Effects of mepiquat chloride and plant population density on leaf photosynthesis and carbohydrate metabolism in upland cotton

Table 1 Effects of the mepiquat chloride and planting density on the seed cotton yield, biological yield, and harvest index in 2019 and 2020

Treatment	Seed cotton yield /(kg·ha⁻¹)	Biological yield /(kg·ha⁻¹)		Harvest index
MC1D1	3 266.3e	6 708.4e		0.49a
MC1D2	3 976.9c	8 725.2c		0.46bc
MC1D3	4 518.0a	11 119.3a		0.41d
MC0D1	3 562.0d	7 546.0d		0.47ab
MC0D2	4 184.4b	9 453.9b		0.44c
MC0D3	4 242.1b	10 915.6a		0.39e
MC1	3 920.4a	8 851.0b		0.45a
MC0	3 996.2a	9 305.2a		0.43b
		2019	2020	2019	2020
D1	3 414.1c	7 170.3c	7 084.1c	0.47a	0.49a
D2	4 080.7b	8 772.3b	9 406.9b	0.46a	0.44b
D3	4 380.1a	10 561.8a	11 473.1a	0.41b	0.39c

Means within a column followed by different letters are significantly different at P = 0.05. MC: mepiquat chloride; MC0: no MC application; MC1: MC application; D1: 2.25 plants· m⁻²; D2: 4.5 plants·m⁻²; D3: 6.75 plants·m⁻²

ISSN: 2523-3254