摘要
设置样方进行野外调查,对天然偃松土壤种子库空间分布进行研究。结果表明,天然偃松土壤种子库水平分布与垂直分布均具有规律性。随着距母树距离的增加,种子数量呈现减少趋势（p=0.097）。4个方向上种子数量由多至少的次序为：南〉西〉东〉北（p=0.089）,水平分布差异不显著。由枯落物层向土层深处方向种子数量逐渐减少（p〈0.05）,差异性十分显著,枯落物层和0~5 cm土壤层中含有83%的种子。种子质量调查结果,土壤种子库中63.2%为空粒种子,25.1%为腐烂种子,完整种子仅占11.7%。
By setting quadrat for field investigation, soil seed-bank spatial distribution of natural Pinus pumila was studied in the paper. The results showed that horizontal distribution and vertical distribution of natural Pinus pumila had regularity. As the distance increases from the mother tree, the seed number showed a decreasing trend （ p = 0. 097）. Seeds number of the four directions followed decreasing order as South 〉 West 〉 East 〉 North （p = 0. 089） , the difference of horizontal distribution was not significant. The seeds number was drop off gradually from litter layer to the depths of the soil direction （ p 〈 0.05） , the difference was significant, seeds number in litter layer and 0 - 5 cm soil layer was accounted for 83%. Seed quality survey results showed that 63.2% of the soil seed bank was empty seeds, 25. 1% of rotting seeds, intact seed only accounted for 11.7% of total.
出处
《林业调查规划》
2015年第4期30-33,共4页
Forest Inventory and Planning
关键词
偃松
土壤种子库
空间分布
种子质量
Pinus pumila
soil seed bank
spatial distribution
seed quality
