Rice Photosynthetic Productivity and PSII Photochemistry under Nonflooded Irrigation

Table 2

Analysis-of-variance (𝐹-values) for chlorophyll (Chl), net photosynthetic rate (𝑃_𝑁), stomatal conductance (𝑔_𝑠), intercellular CO₂ concentration (𝐶_𝑖), maximal quantum yield of PSII photochemistry (𝐹_𝑣/𝐹_𝑚), PSII maximum efficiency (𝐹_𝑣^′/𝐹_𝑚^′), effective quantum yield of PSII photochemistry (Φ_PSII), and nonphotochemical quenching (NPQ) between/among years and treatments.

Source of variation	df	DMPA	Yield	Chl	𝑃𝑁	𝑔𝑠	𝐶𝑖	𝐹𝑣/𝐹𝑚	𝐹𝑣^′/𝐹𝑚^′	ΦPSII	NPQ
Cultivation mode	3	421.55***	351.21***	163.10***	141.22***	13.73***	20.91***	45. 72***	143.24***	178.31***	16.43***
Year	1	4.15^ns	3.78^ns	2.27^ns	4.25^ns	0.03^ns	0.26^ns	2.28^ns	2.65^ns	0.89^ns	0.07^ns
C × Y	3	3.11^ns	2.41^ns	1.05^ns	0.32^ns	0.57^ns	0.47^ns	2.94^ns	3.56*	1.17^ns	0.08^ns

∗Significance difference at 𝑃<0.05.
***Significance difference at 𝑃<0.001.
^nsNonsignificant differences.