Li Kaiyuan,Han Shifeng,Li Yushan,et al.FIELD WATER CYCLE AND SOIL WATER ECOLOGICAL ENVIRONMENT OF CROPS IN THE LOESS HILLY REGION[J].Research of Soil and Water Conservation,1991,(01):83-93.
黄土丘陵区农田水分循环特征及土壤水分生态环境
- Title:
- FIELD WATER CYCLE AND SOIL WATER ECOLOGICAL ENVIRONMENT OF CROPS IN THE LOESS HILLY REGION
- Keywords:
- loess hilly; water cycle; ecological environment
- 摘要:
- 在评价土壤水分性质的基础上,本文系统地讨论了黄土丘陵区农田水分循环特征及作物土壤水分生态环境,并从理论上解释了该区域土壤有效水利用率较高,土壤低温度仍表现出较高的有效性.同时指出,该区域土壤有效水库容大,对作物供水调节能力强;但因气候干旱,土壤水分亏缺严重,土壤只在生育期内对作物供水起调节作用,这是黄土丘陵区土壤水库效应的区域特征.此外,本文将土壤蒸发分为旱季和雨季两个时段,研究表明土壤蒸发最强的时段,在雨季而不在旱季.
- Abstract:
- Based on the evaluation of the soil water properties,this paper deals with the field water cycle and soil water environment of crops in the loess hilly region,concluding that the soil water use efficiency is high and low soil water content still displays high availability,which is explained from the theoretical point of view.Meanwhile,this paper indicates that the capacity of soil available water reservior is high,and soil capability of regulating and supplying water to plant is high as well.But because of the dry climate,the soil water is seriously deficient,therefore the effect of the regulation only takes place within the growth period,which is the regionalism of the effect of the soil water reservior.Moreover,in this paper soil evaporation is divided into two stages that are dry season and rainy season,the study shows that the stages of the maximal rate of eyaporation is not in the dry season but the rainy season.
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