Table 2. The effects of the waterlogging treatments at the different growth stages on the fruit branch, fruit branch node, boll number, boll weight, seed cotton yield, yield reduction rate, dry matter and RSR of cotton.

Waterlogging	Waterlogging	Fruit branch		Fruit branch		Boll number		Boll		Seed cotton		Yield reduction	Aboveground		Root dry		RSR
stages	duration (d)	number		node number				weight (g)		yield (g)		rate (%)	dry matter (g)		matter (g)
Seedling	2	15.0	ab	28.7	ab	11.0	ab	4.5	ab	41.8	ab	0.5	23.8	ab	6.3	ab	0.26
	4	14.5	ab	28.0	ab	10.6	ab	4.6	a	41.8	ab	0.5	22.7	bc	5.6	cd	0.25
	6	14.0	bc	26.0	bc	10.0	bc	4.0	bc	40.0	bc	4.8	22.5	bc	5.3	de	0.24
	8	11.5	ef	25.0	bc	8.5	cd	4.0	bc	36.5	cd	13.1	20.6	cd	4.6	ef	0.22
	10	10.0	gh	23.0	cd	8.0	cd	3.8	cd	34.3	cd	18.3	19.1	cd	4.1	fg	0.21
Squaring	2	13.0	cd	26.5	bc	10.3	ab	4.5	ab	40.2	ab	4.3	23.2	ab	6.0	bc	0.26
	4	12.7	cd	26.3	bc	10.0	bc	4.4	ab	40.0	bc	4.8	21.2	bc	5.5	cd	0.26
	6	12.3	de	25.8	bc	9.9	bc	4.0	bc	38.5	bc	8.3	21.7	bc	5.0	de	0.23
	8	10.5	fg	23.7	cd	8.8	cd	3.9	bc	33.5	cd	20.2	19.4	cd	4.7	ef	0.24
	10	9.8	h	22.5	de	7.5	de	3.6	cd	30.3	e	27.9	18.6	cd	4.3	fg	0.23
Flowering	2	12.0	de	25.5	bc	8.3	cd	4.0	bc	36.0	cd	14.3	20.5	cd	4.5	ef	0.22
	4	11.5	ef	24.5	cd	7.3	de	3.9	bc	32.3	de	23.1	16.2	d	4.2	fg	0.26
	6	10.5	fg	24.0	cd	7.6	de	3.7	cd	30.8	de	26.7	16.0	d	4.0	fg	0.25
	8	8.5	i	19.5	ef	5.5	ef	3.4	de	26.5	f	36.9	12.6	e	3.0	h	0.24
	10	8.3	i	19.0	f	4.0	f	3.2	e	25.7	f	38.8	12.4	e	2.6	h	0.21
Boll-opening	2	15.5	a	29.0	a	11.2	a	4.6	a	42.0	a	0.0	26.4	a	6.5	a	0.25
	4	15.0	ab	28.7	ab	11.0	ab	4.5	ab	41.8	ab	0.5	24.6	ab	6.4	ab	0.26
	6	15.0	ab	28.7	ab	10.0	bc	4.4	ab	40.0	bc	4.8	23.8	ab	6.3	ab	0.26
	8	14.5	ab	28.5	ab	9.7	bc	4.0	bc	40.0	bc	4.8	24.8	ab	5.4	de	0.22
	10	14.5	ab	28.5	ab	9.5	bc	4.0	bc	38.8	bc	7.6	20.8	cd	4.4	fg	0.21
CK		14.5	ab	28.5	ab	11.2	a	4.6	a	42.0	a	0.0	24.1	ab	6.5	a	0.27

The statistical analysis is two way ANOVA, and values followed by different letters within the same row are significantly different at P = 0.05 probability level.