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在西非Sudanian稀树草原森林,计划火烧是一种森林管理措施。开展试验评价火烧季节和不同垂直探测点对最大火温度以及60℃以上火温持续时间的影响,这样的温度对植物组织来说是致命的。设定的火烧季节包括:季初火烧-旱季初期(12月初)、季中火烧-旱季最干旱的时候(1月中旬)、季末火烧-旱季末期(3月末)。调查了不同季节火烧对3种具有社会-经济价值的树种过火后种子萌发的影响。结果表明,最大燃烧温度和火烧持续时间在旱季不同的时期火烧和垂直探测位置均存在显著差异(p<0.001)。火烧初期地面20cm的火温最高、持续时间最长,火烧中期和末期地表温度最高、持续时间最长。这种差异影响不同土壤深度的种子的萌发过程。讨论了当前林业管理措施中的一些心得。
Planned fires are a form of forest management in the Sudanian savannah forest in West Africa. Experiments were conducted to evaluate the effect of the fire season and different vertical detection points on the maximum fire temperature and the duration of the fire temperature above 60 ° C, which is fatal to plant tissue. The set fire season includes: Early Season Fire - Early Dry Season (early December), Mid Season Fire - Dry Season Most Dry (Mid January), Season End Fire - Late Dry Season (Late March). The effects of fire in different seasons on the seed germination after three fires of socio-economic value were investigated. The results showed that there was a significant difference (p <0.001) between the maximum combustion temperature and the duration of the fire in different periods of the dry season. Fire early 20cm on the ground the highest temperature of fire, the longest duration, the middle and last fire surface temperature of the highest, the longest duration. This difference affects the germination of seeds of different soil depths. Discussed some of the current forestry management measures in the experience.