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阐述了田间土壤水全时空调控的概念与措施,分析了土壤水流动系统与田间土壤水调控的关系.通过覆盖、微地貌与种植方式结合等措施可以调控土壤水流动系统的上边界条件,通过改良土壤等措施可以改善土壤水流动系统浅部介质的渗透性与储水性,从而形成优化的田间微水文系统、微气候系统与微流动系统,使土壤水流动系统变动带的水分更多地向根系汇流区汇流,提高水分利用率.以棉花种植方式与微地貌结合的试验为例,论证了棉田土壤水调控的可行性与效果.采用调控措施的棉花,较普通对照处理水分生产率由0.49kg/m3提高到0.76~0.86kg/m3.
The concept and measures of full temporal and spatial control of soil water in field are expounded, and the relationship between soil water flow system and field soil water regulation is analyzed. Through the combination of covering, micro-topography and planting methods, the upper boundary conditions of soil water flow system can be controlled and the permeability and water storage capacity of shallow medium in soil water flow system can be improved by improving the soil and other measures to form the optimized field micro-hydrology System, microclimate system and microfluidic system, make the water in the soil water flow system more confluence to the root confluence area and improve the water use efficiency. Taking the experiment of combining cotton planting mode and micro-topography as an example, the feasibility and effect of soil water regulation in cotton field were demonstrated. With the control measures of cotton, compared with the conventional control of water productivity increased from 0.49kg / m3 to 0.76 ~ 0.86kg / m3.