规律及随生育时期的增长规律。研究表明,间作冬小麦根系在垂直方向上随深度的增加呈幂函数衰减规律,在水平方向上呈指数递减规律。在对根系变化规律进行统计分析的基础上,建立了衰减数学模型。同时对比分析了间作和单作2种不同种植模式下冬小麦根长密度的垂直分布。对根系生物量随时间的增长分析结果表明,2种种植模式下冬小麦根系生物量的增长均呈现“S”型曲线。

Distribution characteristic of root system was studied in the inter-planted winter wheat and spring maize, the study analyzed the spatial variation and increase with growth season of winter wheat in the intercropping system. The study showed that root system of the inter-planted winter wheat decrease with increase of depth and horizontal distance, the regular function is power function in depth and exponential function in horizon range. On the basis of statistical analysis, the mathematical models were fitted. Vertical distribution of root length density about winter wheat was analyzed under intereropping and sole planting patterns. The biomass of root system was showed ＂S＂ curve with growth season under different planting patterns.