Figure 4: Chl content of cultivar Ninggeng28 (Oryza sativa L.) under CF, DI, FIM, and FIN treatments at the grain-filling stage, respectively, in Shihezi. The CF indicates conventional flooding, and the DI, FIM, and FIN are plastic film mulching with drip irrigation, plastic film mulching with furrow irrigation, and no mulching with furrow irrigation, respectively. Vertical bars represent SE of the mean; the SE was calculated across five replicates for each year and averaged for the 2 years. Values of different treatments followed by the same letter indicate no significant differences ( ) according to least-significant-difference test.