有机覆盖物对城市绿地土壤水分和温度的影响
In order to study the effect of organic mulch on soil moisture and temperature in urban green space, three experimental treatments were designed in green land of urban park as the followings: 3cm mulch, 5cm organic mulch and no cover to study the change of soil moisture and temperature in the depths of 0~10cm, 10~20cm, 20~30cm and 30~40cm. The result of continual observation from March to December in 2008 shows that: (1) Seasonal variation of soil moisture displayed the same trend in the three experimental treatments,the largest fluctuation of soil moisture was found in depth of 0~10cm, and the larger the soil depth, the smaller the fluctuation; (2) 3cm mulching increased soil moisture in the four depths compared to the control, and more obvious in the depths of 10-20cm and 20-30cm; while 5cm mulching just significantly increased soil moisture in the depth of 0-10cm compared to the control; (3) Seasonal variation of soil temperature is the same in three experimental treatments. The range of diurnal-variation is smaller in the mulching than in the control, 3cm and 5cm mulching decreased daily soil temperature by 2.0℃ and 0.9℃ respectively in the summer and increased daily soil temperature by 0.9℃ and 1.4℃ respectively in the winter compared to the control. At the same time, mulching reduced the variation of soil temperature among soil depths.
作 者： 陈玉娟 王成 郄光发 王艳 张伟 作者单位： 陈玉娟(中国林业科学研究院林业研究所国家林业局森林培育重点实验室,北京,100091)王成,郄光发(中国林业科学研究院林业研究所国家林业局森林培育重点实验室,北京,100091;国家林业局城市林业研究中心,北京,100091)
王艳,张伟(天坛公园管理处,北京,100061)
刊 名： 中国城市林业 英文刊名： JOURNAL OF CHINESE URBAN FORESTRY 年，卷(期)： 2009 7(3) 分类号： S7 关键词： Organic mulch Urban green space Soil moisture Soil temperature