作物需水时空尺度特征研究进展

受气象、土壤和种植条件等客观条件的影响，作物需水时空尺度分布具有明显的时空异质性，致使作物需水的理论和模型具有高度的尺度依赖性。基于此，该文对作物需水时空尺度特征的计算方法及其运用情况作了详细的阐述，并建议在今后作物需水时空尺度特征的进一步研究中，应以试验数据为基础，运用分形、小波、信息熵等复杂性理论，研究作物需水的时空尺度特征，发展既有理论基础又便于应用的区域尺度的作物需水量估算新模式。

Advances in researches on the spatial-temporal features of crop water requirement

Influenced by meteorological, soil, planting conditions and so on, crop water requirement is obviously characterized by its spatial-temporal heterogeneity on different scales. As the result of this heterogeneity, the theories and models of crop water requirement were highly scale-dependent. The calculation method of spatial-temporal features of crop water requirement was expounded. Finally, this paper suggests that, based on the experimental data, a new multi-scale crop water requirement estimating model of theoretical basis and wide application should be developed, and the spatial-temporal features of crop water requirement should be analyzed, using the complexity theories such as the fractal theory, the wavelet analysis and the information entropy approach.