Cotton Science

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Effects of different irrigation treatments at flowering and boll setting stage on photosynthetic characteristics and yield of cotton

Qi Wenting, Xue Haowen, Wang Zhengjun, Wang Hang, Ma Xiaopeng, Xiao Juan, Wang Jiandong

Cotton Science, 2024, 36(4): 340-352. DOI: 10.11963/cs20240017

影响因素 Impact factor	光合指标Photosynthetic indicator	线性方程 Linear equation	R²	P	光合指标Photosynthetic indicator	线性方程 Linear equation	R²	P
S	P_n	y=0.013x+2.483	0.511 3	<0.01	T_r	y=0.002x+0.829	0.513 5	<0.01
T_l		y=0.920x-17.582	0.511 6			y=0.134x-2.479	0.530 7
RH		y=-0.258x+23.521	0.522 1			y=-0.041x+4.158	0.512 9
T_a		y=0.698x-9.957	0.523 4			y=0.110x-1.012	0.531 8
S	G_s	y=0.085x+20.798	0.522 5	<0.01	C_i	y=-0.229x+380.930	0.516 6	<0.01
T_l		y=-5.974x+258.310	0.525 7			y=-16.358x+766.290	0.515 6
RH		y=2.037x-19.367	0.530 5			y=5.536x-52.471	0.530 1
T_a		y=-5.404x+213.160	0.519 0			y=-11.975x+576.480	0.510 5

Table 3 Simple linear regression equations of photosynthetic indexes of cotton leaf and their influencing factors

Other figure/table from this article

Table 1 Irrigation amount and irrigation frequency of each treatment
Fig. 1 Schematic diagram of cotton planting mode and layout point of moisture probes
Fig. 2 Dynamic change of soil moisture content under different treatments
Fig. 3 Diurnal change of photosynthetic parameters of cotton leaf under different irrigation treatments
Table 2 Comparison of daily average photosynthetic parameters of cotton leaf under different irrigation treatments
Fig. 4 Diurnal change of influencing factors of photosynthetic parameters of cotton leaf under different treatments Different lowercase letters in the same column indicate significant difference among different treatments at the same time (P < 0.05).
Fig. 5 Correlation analysis between photosynthetic indexes and their influencing factors P_n: net photosynthetic rate, T_r: transpiration rate, G_s: stomatal conductance, C_i: intercellular CO₂ concentration, WUEL: water use efficiency of leaf, θ: soil moisture content in 0-60 cm soil layer, T_l: leaf temperature, S: solar radiation intensity, T_a: ambient temperature, RH: relative humidity of atmosphere. * indicates significant correlation at the 0.05 probability level.
Table 4 Multiple stepwise regression equations of photosynthetic indexes and their influencing factors in cotton
Table 5 Comparison of yield traits and water use efficiency of cotton under different treatments
Table 6 Comprehensive benefit evaluation of cotton based on photosynthetic indicators, yield and its components, and irrigation quota
Table S1 Physical properties of soil in experimental field

模态框（Modal）标题

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