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于灌浆期在连续自然光照下测定了白金2N和白金4N剑叶的pH值。结果是:1.光饱和点Sp-2N和Sp-4N均为45klux左右。2.等照点Ri为14Klux左右。3.光补偿点Cp-2N为2.5Klux左右,Cp-4N为4Klux左右(但不能迅速表现出来)。4.照度Ii≥Sp的区域,Pn仍是波动的,振幅At-2N为±5mgco_2dm~(-2)·hr~(-1);At-4N为±3mgco_2·dm~(-2)·hr~(-1)。5.在Cp与Sp之间,Pn的变化率K2N为0.85,K4N为0.50。
The pH value of the flag leaf of platinum 2N and platinum 4N was measured under continuous natural light during grain filling period. The results are: 1. Light saturation points Sp-2N and Sp-4N are about 45klux. 2. Other photos Ri point of about 14Klux. 3. The light compensation point Cp-2N is about 2.5Klux, Cp-4N is about 4Klux (but can not be quickly demonstrated). 4. Pn is still fluctuating in the region of illumination Ii≥Sp with amplitude At-2N of ± 5 mgco_2dm -2 hr -1; At-4N of ± 3 mgco_2 · dm -2 hr -1 ~ (-1). 5. Between Cp and Sp, the rate of change of Pn K2N is 0.85 and K4N is 0.50.