Table 2. Effects of plastic film mulching and irrigation on ear characters.

Year	Irrigation (mm)	Treatment	Eer rows	Grains per row	100-grain weight	Grain weight per ear
			(row)	(grain)	(g)	(g)
2012	220	TN	13.3a	25.7b	24.1a	82.4b
		PM	13.8a	28.2a	21.8b	84.8a
	270	TN	13.8a	30.9b	25.7b	110.0b
		PM	13.6a	34.4a	28.2a	131.9a
	320	TN	13.7a	36.1b	28.1b	139.0b
		PM	13.4a	37.9a	29.3a	148.8a
2013	220	TN	13.1a	26.1b	24.5a	83.8b
		PM	13.7a	27.9a	22.7b	86.9a
	270	TN	13.3a	30.5b	25.9b	106.1b
		PM	14.1a	33.7a	27.7a	131.6a
	320	TN	13.4a	35.4b	27.8b	131.9b
		PM	14.3a	36.8a	28.9a	152.1a

Values within a column and for the same year followed by different letters are significantly different at P = 0.05. PM: plastic film mulching management; TN: traditional non mulching management