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无论光通量密度(PPFD)为200靘ol穖-2穝-1还是500靘ol穖-2穝-1,生长在林冠下的红松幼苗光合速率达稳定净光合速率的50%和90%的诱导时间均长于全光条件下生长苗木。全光下生长的红松幼苗在PPFD为500靘ol穖-2穝-1时的诱导反应较PPFD为200靘ol穖-2穝-1时缓慢,而林冠下生长苗木则恰好相反。表明林冠下生长红松幼苗的光合作用诱导期与光斑强度有关。图3参6。
The photosynthetic rate of Pinus koraiensis seedlings grown under the canopy reached 50% and 90% of the steady-state net photosynthetic rate irrespective of the luminous flux density (PPFD) of 200 靘 ol 穖 -2 穝 -1 or 500 靘 ol 穖 -2 穝 -1 Time are longer than the growth of seedlings under all-light conditions. When the PPFD was 500 靘 ol 穖 -2 穝 -1, the induction reaction of Korean pine seedlings grown under full light was slower than that of PPFD 200 靘 ol 穖 -2 穝 -1, while the seedlings under canopy growth were the opposite. The results showed that the induction period of photosynthesis of Pinus koraiensis seedlings under canopy growth was related to the light intensity. Figure 3 reference 6.