[1]韩仕峰,李玉山,张孝中,等.黄土高原地区土壤水分区域动态特征[J].水土保持研究,1989,(01):161-167.
Han Shifeng,Li Yushan,Zhang Xiaozhong,et al.The Regional Dynamic Characteristics of Soil Water on the Loess Plateau[J].Research of Soil and Water Conservation,1989,(01):161-167.
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Han Shifeng,Li Yushan,Zhang Xiaozhong,et al.The Regional Dynamic Characteristics of Soil Water on the Loess Plateau[J].Research of Soil and Water Conservation,1989,(01):161-167.
黄土高原地区土壤水分区域动态特征
《水土保持研究》[ISSN:1005-3409/CN:61-1272/P]
卷:
期数:
1989年01期
页码:
161-167
栏目:
出版日期:
1900-01-01
- Title:
- The Regional Dynamic Characteristics of Soil Water on the Loess Plateau
- 摘要:
- 黄土高原地区土壤水分动态特征：一是土壤墒情恢复时间，由南向北和由东向西逐渐提高，高原北部和西部，接近与农作物生长同步，对提高降雨利用率有利；土壤失墒主要分布在两个时期：第一个时期在9—12月份，日平均失水0.64mm，失水量在平均值以上，为丰水失水期，第二个时期在3—7月份，日平均减少0.5—2.34mm，失水量在年平均值以下，为亏缺失水期。冬季蒸发量较少，地区之间有所不同，南部塬区为微弱蒸发，北部丘陵区为缓慢蒸发，西部地区为基本稳定期。二是剖面水分分布分为速变层、活跃层、次活跃层和相对稳定层四个部分。黄
- Abstract:
- The soil on the loess plateau varied in texture generally from heavy to light loam; the field moisture capacity of them is about 20%; while their permanent wilting point ranged between 3.8-7.8%, and most of the soil types are within 5-6%.The dynamic characteristics of soil water in the barerainfied farmland are as followings: 1.The recovering time for soil moisture is moving along generally from south to north and from east to west respectively, while in the northern and western area, it is nearly simultaneous with the crop growth, which is helpful to raising the utlization ratio of rainfall.There are two critical periods for the loss of soil water.The first period called abundant water loss period is from September to december in which the water loss ratio is 0.64ram/day, which is above the annual average value.The second period called deficient water loss period is from March to July in which the water loss ratio is between 9.5-2.34mm/day, which is lower than the annual average value.2.The soil profile can be divided into four sections, (1) fast variation layer: this layer generally ranged from 0-20cm depth on loess plateau area.(2) active layers It ranged generally from 20-60cm depth in eastern area and from 10-30cm depth in western areas.(3) sub-active layer: It can reach to 200cm depth for Huang Mian soil in north area and reach to 80-90cm depth in the other areas.(4) relative stable layer: This layer only exists in western and southern plateau.
参考文献/References:
[1] 武汉水利电力学院农田水利教研室:《作物的合理用水》,农业出版社,1978年
[2] 李玉山等:"黄土高原土澳水分性质及其分区",《中国科学院西北水土保持研究所集刊》,第2集,1985年
更新日期/Last Update:
1900-01-01