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对鹤山以马尾松和湿地松为主的针叶植物混交林的辐射能、光合呼吸作用与初级生产力、生物量与器官热值等综合研究，并与同地点同龄的豆科植物混交林进行了对比和分析．结果表明：全年抵达该群落林冠上层的总太阳辐射能为４２２５．９ＭＪ·ｍ（－２）·ａ（－１），林冠反射了５６７．６ＭＪ·ｍ（－２）·ａ（－１），截获了１８７６．１ＭＪ·ｍ（－２）·ａ（－１），仅有１７９２．２ＭＪ·ｍ（－２）·ａ（－１）的太阳辐射能透过林冠层；群落现存的总能量为１３２．０ＭＪ·ｍ（－２）·ａ（－１），每平均净固定能量为１１．８ＭＪ·ｍ（－２）·ａ（－１）；群落各树种在各器官上的能量分配中，干材积累能量占总现存能量的５７．８％，枝条１８．８％，叶１４．９％，根系８．５％；群落冠层截获的１８７６．１ＭＪ·ｍ（－２）·ａ（－１）能量中有４０．１０ＭＪ·ｍ（－２）·ａ（－１）用于光合作用，这其中又仅有１３．６６ＭＪ·ｍ（－２）·ａ（－１）能量用于净初级生产力，其光能利用效率约为０．３２％，虽然同站的同龄豆科植物混交林的冠层结构、净初级生产力和光能截获率均好于该针叶混交林的相应值，但由于豆科植物混交林快速生长时期短，而这些针叶树种耐贫瘠且生长稳定，也是较?
The comprehensive study of radiant energy, photosynthetic respiration, primary productivity, biomass and organ calorific value of coniferous plantations mainly consisting of Pinus massoniana and Pinus elliottii in Heshan were carried out and compared with the same legumes mixed plantation Comparison and analysis. The results showed that the total solar radiation reaching the canopy reached 4225.9MJ · m -2 · a -1 and the canopy reflected 567.6MJ · m -2 · a -1, , Intercepted 1876.1MJ · m (-2) · a (-1), and only 1792.2MJ · m (-2) · a (-1) of solar radiation can penetrate the canopy layer. The total available energy of the community Was 132.0 MJ · m -2 · a -1, and the net energy per net was 11.8 MJ · m -2 · a -1. , Dry matter accumulated energy accounted for 57.8% of the total existing energy, branches 18.8%, leaves 14.9%, 8.5% of roots; interception of canopy community 1876.1MJ · m (-2) · a -1), 40.10MJ · m (-2) · a (-1) was used for photosynthesis, of which only 13.66MJ · m -2 · a -1 energy was used for net Primary productivity, its light energy With the efficiency of about 0.32%. Although the canopy structure, net primary productivity and light intercepting rate of leguminous plants in the same station in the same station were better than the corresponding values in the mixed forest of legumes, Rapid growth period is short, and these conifers resistant to poor and stable growth, but also more?