土壤水变动与根、冠调节的关系及其对节水的应用

Regarding crop plant as a whole, root-shoot relations were studied under fluctuating soil water conditions. A conceptual model which is logically self-consistent was set up. The nonlinear surface autonomous system model characterizing root-shoot relations was developed based upon the conceptual model. The complexity of root-shoot behavior in adaptive response to soil water was found employing the analysis of root-shoot trajectories in the phase space. Proposing the concepts and definition formulae of the crop plant responses as the processes to the changed soil water, the growth delay, after-effect of the water stresses, the growth rate response to rewatering and decrease in the total dry matter were found. Thereby, the probable mechanism of a feed-back regulation was proposed. Some of issues closely linked with the practice in the field were presented for re-examination.

以实验为基础，以原始观测为依据，研究土壤水变动与作物长时效、不可逆、非线性的整体行为的关系，探索根、冠间互惠竞争平衡的稳定性和稳定溃塌的条件，揭示土壤干旱后增加水量引起的生长滞后和补偿的系统机制和数量关系。从而深化土壤水和作物关系的认识，发展作物高效用水的土壤和作物管理技术，为有关学科提供这方面的依据，为节水农业服务。