干旱荒漠区不同盐渍化土壤沙地云杉造林试验

Afforestation Experiment of Picea mongolica on Different Salinized Soils in Arid Desert Regions

为解决干旱荒漠区盐渍化土壤造林成活率低的问题,本研究在民勤沙生植物园选择不同的土壤类型,对沙地云杉5年生苗木进行造林试验,同时在同一立地条件下开展5年和12年苗的造林试验,通过造林成活率、生长量调查研究,总结出民勤干旱区适宜于沙地云杉造林的技术方案。研究结果表明:沙地云杉在民勤地区造林适宜的土壤类型为沙壤土,适宜造林的苗木规格为5年生以上的苗木,苗龄超过5年的,带土移栽造林成活率会显著提高,裸根苗适宜的造林时间为春季4月底,带土球移栽在春季或秋季均可进行,夏季温度过高,不易开展造林。

This study conducted afforestation experiments with 5-year-old seedlings of Picea mongolica on various soil types selected from the Minqin Sandy Botanical Garden.Additionally,afforestation experiments with 5-year-old and 12-year-old seedlings were also conducted under the same site conditions.Through the investigation of survival rates and growth increments,a technical plan suitable for the afforestation of Picea mongolica in the arid region of Minqin was summarized.The results show that the suitable soil type for the afforestation of Picea mongolica in Minqin is sandy loam.The appropriate seedling size for afforestation is seedlings older than 5 years,which would make the survival rate of transplanted seedlings with soil significantly improved.The suitable afforestation time for bare-root seedlings is the end of April in spring,while transplantation with soil balls can be performed in either spring or autumn.Summer is not suitable for afforestation due to excessively high temperatures.