不同林型下早春植物层片生物量的分析研究

THE STUDY ON BIOMASS OF THE EARLY-SPRING PLANT SYNUSIAS IN DIFFERENT DECIDUOUS FOREST

早春植物是温带夏绿林中的一类较为特殊的植物类群,在充分利用光能和提高生态系统生产力方面具有十分重要的意义。本文通过对黑龙江省东部山区6个夏绿林型中的早春植物层片生物量特点的研究,初步掌握了不同林型下及各林型总体情况的早春植物层片总生物量的基本特点和生物量的种群结构特点,初步结果表明,不同林型下早春植物层片的总生物量具有较大的差异,其范围为7.88—23.22g/m,各林型平均为14.30g/m;在不同林型下早春植物层片生物量的种群结构均以黑水银莲花(Anemone amurensis)占主要地位,在每个林型中,其生物量基本上都占层片总生物量的40%以上。此外,本文还对早春植物的个体生物量特点进行了研究,结果表明早春植物的含水率均较高,干鲜重比率一般都在10—25%之间,平均为20%左右。同时早春植物的单株生物量与其株高和冠幅间具有较为明显的相关性,可以利用株高和冠幅模型进行定量描述,并通过利用不同林型下层片的平均株高和冠幅对整个层片的生物量进行估算,其计算结果与实测结果的统计检验表明差异不明显,说明了这些模型的适用性。

The early-spring plant synusias take a important part in the solar radiation utilization.The biomass of the early-spring plant synusias,the population structure of biomass and singel plant biomass charcteritics in 6 deciduous forest of the east of Heilongjiang province have been studied. The conclusion of the study represents: 1.The difference of biomass of the early-spring plant synusia in every forest type is distince,the range of biomass is 7.88-23.22g/m,and the average value is 14.30g/m. 2.The population structure charcteristics of biomass indifferent forest type is domi- nanted by Anemone amruensis,its biomass in every forest type is more than 40%. 3.The moisture content of the early-spring plant is more than others,its weight dry/fresh is 10-25% and average is about 20%. 4.The single plant biomass is distinct correlation with the plant high and the crown size,most of the specice's correlation index are more than 0.85.And the calculated value of the synusias biomass using these model are exmined by statistics, the result represents that the calculated value makes no difference to the value of har- vest.