吉林西部野生罗布麻生长季内土壤水盐变化趋势的研究

对吉林西部野生罗布麻分布区0~50 cm深度的土壤水盐变化趋势进行了研究,结果发现:土壤水分在水平格局的3个区有所不同,密集区和边缘区土壤水份含量和变化趋势相近,空白区土壤水份高于前两个区,垂直格局中,水份波动幅度随深度的增加而递减;土壤全盐量在水平格局的3个区含量不同,密集区边缘区空白区,在垂直格局中,密集区随深度增加,全盐量的波幅递减,边缘区和空白区是20~30 cm层含量高、波幅大,其它二层含量低波幅小;水平格局3个区的pH值是:密集区边缘区空白区,垂直格局中,密集和边缘两个区的20~30 cm层pH值高于其他两层,空白区pH值随深度增加呈递减趋势。正常生长的罗布麻土壤水份含量在9%~20%之间;全盐量在0.05%~0.25%之间;pH值在7.8~9.4之间。当生长季内大部分时间水份低于5%或高于21%、全盐量在0.35%以上、pH值高于9.8时,罗布麻不能生长。罗布麻根系发达,能贮存较多水分以应对干旱环境。该植物适于栽培在垄高为20~30 cm的环境中。苗期能耐受较高的全盐量和pH值,是一种适合于干旱盐碱环境的经济植物。

Variation Trends of Soil Moisture and Salinity During the Growth Season of the Wild Apocynum venentum L. in West Jinlin

The variation trends of moisture and salinity within the 0~50 cm depth soil,in which the wild Apocynum venentum L.distributed in the West Jilin,were studied.The results showed that there are three different kinds of distribution regions in horizontal pattern,the concentrated regions,the marginal regions and the blanked regions.The soil moisture trends are similar in concentrated regions and marginal regions;the soil moisture in the blanked regions is higher than those in the other two regions;the fluctuatio...