微型蒸发器田间实测麦田与裸地土面蒸发强度的试验研究

本文介绍了用两种不同规格的微型蒸发器测定麦田和裸地土面蒸发强度的方法，并对实测结果进行了对比分析．从实测的土面蒸发变化过程得到了小麦各生育阶段土面蒸发与总腾发量的比例关系，分析了相对土面蒸发强度与土壤含水量的关系以及土面蒸发强度与作物叶面积指数的关系．通过对试验过程和实测数据的分析，总结出两种微型蒸发器的优点和需要进一步研究解决的问题

Measurement of evaporation from wheat field and bare soil by using micro lysimeters

The method for measuring the soil evaporation from wheat field and bare soil surface by means of two types of micro lysimeter is described. The ratio between soil evaporation and crop evapotranspiration in each month and in the whole growing period of winter wheat are obtained from observed evolution of soil evaporation rate in the field. The relationship between soil evaporation and soil water content and the relationship between soil evaporation and leaf area index are analyzed. The advantages of measurement by means of these two types of microlysimeter and main problems pending for further improved are pointed out accordingly.