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为了进一步证明农田覆盖具有明显的增产作用,通过对土壤各层次的水分进行逐日的连续观测并计算了全生育期的总蒸散量。计算结果表明:覆盖地的土壤水份状况有所改善,特别是苗期最为明显。而总蒸散量与对照地相差不大。说明覆盖地有部分用于土壤物理蒸发的水分转化成作物蒸腾,提高了水分利用效率。
In order to further prove that farmland coverage has a significant yield-increasing effect, the daily evapotranspiration of all levels of soil was continuously observed and the total evapotranspiration during the whole growth period was calculated. The calculation results show that the soil moisture in the covered area has been improved, especially in the seedling stage. The total evapotranspiration and control or less. This shows that some of the land cover has been converted into crop evapotranspiration to increase soil water use efficiency and improve water use efficiency.